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Effect of surface modification on the high temperature low cycle fatigue performance of LPBF 316L austenitic steel Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-15 Jiayuan Gu, Xiaowei Wang, Yuntao Gao, Yefeng Chen, Zhen Zhang, Jianfeng Wen, Jianming Gong
In this study, high temperature low cycle fatigue (LCF) tests at 550 °C were conducted on LPBF (Laser powder bed fusion) 316L with three different surface states, including the As-built surface (AB), fill contour (FC) manufacturing surface, and the surface combining FC and electropolishing (FC + EP). The effect of surface treatment on the high temperature LCF performance of LPBF 316L was investigated
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Mode I fracture propagation and post-peak behavior of sandstone: Insight from AE and DIC observation Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-15 Xiaoran Wang, Shuxin Liu, Xiaofei Liu, Tiancheng Shan, Xin Zhou, Hui Xie, Jinhua Wang
Microcracks generated at the crack tip, particularly in quasi-brittle materials such as sandstone, give rise to a non-linear region known as the fracture process zone (FPZ), which cannot be analyzed using linear elastic fracture mechanics (LEFM). To gain insights into the nonlinear fracturing behavior of rock, this study conducted three-point bending experiments on sandstone beams with prefabricated
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Mechanisms of anisotropic fracture resistance of nacreous structure and design: Essential role of cracking modes of organic interfaces Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-12 Tian Qiu, LiHong Liang
Nacreous structure holds significant promise for biomimetic design applications due to its excellent mechanical properties. In this paper, the influence of loading direction on the mechanical properties of nacreous structure was investigated to understand its mechanisms of anisotropic fracture resistance. The results revealed significant anisotropy in the mechanical properties of nacre when loaded
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Influence of solid solution treatment on fatigue crack propagation behavior in the thickness direction of 2519A aluminum alloy thick plates Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-12 Qiang Hu, Wenhui Liu, Yufeng Song, Heng Li, Chenbing Zhao, Mingyue Xiao
2519A aluminum alloy thick plates have excellent applications in the military industry due to their superior ballistic resistance and fatigue properties. However, the delamination cracking along the thickness direction of this alloy hinders its further utilization. To address this issue and enhance the fatigue properties of this alloy, the effect of single-stage solid solution treatment (SST) and two-stage
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Predicting failure initiation at V-notch tips in an AISI 4340 alloy by a continuum damage model Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-12 Brigit Mittelman, Nitzan Rom, Zohar Yosibash, Elad Priel
Predicting the fracture in quasi-brittle structures composed of steel alloys near V-notch tips presents a significant challenge. We investigate to which extent the continuum damage approach predicts the failure load when applied to experiments performed on AISI 4340 alloy specimens tempered at two different temperatures and containing three different V-notch opening angles loaded to fracture under
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Phase field modeling of crack propagation in three-dimensional quasi-brittle materials under thermal shock Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-11 Tao Wang, Yichen Zhang, Haoyue Han, Lei Wang, Xuan Ye, Zhuo Zhuang
Quasi-brittle materials create intricate crack patterns on their surface and internal three-dimensional crack networks when exposed to thermal shock conditions. Their cracking behavior is notably impacted by their quenching temperature and size. In this paper, a coupled three-dimensional phase field-cohesive zone model that accounts for thermoelastic fracture is developed to reproduce the quenching
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Cross-scale method of MD-FE for modeling mechanical damage behaviors of ferrite-cementite steels Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-10 Manjiang Yu, Fangli Duan
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A multi-scale experimental investigation on fatigue crack propagation rate behavior of powder bed fusion-laser beam 316L stainless steel subjected to various heat treatments Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-10 Wen Zhu, Ziad Moumni, Jihong Zhu, Yahui Zhang, Yajun You, Weihong Zhang
In this study, three heat treatments referred to as heat treatment 1 (HT1), HT2, and HT3 were applied to tune the microstructure of powder bed fusion-laser beam (PBF-LB) 316L stainless steel. Furthermore, the fatigue crack propagation rate (FCPR) of as-built PBF-LB 316L specimens and specimens subjected to the three aforementioned heat treatments was thoroughly investigated. To this end, the FCPR was
