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Investigation on microstructure evolution, mechanical properties and corrosion resistance of dual phase stainless steel joints welded by GTAW and SAW methods Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-04-14 Qiaoling Chu, Dan Yang, Zhe Chang, Kai Cao, Weiwei Xie, Guanhong Liu, Fuxue Yan
Duplex Stainless Steels (DSSs) have excellent mechanical properties and corrosion resistance thanks to the biphasic ferritic-austenitic microstructure. This microstructure feature is highly influenced by the welding heat cycles. In this research paper, the effect of gas tungsten arc welding (GTAW) and submerged-arc welding (SAW) on the microstructure, mechanical and corrosion properties of SAF 2507
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Applicability investigation on failure assessment diagram of ASME code section XI - Appendix H for ferritic nuclear piping Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-04-12 Hsoung-Wei Chou, Jiun-Shya Yu, Chin-Cheng Huang
The failure assessment diagram (FAD) is a widely used tool for evaluating the fracture acceptance of structural components. In addition to linear elastic fracture mechanics, elastic-plastic fracture mechanics, and limit load analysis, the ASME Code incorporated FAD as an alternative safety evaluation method for flaws in nuclear pipes starting from 2004 edition. This paper conducts a series of finite
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Application of bandage repair systems in the power sector to restore pipeline integrity Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-04-09 Jindřich Kozák, Lucie Krejčí, Ivo Hlavatý, Michal Bučko, Sergej Hloch, Martin Fryšák, Madhulika Srivastava, Ján Viňáš, Martin Vašek
This work explores the possibility of repairing damaged pressure piping systems using composite repair bandaging technology. Loctite technology from Henkel was selected from several existing methods and applied at the weld joint. To assess the performance of the bandage, a bore was made at the weld joint to simulate a replacement defect of the composite bandage. The bandage, along with the welded joints
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A benchmark elastic–plastic finite element analysis of plate with a surface crack under tensile load for the development of the reference stress method Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-04-05 Satoyuki Tanaka, Thin Thin Htut, Hiroshi Okada, Takahiko Gouda, Yuta Tonbe, Takumi Nagano
Benchmark calculations were performed for steel plate subjected to tensile loading. Semi-circular and semi-elliptical cracks with various depths and aspect ratios were assumed. Elastic–plastic fracture analyses were carried out using finite element (FE) method. Two kinds of hardening laws were adopted and elastic–plastic fracture parameter, J-integral, was computed. The J-integral values from the FE
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Experimental study on pipeline corrosion behavior coupled with microorganisms and dynamic alternating current interference Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-04-04 Bo Wang, Rui Ma, Yuanhao Chang, Weiqiang Wang
Underground pipelines buried deeper than 1.5 m or in specific soil conditions are susceptible to microbial corrosion and dynamic alternating current (AC) interference. Yet, research on the coupled effects of these factors remains limited, leaving their mechanisms unclear. The study employed microbial activity tests, electrochemical experiments, and microscopic morphology characterization to elucidate
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Laser welding of ultra-high strength steel rocket engine shell Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-04-04 Jiecai Feng, Qianjing Ren, Jian Gao, Shulei Liu, Yilian Zhang, Lijian Zhu, Xi Chen, Meng Jiang, Hongfei Liu, Yingzhong Tian
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Fatigue damage recovery and enhanced fatigue limit of austenitic stainless steel using multiple high-density pulsed electric currents Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-27 Sungmin Yoon, Yasuhiro Kimura, Yang Ju, Yuhki Toku
The damage evolution and fatigue life of austenitic stainless steel subjected to high-density pulsed electric currents (HDPECs) were investigated in this study. The change in the fatigue damage evolution owing to the application of HDPECs was evaluated using the cumulative fatigue damage model. Fatigue damage recovery was successfully demonstrated in the low-cycle fatigue and high-cycle fatigue (HCF)
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Investigation on weld forming, microstructure and mechanical characteristics of dissimilar steel GTAW under novel composite magnetic field Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-27 Wei Zhou, Jianfeng Yue, Pu Zhong, Haojie Chen, Hao Zhou
During dissimilar steel welding, differences in magnetic permeability and thermophysical parameters between materials result in significant disparity in heat distribution on both sides of weld and poor weld formability. To solve the welding quality problems caused by significant disparity in heat distribution, a novel composite magnetic field consisting of longitudinal magnetic field (LMF) and cusp
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Calculation model for critical depth of kinked dents on pipelines with internal pressure Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-26 Ping Zhang, Huiqing Lan
Kinked dent is caused by the external force on the oil and gas pipeline, and its curvature is small, which seriously affects the operation safety of the pipeline. This paper focuses on the study of the critical depth of kinked dent for steel pipelines with internal pressure, to propose the safety evaluation criterion for pipelines with kinked dents. First, a full-scale hydraulic bursting test of a
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Investigation of erosion behavior of particle-fluid flow in offshore platform T-pipes Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-20 Yuting Shan, Jiaqiang Jing, Ziyin Zhang, Jie Sun, Ning Wang, Lequan Zhuang, Yuying Guo
The process of viscous oil exploitation is often accompanied by small sand particles, which harms safety production and causing consequences such as erosion. T-shaped pipes are widely used in offshore platform, and its flow protection is very important for the safe operation. This work aims to investigate the particle trajectory and erosion ratio rule in viscous oil transportation by simulation, experiment
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Real-time stress field reconstruction method using online monitoring parameters for thick-walled power plant components based on gappy proper orthogonal decomposition Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-20 YuanLiang Wang, ChangShuo Li, ZhongLiang Zhu, Hong Xu, YongZhong Ni
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Effect of ion penetration on the aging of EPDM components used in caustic liquid transfer lines by microscopic analysis Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-15 Amer Awwad, Dwayne McDaniel, Leonel Lagos, Jose Rivera, Berrin Tansel
The waste transfer lines at the United States Department of Energy's Hanford Site Tank Farm in Benton County, Washington, USA have flexible sections that are fabricated from ethylene propylene diene monomer (EPDM) hoses. The hoses are of a hose-in-hose design with an inner hose that carries the waste and an outer hose that acts as containment in the event of an inner hose failure. During waste transport
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Microstructure, mechanical properties, and corrosion behaviour of wire arc additive manufactured martensitic stainless steel 410 for pressure vessel applications Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-12 Rajkumar V, N. Siva Shanmugam, N. Pravin Kumar, K. Krishna Kumar, A. Rajesh Kannan
High-strength martensitic stainless steel 410 (MSS 410) was successfully fabricated without defects via wire arc additive manufacturing (WAAM). The microstructural features, mechanical properties, and corrosion performance of WAAM-processed MSS 410 were examined. Microstructural analysis revealed the existence of equiaxed and coarse columnar dendrites and the formation of residual delta-ferrite and
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A P–S–N curve fitting method based on mixed Weibull distribution and expectation-maximization algorithm Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-11 Jianhui Liu, Xianyu Liu, Feilong Hua, Xuemei Pan, Ruicheng Feng, Jianfeng Wen
In practical engineering, there are many factors affecting the fatigue life of actual components, and a single Weibull distribution is insufficient to accurately describe the impact of various factors on fatigue life. In order to solve the above problems, 316L stainless steel is taken as the experimental object to study the effects of phase difference and stress levels on fatigue life based on the
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A closed-form structural stress-strain relation and implications on plastic design limits in codes and standards Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-03-02 Zhigang Wei, Pingsha Dong
The deformation of elastic-perfectly plastic beam or plate under combined through-thickness membrane and bending stresses (i.e., structural stress) is analyzed in this paper. Closed-form solutions of “plane-remains-plane” strain (i.e., structural strain) distribution as a function of applied stress and yield strength is derived. The relationship between structural stress and structural strain is also
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Fatigue and leakage-type damage detection in metallic plates and pipelines using piezoelectric patch acoustic sensors Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-29 Nawal Kishor Banjara, Saptarshi Sasmal, Santosh Kapuria
Piezoelectric sensors are used to convert mechanical energy into electrical energy, and vice versa and, therefore, can effectively be used for dual applications as actuator or sensor. Though Piezoelectric patch sensors (piezos) have been commonly used for active sensing, application of piezos for passive sensing, such as capturing the acoustic emission (AE) signals, needs more in-depth investigations