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Prediction of crack initiation for notched concrete beam from FPZ at maximum load Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-09 Xiaozhi Hu, Zhimin Wu
The initial cracking load () of a notched concrete beam, difficult to measure, has been predicted from the maximum fracture load () together with the notch-tip fracture process zone (FPZ) at . A simple analytical model is used to link and together through the FPZ. The corresponding initiation and unstable fracture toughness, and , have also been determined. The model assumes that the lower limit of
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Rapid evaluation of trade-offs between strength and impact toughness of wheel steels by instrumented spherical indentation test Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-09 Feng Yu, Sancheng Yao, Jian Fang, Mingcheng Sun, Yingzhi Li
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An interlaminar fatigue damage model based on property degradation of carbon fiber-reinforced polymer composites Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-06 S.A. Khan, S.S. R. Koloor, K.J. Wong, T. Dickhut, M.N. Tamin
Interface delamination is a significant damage mechanism in fiber-reinforced polymer (FRP) laminated composites caused by interlaminar normal and shear stresses. This is due to the low interlaminar properties including interface stiffness and strength that continuously degrade to cause fatigue crack nucleation and growth. In this respect, an interlaminar fatigue damage model is proposed to accurately
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A deep neural network-based method to predict J-integral for surface cracked plates under biaxial loading Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-06 Jinjia Wang, Yu Zhang, Yangye He, Yixuan Mao, Renjie Yang, Peng Zhang, Menglan Duan
As surface cracks may cause potential failure for engineering structures, it is of vital significance to carry out the fracture assessment for cracked structures. The crack driving force in the form of -integral is an important input parameter in fracture assessment. This paper focuses on the determination of -integral for surface cracked plates under biaxial loading. A method for predicting the -integral
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Characterisation of mode-I fracture resistance of adhesive layers with imperfections Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-06 Leo Škec, Giulio Alfano
In this work, a novel procedure to evaluate the influence of imperfections at the interface (such as voids and interfacial failure) on the fracture resistance of adhesive joints in mode-I debonding is proposed, based on an image-processing analysis of the crack surface. Its application to the characterisation of fracture resistance of aluminium DCB specimens bonded with an epoxy adhesive leads to a
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A new peridynamic interface model for fracture analysis of imperfect interface Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-05 Heng Zhang, Dan Huang, Qinghui Liu, Mengxin Liu
In this study, a new peridynamic interface model is proposed for the imperfect interface fracture analysis. The peridynamic interface bonds are defined for the imperfect interface modeling, and formations of bond normal and tangential interface forces are given. An extended critical bond energy density-based criterion is proposed for interface bonds failure analysis, and mixed-mode fracture mode is
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A plastic Stillinger-Weber potential-based discretized virtual internal bond approach for modeling soft rock fracture and its application in tunnel failure Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-05 Yuezong Yang, Zhushan Shao, Kui Wu, Yujie Wang
Soft rocks present some undesirable behaviors, such as low strength, high plasticity and softening. These traits pose challenges in the design and construction of soft rock tunnels. To address these issues and model plastic fracture behaviors of soft rocks, we proposed a plastic Stillinger-Weber (PSW) potential and integrated it into the discretized virtual internal bond (DVIB) model. The PSW-DVIB
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Rock fractures developed in the Class II post-peak unloading Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-04 Hongyu Wang, Elena Pasternak, Arcady Dyskin, Phil Dight, Yu Zhou
In this study, post-peak tests were conducted on sandstone specimens subjected to uniaxial compression under two different loading conditions: axial strain control and lateral strain control. The fractures developed in both loading regimes were investigated. Under axial strain control, Class I post-peak stressstrain curves (with negative slope) were obtained until the complete failure of the specimens