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Numerical investigation on seismic response of isolated APR1400 main steam pipe under optimized support direction Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-29 Derui Kong, Wenguang Liu, Zhijia Li, Hao Xu, Qiang Zhang
The main steam pipe connecting the isolated island and turbine building is subjected to the seismic response difference of different buildings. Isolation technique enhances the safety of nuclear islands during earthquakes, while the displacement of the isolation layer increases the main steam pipe damage risk. A novel proposed solution in this study involves optimizing the pipe support scheme while
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Study on failure probability and fragility assessment of spent fuel pool for nuclear power plants under the beyond design basis earthquake Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-29 C.H. Chang, C.L. Chung, H.W. Chou, C.C. Huang
A series of structural, numerical, probability and statistics analyses were carried to assess the safety of spent fuel pool (SFP) under the beyond design basis earthquake (BDBE) for PWR power plants in Taiwan. The fragility assessment with capacity and demand probability distribution function (PDF) showed that failure probability of the liner is about 0.33%. This low failure probability indicates that
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Strenght of mechanical structures in the case of loads/stresses superposition or cumulation, based on the concept of participation of specific energy Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-29 Valeriu V. Jinescu, Angela Chelu, Georgeta Roman
Mechanical structures, in many practical cases, are loaded simultaneously and/or successively by two or more loads. They can be of the same nature, but of different types (for example mechanical: force, pressure, bending moment, torsion moment …), or of a different nature (mechanical, chemical, thermal, electrical, magnetic …).
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Model-experiment comparison of quasi static loading on a composite overwrap pressure vessel (Part 2) Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-24 Erick Montes de Oca Valle, S.M. Spearing, Ian Sinclair, Trevor Allen, Warren Hepples
A methodology to develop a 3D Finite Element (FE) model of a full metal-lined Composite Overwrapped Pressure Vessel (COPV) was developed and is presented in this paper. The model is intended for prediction of the metal-composite delamination and residual dent depth developed in the metal liner as a result of quasi-static indentation loading. Cohesive elements are used to model the composite and the
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An overview on recent development of impression creep test Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-23 Zhufeng Yue, Ming Li, Guoyan Zhou, Zhixun Wen, Wei Sun, Shan-Tung Tu
This paper aims to present recent advancements and insights into the impression creep test, elucidating the nature of associated data conversion relationships. The clarification of the benefits of adopting a rectangular indenter is discussed initially, followed by the introduction of a mechanics-based data conversion approach utilizing the reference stress method. The paper then provides updates on
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A computational tool for the design of rigid origami structures based on a lumped damage model Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-22 Yongtao Bai, Ershuai Wei, Julio Flórez-López
As it is well known, origami structures have broad application prospects in aerospace, medical, architectural, robotics, material science, and other engineering fields. However, the comprehension and modeling of the collapse process of this kind of structure are still in the process of development. This paper investigates one specific failure mode: ultra-low cycle fatigue under large displacements
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Root cause analysis of cracking in buried X80 natural gas pipelines Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-21 Qingshan Feng, Lianshuang Dai, Quan Liu, Haidong Jia, Xiuyun Wang
In 2021, cracks formed in an onshore buried X80 natural gas pipeline with a diameter of 1219 mm. The present study investigated the cause of this failure through environmental and operational assessment, metallurgical evaluation, mechanical testing, material testing, stress analysis, and hydrogen embrittlement (HE) sensitivity testing. The results indicated that the failure was primarily attributable
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Voids in type-IV composite pressure vessels manufactured by a dry filament-winding process Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-21 Masahito Ueda, Tatsuhiro Hidaka, Naruki Ichihara, Haiya Yang, Wataru Iwase, Tetsuya Matsuda, Naoki Morita, Ryoma Aoki, Tomohiro Yokozeki
Type-IV high-pressure hydrogen-gas tanks for fuel-cell electric vehicles are made from carbon fiber-reinforced plastic. Their production involves wrapping a carbon-fiber-reinforced thermoset resin towpreg around a plastic liner to form a tank shape, followed by heating in an oven to cure the thermoset resin. The filament-winding process produces many voids in the tank that cause variations in quality
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Fatigue crack growth and slow crack growth of HDPE pipes under internal pressure and flat plate compression Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-20 Bingjun Gao, Mingyuan Luo, Kaiming Lin, Juncai Ding, Botao Liu
High-Density Polyethylene (HDPE) pipes are widely used in city gas and water systems as buried pipelines for their excellent performance. However, in addition to the internal pressure, it also suffers loads from traffic vehicles, foundation settlements, and illegal buildings. In this paper, fatigue crack propagation of HDPE pipes with a longitudinal external crack was experimentally studied under different
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Stress relief simulation for post-weld heat treatment process of pressure equipment: Creep constitutive equation considering temperature and stress variations Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-16 Bin Yang, Haowen Yu, Wenchun Jiang, Wenbin Gu, Jingkai Chen
Due to the limited testing methods and high costs, researches on the evolution law of residual stress in the post-weld heat treatment (PWHT) process of pressure equipment are mainly by numerical simulation, in which the selection of a reasonable and reliable creep constitutive model is crucial to ensure the accuracy of numerical predictions. It is worth noting that the temperature changes and residual
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Low cycle fatigue behavior of Incoloy 800H weld joint at 800 °C Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-15 Weiya Zhang, Ming Song, Genghua Xie, Dingrong Qu, Wenwu Chen, Linqi Zhu
The fatigue behavior of the 800H weld joint at the temperature of 800 °C was investigated, taking into account the effects of residual stress and microstructure. To model the residual stress in the welded joint, a finite element method was employed and its accuracy was verified using a hole drilling method, which was also used to study the evolution of residual stress during cutting and heating processes
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Application of various low cycle fatigue evaluation rules to notched compact tension specimen test data Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-14 Kyoung-Chan Yoo, Hyun-Seok Song, Jong-Min Lee, Yun-Jae Kim, Jin-Weon Kim
Existing low cycle fatigue evaluation methods are applied to notched C(T) specimens test data of low alloy and stainless steels to quantify conservatism embedded in evaluation methods. Three methods are considered: American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (B&PV) Code Sec. III simplified elastic-plastic analysis method, elastic-plastic fatigue analysis method given
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Investigation of Hydrogen Transport Properties through the Liner Material of 70 MPa Type IV Composite Overwrapped Pressure Vessels Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-13 M, u, k, e, s, h, , K, u, m, a, r
In zero-emission solutions for the hydrogen supply chain, high-pressure hydrogen storage in Type IV composite overwrapped pressure vessels (COPVs) is crucial for being safe and secure for a variety of stationary and transport applications. These COPVs consist of a polymeric liner material that works as a barrier for the stored hydrogen, while the carbon fiber-based composite provides the strength to
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Improved SWT model for predicting multiaxial fatigue life of bellows under combined movement load Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-13 Jianming Zhang, Yuanyuan Ma, Tianyi Su, Qingdi Yuan, Zhongliang Song, Hongfeng Pang
In a study focused on bellows used in engineering applications, an improved SWT (Smith-Watson-Topper) model was employed to predict the multiaxial fatigue life of the bellows under internal pressure and combined movement (axial movement and lateral deflection) conditions. The bellows experience tensile-shear and compressive-shear loading due to combined movement. The fatigue performance of the bellows
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Study on fracture assessment by GTN model for BWR reactor internals based on material properties of simulated irradiated stainless steels Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-11 Shuichi Yoshida, Takuya Ogawa, Takahiro Hayashi, Toshiyuki Saito, Yasuhiro Hattori, Shunsuke Sasaki
The fitness for service code of the Japan Society of Mechanical Engineers (JSME) provides a fracture evaluation methodology based on linear elastic fracture mechanics (LEFM) for boiling water reactor (BWR) internal components irradiated to a neutron fluence of 3.0 × 10 n/m or more. On the other hand, it is known that austenitic stainless steel maintains its ductility and toughness even after neutron
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Determination of multiaxial creep stress rupture criteria for 316H stainless steel at 600 °C Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-07 Kun Zhang, Jie Su, Jian-Ping Tan, Yu-Tai Su, Ji Wang, Li-Ping Zhang, Xue-Jiao Shao, Dong-Chuan Su, Chang-Jun Liu