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A novel method to calculate the load vs. crack extension curve based on the load vs. load-line displacement curve Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-04 Guangrui Tong, Longkun Lu, Shengnan Wang
In order to obtain the crack growth resistance curve, a typical fracture test must measure the load vs. crack extension () curve. Apart from the basic measurement of the load vs. load-line displacement () curve, additional instruments or tedious test operations such as partial unloading are necessary to measure the amount of crack extension. This paper proposed a novel method of calculating the curve
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A tensile properties-related fatigue strength predicted machine learning framework for alloys used in aerospace Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-04 Jiangbo Fan, Zhangwei Wang, Changqi Liu, Duoqi Shi, Xiaoguang Yang
A tensile properties-related fatigue strength prediction framework based on machine learning (ML) methods was proposed. Firstly, 200 data containing six materials used in aerospace were collected. Secondly, tensile properties-related ML framework, including residual neural network (ResNet) model, gradient boosting decision tree (GBDT) model and LightGBM (LGB) model, was established to predict fatigue
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Acoustic emission based characterization of void nucleation in a ductile fracture model Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-03 Subham Chakraborty, Anuradha Banerjee, Shyam M. Keralavarma
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Rock fracturing mechanism and arrangement of fracturing holes using hydro-mechanical splitters Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-04-02 Hongsheng Li, Zijian Wu, Songyong Liu, Congcong Gu, Xiaodi Zhang, Panpan Xu, Lei Zhang, Jing Meng, Zhaoyu Hao
For more-efficient tunneling in hard rock, reported here are simulations and experiments to analyze the rock fracturing mechanism and determine the optimal arrangement of fracturing holes when using hydro-mechanical splitters in tunnel excavation. First, a numerical model of rock fracturing is established using the cohesive-zone model, enabling analysis of the relationship between fracturing force
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Peridynamic analysis of thermomechanical effects in fracture toughening mechanisms of stop holes Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-29 E. Yousefimiab, M.F. Basoglu, A. Kefal
In this study, a bond-based fully coupled thermomechanical peridynamic framework is implemented to study the fracture toughening of stop-holes in brittle materials subjected to thermomechanical loads. The developed modelling approach aims to provide comprehensive guidance about thermal effects on the fracture toughening mechanism of inclusions under realistic engineering conditions. First, the model
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A threshold criterion of stress intensity range in a steel sheet Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-29 Gyoko Oh
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The mode I fracture toughness and acoustic emission characteristics of hot dry rock under temperature effects Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-28 Yu Zhao, Yilei Yuan, Chaolin Wang, Kun Zheng, Jing Bi
The application of liquid nitrogen fracturing technology exhibits promising potential in the exploitation of hot dry rock (HDR). Therefore, studying the variation in granite's fracture characteristics under rapid cooling with liquid nitrogen is highly significant. In this study, the mode I fracture characteristics and acoustic emission (AE) characteristics of thermally treated granite under liquid
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Damage Mechanics Challenge: Predictions based on the phase field fracture model Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-28 Yousef Navidtehrani, Ravindra Duddu, Emilio Martínez-Pañeda
In this work, we describe our contribution to the Purdue-SANDIA-LLNL . The phase field fracture model is adopted to blindly estimate the failure characteristics of the challenge test, an unconventional three-point bending experiment on an additively manufactured rock resembling a type of gypsum. The model is formulated in a variationally consistent fashion, incorporating a volumetric–deviatoric strain
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The effect of fracture growth rate on the fracture process zone of salt rock after heat treatment Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-28 Xiaomeng Wu, Lifeng Ma, Tao Meng, Zhixia Wang, Guanghui Zhao, Pengtao Liu, Xufeng Liang, Yi He, Reza Taherdangkoo
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Investigation on the fracture mechanics characteristics and crack initiation of deep dense shale Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-26 Ming-Li Xiao, Hong-Qiang Xie, Gan Feng, Qiang He, Huai-Zhong Liu, Li Zhuo