In this work, the applicability of three different methods, denoted as the direct method, the indirect method, and the simple empirical method based on uniaxial creep damage tolerance parameter, , for the determination of multiaxial stress rupture criterion (MSRC) is assessed. The assessment involves four commonly-used MSRCs, the Sdobyrev and Hayhurst-Leckie (denoted as SHL), the Cane, the Nix and
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The effect of welding on brittle fracture: A statistical investigation Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-05 Zachary Narowlansky, Mahmoud Mostafavi, Martyn Pavier, Mehdi Mokhtarishirazabad, Peter Budden
This research aims to quantify the contribution of welding residual stress and microstructural embrittlement to the toughness variation of a set of submerged arc weldments. To determine these contributions, the fracture toughness of several ferritic steel plate butt-weldments was measured using the method for J-integral estimation detailed in .
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Multi-conditional dynamic response of parallel multi-pipelines in the same tunnel based on leakage and explosion conditions - A case study of China-Myanmar tunnel pipelines Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-03 Wei Liu, Peng Zhang, Jing Wang, Yimiao Li, Qin Yang, Siming Liu
The explosion of oil and gas pipelines, a severe incident, typically results in incalculable losses in terms of life, property, and environmental damage. To assess the impact of leakage and explosions on adjacent pipelines within a triple-tube tunnel, the TNT equivalent of the explosion was calculated based on leakage volume. Subsequently, a 3D nonlinear FE model for tunnel pipelines subjected to explosions
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Residual stresses in autofrettaged functionally graded pressurized thick cylinders Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-02-02 Meriem Belhaou, Nor Eddine Laghzale, Abdel-Hakim Bouzid
A popular process in the high-pressure vessel industry is the use of autofrettage to enhance the performance of thick-walled cylinders subjected to high internal pressure. This work focuses on nonlinear behavior of pressurized thick-walled cylinders made of functionally graded materials. The stress distributions in these cylinders are determined analytically using the Von-Mises yield criterion considering
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Finite element analysis of the limit load of pipe bend with local wall-thinning defect under complex loads Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-30 Bingjun Gao, Yong Qi, Yan Li, Junhua Dong
Local wall-thinning of pipe is a common volume defect in application, which would cause pipeline leakage or rupture under complicated pipeline loads. The finite element analysis method was used to analyze the limit load of Pipe Bend with Local Wall-Thinning defect (PB) under internal pressure, bending moment, torsion moment, axial force, and their combinations. The limit load empirical equations of
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Reliability index of a pipe transporting hydrogen submitted to seismic displacement Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-30 Alric Lucas, Guy Pluvinage, Capelle Julien
The reliability index was determined for a pipe presenting a corrosion defect, subjected to an internal hydrogen pressure, buried in a soil with a reaction and subjected to displacement due to seismic activity. The results are obtained by calculating the failure condition: strain demand greater than strain resistance, which is usually the basis of local strain-based design (LSBD). From a probabilistic
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Assessment of tensile deformation and fracture toughness behavior of 10Cr steel at ambient and high temperatures Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-28 G. Shanthi, S.A. Krishnan, P.K. Parida, R. Mythili, A. Moitra, M. Vasudevan
10Cr steel is one of the candidate materials for turbine rotors of advanced ultra-super critical (AUSC) power plant. Towards characterization of mechanical behaviour of 10Cr steel, the mechanism of plastic flow and fracture behaviour have been investigated in the temperature regime of RT to 600 °C. The flow behaviour (true stress – strain relationship) of the material could be well represented by Voce
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Assessing the master curve reference temperature T0 estimated from the Charpy impact transition curve and consequences on the correlation between Charpy DBTT- and fracture toughness T0-shifts Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-24 R, a, c, h, i, d, , C, h, a, o, u, a, d, i
Integrity assessment of reactor pressure vessels of light water reactors follows well established procedures relying on the surveillance program and defined by codes, standards and nuclear regulatory requirements. These procedures were developed in times where scientific knowledge was limited increasing therefore conservative safety margins to overcome the scientific shortcomings.