The mechanical behavior of shale fractures significantly affects the structure and stability of hydraulic fracturing networks in shale gas reservoirs. Currently, there is insufficient research on the mechanical characteristics of fractures, crack initiation, and the prediction of fracture trajectories in deep dense shale. This study involved conducting direct tension, shear, and three-point bending
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On the validity of the Tada stress intensity factor solution for the single edge notch tension specimen with pinned ends Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-26 Zachary D. Harris, Joseph W. Cochran, Richard P. Gangloff, Jacob D. Hochhalter, James T. Burns
The validity of the Tada stress intensity factor (K) for pinned-ends single edge notch tension [SEN(T)] specimens is assessed via a combined experimental-modeling approach. Analysis of fatigue crack growth rate reductions during constant-ΔK loading demonstrates that specific combinations of alloy stiffness, geometry, and loading result in the true K deviating below K. Geometrically non-linear, 3-dimensional
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Thermal fatigue failure analysis and life assessment of Ni-based single crystal superalloys with film cooling holes Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-26 H.Q. Pei, S.S. Wang, Y.Z. Yang, Y.Q. Yang, Z.X. Wen, D.L. Wang, Z.F. Yue
The transient thermal fatigue behavior of Ni-based single crystal superalloys with film cooling holes under different peak temperatures (25 °C → 980 °C and 25 °C → 1050 °C) were investigated by a combination of test and finite element simulation. The initiation position and propagation direction of thermal fatigue cracks in both single hole and multi-hole specimens exhibit the angles of ± 45° with
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Thermo-mechanical coupled peridynamics simulation of concrete failure under fire scenarios Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-24 Shike Wang, Xihong Zhang, Keyan Li, Jiyu Tang, Hu Feng, Zhanqi Cheng
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The strain ratio-dependent multiaxial low cycle fatigue behaviour and life prediction of 316L stainless steel based on critical plane at elevated temperature Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-24 Fei Liang, Wei Zhang, Xuanming Zhang, Xinghui Chen, Qiaofa Yang, Peng Yin, Changyu Zhou
The study mainly investigates the effect of strain ratio on the multiaxial low cycle fatigue behaviour of 316L at 550 °C. The evolution of both axial and torsional stress amplitude is observed to go through three stages: cyclic hardening, softening and fracture. What's different is that the torsional loading experiences fewer cyclic hardening cycles compared to the axial loading. Regarding the interaction
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A digital twin approach toward unlocking elasto-plastic fatigue crack growth rates under negative load ratios Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-24 Evan Wei Wen Cheok, Xudong Qian, Ser Tong Quek, Michael Boon Ing Si
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Simulation of crack closure effect on cracked beam vibrations Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-23 Dağhan Günhan, Bülent Acar, Suat Kadıoğlu
Vibrations of beams containing cracks are usually investigated by using open or breathing crack models. Neither one of these approaches considers the plasticity induced crack closure (PICC) phenomena which occurs in fatigue crack growth. In this study, PICC is integrated into the vibration analysis of a cracked beam. First, fatigue crack growth at a notch is simulated with elastoplastic finite element
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Validated assessment of power plant components with flaws and defects operating under long-term creep and isothermal creep-fatigue loading Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-23 Osorio Daniel, Mueller Falk, Ewald Juergen, Sheng Shilun, Almstedt Henning, Weihe Stefan
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A combined cyclic viscoplasticity and entropy generation approach for modelling fatigue crack growth behavior of a nickel-based superalloy at high temperature Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-21 Shuyang Xia, Shuiting Ding, Zhenlei Li, Guo Li, Shaochen Bao, Bolin Li
This paper developed an entropy-based approach to estimate the fatigue crack growth (FCG) behavior of GH4169 at high temperature. Firstly, systematic FCG experiments of GH4169 at 650 °C were conducted to obtain the experimental data. Then, a finite element analysis combined with Chaboche viscoplasticity and node release technology was developed to obtain cyclic stress–strain responses and entropy generation
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Effect of coarse second-phase particles on mechanical properties of large-scale 2219 Al alloy rings Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-21 Dan Xie, Can Liu, Yu Wang, Qiuyue Ouyang, Yuanpeng Gao, Wujiao Xu