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Creep in welded AISI 310 steel – An experimental comparison between fracture and phase transformation Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-24 Julianna Magalhães Garcia, Luiz Paulo Brandao
This study investigates the creep behavior of notched AISI 310 steel specimens, both welded and unwelded, using GTAW ER 310 welding. Double-edge notch specimens were subjected to a stress of 100 MPa at temperatures of 700 and 675 °C. Characterization through SEM/EDS, XRD, and microhardness revealed fracture times and deformations differing from literature findings, with superior performance observed
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Experimental study on slow tensile, fatigue, and impact on X42 steel and #20 carburizing steel Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-19 Yanbo Shao, Xin Liu, Yiwei Song, Zeyu Zhang, Pengshen Wang, Xiao Xing, Wenshan Peng, Shaohua Xing, Jiang Bian, Xuewen Cao
Hydrogen embrittlement is a common phenomenon in high-strength steels and presents a significant challenge in the research and development process. This study aims to analyze the mechanism of hydrogen embrittlement, investigate the causes of crack growth in steel, and conduct experiments at mesoscopic and microscopic scales to gain a deep understanding of the relationship between hydrogen embrittlement
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Development of an experimental-analytical method for obtaining optimal two-layer welding window of a Ni–Cr–Mo–V alloy steel Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-18 Mohammadreza Jahangiri, Morteza Aieneravaie, Hessam Bayani, Mohsen Mehdizadeh
This study investigates the feasibility of using two-layer tungsten inert gas (TIG) to repair damaged parts made of 3.5NiCrMoV low-alloy steel, which is widely used in various industries for complex and thick components. Experimental and analytical methods are used to determine the optimal heat input for the second layer of welding, which can eliminate the need for post weld heat treatment (PWHT).
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Measurement and assembly methods for bolted flange joints using three-dimensional digital image correlation Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-17 Hongfan Yang, Huanxiong Xia, Lijian Zhu, Xiaoqiang Li, Changlin Du, Jianhua Liu, Xiaohui Ao, Da Li
Bolted flange joints are extensively used in pressure vessels and piping equipment. The assembly coaxiality accuracy and bolt pre-tightening force are particularly important in causing the risk of seal and leakage failure. This paper proposed a novel non-contact measurement and assembly adjustment method to reduce the coaxiality angle deviation efficiently. The flange joint is first bolted according
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Buckling behaviour of steel dome cap design under external pressure Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-11 Mohd Shahrom Ismail, Syed Mahathir Muhammad al-Attas, Jamaluddin Mahmud
This study aims to numerically investigate the buckling behaviour of externally pressurised dome caps. Following the recommendations of the European Standard EN 1993-1-6, there was good agreement between the Finite Element (FE) model and the experimental results, with an average difference of less than 7 %. Several imperfection approaches, such as (i) single load indentation (SLI) and (ii) axisymmetric
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Buckling characteristics of carbon fiber composite/aluminium alloy combined cylindrical shells under external hydrostatic pressure Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-11 Weili Wang, Yongmei Zhu, Longbo Zhou, Jian Zhang
The buckling behaviour of combined shells fabricated from aluminium alloy and carbon fiber–reinforced polymer (CFRP) composites subjected to external hydrostatic pressure were investigated. Three sets of combined cylindrical shells with different combinations and one set of bare aluminium alloy cylindrical shells were designed and fabricated. The wall thickness of each cylindrical shell was measured
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Modeling of creep-fatigue features of hydrogen storage bed and its parameter optimizing based on finite element method and orthogonal experimental design with artificial neural networks Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-11 Li Yang, Xiangguo Zeng, Huaqin Kou, Ruochao Sun, Ping Zhao, Xiuming Zhang