Large-scale 2219 Al alloy rings are widely used as important parts on launch vehicles and thus have high requirements for the mechanical properties of rings in different direction, which are associated with coarse second-phase particles. Therefore, the objective of this study is to provide a comprehensive and systematic quantitative analysis of the effect degree of the coarse second-phase particles
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Analysis of crack-tip stress field in unidirectional fiber-reinforced composites based on 3D micromechanical model Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-21 Minghao Liu, Zheng Liu, Pengfei Jin, Jikang Li, Xuecheng Liu, Zhe Zhang, Xin Wang, Xu Chen
Accurately clarifying the influence of cracks on the mechanical behaviors of unidirectional fiber-reinforced composites (UD FRCs) is of great significance for the structural integrity evaluation of UD FRCs with defects. Although several experiments and numerical analyses have explored the impact of cracks on stress field, satisfactory quantitative characterizations of crack size, / and location, ,
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Assessing fracture toughness of vintage and modern X65 pipeline steels under in situ electrochemical hydrogen charging using advanced testing methodology Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-21 A.O. Myhre, D. Wan, A. Sendrowicz, B. Nyhus, H. Matsunaga, V. Olden, A. Alvaro, A. Vinogradov
The susceptibility of pipeline steels to hydrogen embrittlement, which can significantly impair mechanical performance, especially fracture toughness, is a critical issue in infrastructure integrity This study evaluates the fracture toughness of modern and vintage API X65 steels under cathodic polarization (CP) conditions, employing methods such as rising displacement testing, stepwise rising constant
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Energy release rate in bimaterial specimens tested in pure modes I and II Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-21 Faustino Mujika, Panayiotis Tsokanas, Ainhoa Arrese, Lucas F.M. da Silva
New closed-form analytical expressions of the energy release rate of a bimaterial cracked specimen are derived, when it experiences pure mode I in an asymmetric double cantilever test, and pure mode II in an asymmetric end-notched flexure test. The analysis is based on the strain coenergy and on the laminated beam theory. The results of the analytical approach are compared with those obtained using
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An efficient and robust staggered scheme based on adaptive time field for phase field fracture model Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-19 Yuanfeng Yu, Chi Hou, Xiaoya Zheng, Timon Rabczuk, Meiying Zhao
The standard staggered scheme in phase field model is computationally slow, so that a large amount of iterations are required. In order to improve the computational efficiency, a novel efficient and robust solution scheme based on adaptive time field is proposed in this paper. This scheme is inspired by the adaptive mesh method for space field, and an error indicator based on phase field and history
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An ordinary state-based peridynamic model for granular fracture in polycrystalline materials with arbitrary orientations in cubic crystals Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-19 Ting Zhang, Tiantian Gu, Jin Jiang, Jianzhi Zhang, Xiaoping Zhou
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Corrosion pit-induced stress concentration in 7005 aluminium alloy: Mechanical degradation and pit parameter analysis Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-18 Xinhui Li, Guan Wang, Linyuan Kou, Pei Zhang, Jialong Du, Hongping Liu, Xin Shang
Mechanical testing and surface analysis were used to investigate the corrosion behaviour of 7005 aluminium alloys in simulated atmospheric environments. Stress concentrations of pits lead to degradation of mechanical properties. The effect of pit sizes and location parameters on stress concentration was analysed using finite element (FE) method. The location of the secondary pits within the primary
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Cutting-edge insights: Crack growth rates in 9% Ni steel from room to cryogenic conditions influenced by crack closure and effective stress intensity factors Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-17 Yu-Yao Lin, Beom-Seon Jang, Sang-Woong Han, Young-Hwan Park, Jinha Hwang, Do Kyun Kim
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The low-cycle fatigue behavior and an entropy-based life prediction model for Nickel-based single crystal superalloy across an extensive temperature range Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-16 Jundong Wang, Leike Yang, Yeda Lian, Zhixun Wen, Hao Lu, Zhuobin Ma, Zhufeng Yue
Nickel-based single-crystal superalloys (Ni-SX) are prominently utilized in the fabrication of turbine blade materials for advanced aero-engines, owing to their commendable material characteristics. This paper delves into the low cycle fatigue (LCF) characteristics of a second-generation Nickel-based single-crystal superalloy across a temperature spectrum ranging from room temperature to 1000 °C. During