Regarding the creep-fatigue behavior of hydrogen storage bed (HSB) structures under high-temperature loading and internal pressure loading under repeated hydrogen absorption and desorption process, the heat transfer characteristics and creep-fatigue life during a complete service process in HSB were calculated using Ansys Workbench and Ncode software, and the reliability of the life results calculated
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Modelling of hydrogen diffusion leading to embrittlement in austenitic stainless steels Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-10 P. Cavaliere, B. Sadeghi, A. Perrone, D. Marsano, A. Marzanese
The paper presents the 3-D model of the hydrogen diffusion in austenitic stainless steel. In order to model the material behaviour, a real microstructure taking into account the grain boundaries, the dislocations density, the vacancies number and the precipitates state was analysed in order to the implemented in the employed software (ANSYS). The effect of each single hydrogen trap was physically determined
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Development of a convolutional neural network model to predict the size and location of corrosion defects on pipelines based on magnetic flux leakage signals Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-30 Y. Shen, W. Zhou
This study employs the convolutional neural network (CNN) to predict the dimensions and locations of corrosion defects on steel pipelines based on magnetic flux leakage (MFL) signals. Extensive three-dimensional parametric finite element analyses are carried out to generate MFL signals corresponding to semi-ellipsoidal-shaped corrosion defects with different sizes and locations on a pipe model. The
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Quantitative research on stress failure risk assessment for girth welds with unequal wall thickness of the X80 pipeline under lateral load Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2024-01-03 Tengjiao He, Jiancheng Liao, Kexi Liao, GuoQiang Xia, Yutong Jiang, Benwei Huang, Jing Tang
The cumulative length of the X80 steel pipeline extends to 17,000 km, with a predominant portion traversing mountainous terrains characterized by intricate geological formations. Recurrent geological hazards significantly impede the safe operation of oil and gas pipelines. Landslides can induce substantial axial forces on steel pipelines, significantly increasing the risk of pipeline failure. Moreover
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Performance of buried pipeline under reverse fault in permafrost region Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-26 Jinghong Xue, Xiang Wang, Li Ji, Xiaoyao Dong
Long-distance pipelines may pass through areas of frozen soil sometimes, such as the Trans-Alaska pipeline and the Chinese Northeast pipeline. This work intends to analyze the performance of buried pipeline under reverse fault motion in such regions. A pipe-soil system model was established, and the thermo-mechanical coupling analysis was carried out. The temperature distribution of the soil near the
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Development of pressure-temperature limit curves considering unified constraint for reactor pressure vessel Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-29 Y. Zheng, G.Z. Wang, S.T. Tu, F.Z. Xuan
In this work, the pressure-temperature (P-T) limit curves considering unified constraint for a typical large-sized reactor pressure vessel (RPV) with axial surface cracks have been investigated and developed based on the KJ-Ad* two-parameter and the Master Curve (MC) method. The ASME fracture toughness KIc curve and the MC with and without considering unified constraint for irradiated RPV steel were
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Review and discussion of strength mismatch of girth welds in high strength pipelines Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-28 Qing-Shan Feng, Yan-Hui Zhang
Pipelines may be subject to displacement-controlled external loads exceeding yield strength of materials due to many causes, e.g., soil settlements and ground movement. It is important to ensure that strength of girth welds even- or over-matches that of pipe steel to avoid strain concentration in the weld leading to a premature failure of a pipeline. Unfortunately, a number of high strength pipeline
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Generation and classification models of ultrasonic signals in aged cast austenitic stainless steel (CASS) Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-28 Jin-Gyum Kim, Changhui Jang, Sung-Sik Kang