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A hydro-thermo-damage-mechanical fully coupled cohesive phase-field model for fracking in quasi-brittle thermo-poroelastic media Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-13 Hui Li, Zhenjun Yang, Xiaoxian Zhang, Shouding Li
A hydro-thermo-damage-mechanical fully coupled cohesive phase-field method is developed for modelling of fracking in quasi-brittle thermo-poroelastic media. A new sigmoid interpolation function is proposed to characterize the transitional behaviour from porous media to cracks for permeability, specific heat capacity, and thermal conductivity. A fluid continuity equation with the Darcy-Poiseuille law
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Dual-actuator mixed-mode bending tests on structural adhesive joints Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-13 Ihssane Kididane, Niklas Ladwig, Stephan Marzi
In this article, a novel mixed-mode bending (MMB) test setup is presented and used to investigate the fracture behavior of the structural adhesive SikaPower®-498. The novelty lies in the implementation of two actuators that can be controlled independently of each other. This opens up investigation possibilities that go beyond those of the MMB standard configuration. For example, a varying mode-mixity
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Flexural fatigue damage and life prediction of rod-shaped pultruded fibre-reinforced composite: Progressive damage model and acoustic emission measurement Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-13 Qian Zhang, Wenchun Jiang, Yanting Zhang, Jianlin Liu, Yun Luo
This study proposes an improved progressive fatigue damage model. The relation between cyclic property degradation and direction is established. The fatigue damage evolution and life of rod-shaped pultruded fibre-reinforced composite (PFRC) under three-point bending are investigated using the proposed progressive fatigue damage model and acoustic emission test. The damage and failure mechanisms of
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Multiple kinking of a tensile crack in the brittle multilayered media abundant with closely-parallel weak interfaces Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-12 Xiaguang Zeng
Crack kinking is a basic way to form a complex crack trajectory in a multilayered solid abundant with weak interfaces. However, it remains unclear that under which condition a multi-kinked crack emerges with the influence of closely-parallel weak interfaces. According to a basic crack kink criterion, here we consider a brittle multilayered plate with a tensile edge crack to seek the occurrence condition
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The over-notched flexure test method for determining the fracture toughness and bridging law of laminates Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-12 Ziming Wang, Yu Gong, Junwei Chen, Lewei Yan, Zhaohu Ding, Yongxiang Zhang, Ning Hu
This work introduces a novel approach for analyzing the over-notched flexure (ONF) test, aiming to calculate the fracture toughness and bridging law. The important feature of this new methodology lies in obviating the necessity for continuous observation of crack length and relative sliding displacement at the tip of pre-crack, and extra tests for determining flexural modulus. Formulations are derived
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A regional local level set method for tracking arbitrary 3D crack propagation Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-12 Zeyang Feng, Qinglin Duan, Ming Bai, Songtao Chen, Jinwei Ma
The geometrical description and tracking of non-planar crack surface with curved crack front evolving in 3D are a big challenge for crack modeling. We develop a numerical method for tracking arbitrary crack propagation. In this method, the crack surface is generated by the regional local level set (RLLS), which is based on the concept of element local level set, abbreviated as ELLS (Duan . (2009))
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An adaptive finite element method for coupled fretting wear and fatigue crack propagation simulation Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-12 Congman Wang, Xuecheng Ping
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A combined ALE-cohesive fracture approach for the arbitrary crack growth analysis Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-12 Umberto De Maio, Fabrizio Greco, Paolo Lonetti, Andrea Pranno
This work introduces an advanced numerical model, based on a cohesive zone approach and the moving mesh technique, for simulating fracture propagation in quasi-brittle materials. The proposed procedure involves two stages: first, a mesh boundary representing the crack is selected and aligned with the crack growth direction by using the Arbitrary Lagrangian-Eulerian (ALE) methodology; next, a zero-thickness