In this study, we attempted to generate new ultrasonic signals from thermally aged CASS specimens using a statistical-based model to augment the experimental data. A variational auto-encoder (VAE) model is adopted to generate the ultrasonic signals. To verify the quality of the generated data (signals), two ML algorithms (k-nearest neighbor and multi-layer perceptron algorithms) were used for classification
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Effect of aging on microstructure and mechanical properties of dissimilar steel welded joints between G115 and Sanicro25 steel Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-27 Maohong Yang, Zheng Zhang, Yanrong Liu, Linping Li, Guiyi Wu, Shuyan Zhang
This paper studied the high-temperature stability of dissimilar steel welded joints between G115 and Sanicro25 steel. The joints were exposed to 700 °C for time up to 2000h. The microstructure evolution of base metal (BM) and fine-grain heat-affected zone (FGHAZ) were analyzed. Tensile, microhardness, and impact experiments were conducted on the joints, and the explanations for the changes in mechanical
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Irradiation-induced age-related degradation mechanisms effect on integrity of baffle former bolts Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-26 Jae-Min Jyung, Hwan-Jae Joo, Yoon-Suk Chang, Seung Jin Oh
For long-term operation of nuclear power plants, integrity of structures, systems and components should be ensured rigorously. In particular, since the complicated reactor vessel internals (RVIs) have been exposed to high temperature and neutron irradiation environment, materials reliability programs on the RVIs to resolve anticipated issues were conducted by several research institutes. The objectives
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Analyzing joint efficiency in storage tanks: A comparative study of API 650 standard and API 579 using finite element analysis for enhanced reliability Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-21 Deivi García-G, J. Barco-Burgos, Jaime Chaparro, U. Eicker, Joya Cárdenas D.R, Alberto Saldaña-Robles
This study compares two renowned methodologies, API 650 and API 579, focusing on the analysis of joint efficiency at a value of 0.7. Using Finite Element Analysis (FEA), the research suggests that a 35 % increase in filling height might be achievable for a large tank that adhere to the stability criteria outlined by API 650. To support these findings, 337 simulations rigorously examined various parameters
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A novel refined Caputo kernel and constitutive concepts for semi-exact nonlinear dynamic and creep analyses of suddenly pressurized hollow fractional-order visco-hyperelastic cylinders Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-20 M. Shariyat
Some reports have confirmed that discretizing the mass, damping, and stiffness characteristics of a continuum can result in remarkable deviations from the experimental results; as all these properties are intertwined and coupled within a single material. The viscoelastic constitutive laws with fractional-order time derivatives can model this integrity much more accurately, due to their capability of
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The analysis of strain response for as-received and exploited 10H2M power engineering steel subjected to low cycle fatigue in plastic regime Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-10 Mateusz Kopec
Thermal shocks occurred during power plant station shutdowns result in notable changes in material microstructure and affect its mechanical behaviour significantly. High temperature gradients as well as internal pressure changes in pipes are also responsible for external and internal stress introduction. Such stress may also exceed the yield strength of the material resulting in its deformation. Thus
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Dynamic modeling and stress reduction optimization of parallel pipelines based on pipe-solid element coupling Int. J. Press. Vessel. Pip. (IF 3.0) Pub Date : 2023-12-10 Fangming Liu, Wei Sun, Hui Zhang, Shang Lyu
In aero-engine, spatially parallel pipelines are prone to damage under the harmonic excitation produced by rotors, thus there is an urgent need for vibration reduction research. This paper presents a finite element modeling method for parallel pipelines based on pipe-solid element coupling and performs clamp layout optimization with the objective of reducing the stress response. The modeling idea can