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The strain gradient viscoelasticity full field solutions for Mode-I and Mode-II crack problems Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-11 Kuanjie Ding, Zhongya Lin, Yehui Bie, Yueguang Wei
The impacts of size and viscosity become distinctly evident when considering micro- and nano-scale phenomena for advanced materials with micro- and nanostructures. In this study, the mechanical behavior of the advanced material is characterized by using the strain gradient viscoelasticity theory, and a novel solution is presented for the mode-I and mode-II cracks, which is formulated based on the strain
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Multi-scale modeling of decohesion characteristics of second phase particles from the matrix in uniaxial tension in a high strength aluminum alloy Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-11 Abhishek Sarmah, Mukesh K. Jain
This research investigates stress evolution and plastic deformation characteristics influencing particle–matrix interface decohesion in AA7075-O aluminum sheets. Employing a combined molecular dynamics (MD) - finite element (FE) approach, three interfaces (Al-η, Al-θ, Al-Fe-rich intermetallic) are studied under various loading conditions. Cohesive properties, represented by traction-separation (T-S)
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Experimental study and numerical simulation of transverse tensile behavior for thermoplastic glass fiber reinforced plastics Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-11 Min Lou, Chen Zhang, Yangyang Wang, Weixing Liang, Yu Wang
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A damage mechanics model under dynamic thermal loads and its application to pressure vessels under fire invasion Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-11 Weiye Luo, Mingshu Bi, Di Yu, Zilong Deng, Shaochen Sun, Jingjie Ren
The accurate prediction of pressure vessel rupture under fire invasion conditions is crucial for identifying boiling liquid expanding vapour explosions (BLEVEs). This study proposes a material damage model based on a calculus strategy to predict the evolution of material damage under dynamic thermal loads. In this model, the dynamic thermal load was differentiated, and the Gurson–Tvergaard-Needleman
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In-plane dynamic impact mechanical properties of novel bi-directional hierarchical honeycomb Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-10 Guangxiang Wang, Zhenzhen Cai, Xiaolin Deng
A novel bi-directional hierarchical honeycomb is proposed. A finite element numerical model was constructed using Abaqus/Explicit, the model's accuracy was verified, and a series of in-plane impact studies were carried out. Firstly, the mechanical properties of axial impact were analyzed for different bi-directional hierarchical honeycombs. The results show that the mechanical properties of NBHH-2-III
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Predicting ductile fracture during torsion testing using dislocation density tensor Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-09 Kazutake Komori, Sou Kaneko
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Interaction between a crack and a circular liquid inclusion Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-07 Xu Wang, Peter Schiavone
We study the interaction between a radial matrix crack and a circular compressible liquid inclusion embedded in an elastic matrix under uniform remote in-plane normal stresses. The crack is simulated by a continuous distribution of climbing edge dislocations. A Cauchy-type singular integral equation is derived by imposing the traction-free condition on the crack surfaces. The singular integral equation
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The principle of virtual energy for predicting the strength of material structures Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-07 Biao Wang
As a matter of safety, the reliable prediction of the structural failure of materials is the most important key issue for various types of engineered structures. Traditional theories of material strength mainly rely on empirical formulas. Although there are a variety of strength theories available in the literature, they are largely limited by the materials and working conditions of their application
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Assessing fatigue crack growth thresholds for a Ti-6Al-4V (STOA) alloy using two experimental methods Eng. Fract. Mech. (IF 5.4) Pub Date : 2024-03-05 Aniket Mote, Thomas E. Lacy, James C. Newman
Fatigue crack growth rate behavior in the threshold and near-threshold regimes for a Ti-6Al-4V solution-treated and over-aged (STOA) alloy was investigated using two test procedures: ) accelerated load reduction (ALR) utilizing faster load-shed rates than recommended in the ASTM standard E647 load-reduction (LR) test procedure, and ) compression pre-cracking constant-amplitude (CPCA) or load-increasing