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Design and characterization of cell topology effect on SiC VDMOSFETs for high power and frequency applications Eng. Res. Express Pub Date : 2024-03-27 Chia Lung Hung, Yi-Kai Hsiao, Hao-Chung Kuo
In this paper, we present a comprehensive investigation of the impact of cell topology and pitch reduction on the DC and AC characteristics of 1200V-rated 4H-SiC planar VDMOSFETs. We have designed and fabricated four different cell topologies, namely linear, square, hexagonal, and staggered cell, in order to characterize their performance. Among the various cell types, the hexagonal cell exhibits the
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Short review on the development of electrical discharge machine Eng. Res. Express Pub Date : 2024-03-27 Mangal Singh Sisodiya, Pankaj Agarwal
The electrical discharge machine (EDM) is an unconventional machine process. It uses thermoelectric energy to erode the work material. Usually, the EDM is employed to machine the hard to cut materials. The extraordinary characteristics of the EDM make the process more versatile for advanced manufacturing. The process is used to attend the intricate geometry with a high degree of accuracy. In the present
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Advances in fused deposition modeling on process, process parameters, and multifaceted industrial application: a review Eng. Res. Express Pub Date : 2024-03-27 Michael Enyan, Jesse Nii Okai Amu-Darko, Eliasu Issaka, Olivier Joseph Abban
In the current era of intense competition, optimizing the design and manufacturing processes through time reduction measures can prove to be advantageous. The objective of profit maximization is a crucial consideration across diverse industries. The utilization of 3D printing technology has been crucial in producing personalized items at a reduced expense and with increased efficiency across various
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Effect of temperature modulation on the performance of top contact bottom gate organic thin film transistor Eng. Res. Express Pub Date : 2024-03-26 Arun Pratap Singh Rathod, V P Dubey, R Gowri, P K Juneja
This research article investigates the influence of temperature variations on the performance parameters of Top Contact Bottom Gate (TCBG) Organic Thin Film Transistors (OTFTs). Employing the Arrhenius equation and Schottky emission model, the study explores temperature-dependent charge carrier mobility and injection mechanisms. Analyzing a wide range of parameters, the research unveils a complex interplay
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Development of a prototype of weeding robot Eng. Res. Express Pub Date : 2024-03-26 Van-Tinh Nguyen, Tran Thanh Tung
Weeds, or wild grasses, are naturally occurring grasses that grow in the wild without human cultivation. Weeds have detrimental effects on soil and crops, including competing with crops for space, nutrients, light, and moisture in the soil, which ultimately reduces crop productivity. Typically, herbicides are used to eliminate weeds, but all of these chemicals carry a potential threat to human well-being
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Effect of source and drain electrode positions on the performance of bottom gate organic thin film transistor Eng. Res. Express Pub Date : 2024-03-26 Arun Pratap Singh Rathod, V P Dubey, R Gowri, P K Juneja
In recent years several novel technologies have emerged on commercial level. Organic electronics is one such technology that has created new avenues for the development of flexible, robust, and cost-effective electronic devices. Transistor developed using organic materials are called organic thin film transistors (OTFT). Transistor is elementary component of any electronic device, any variation in
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Thermal enhancement of microchannel heat sink using pin-fin configurations and geometric optimization Eng. Res. Express Pub Date : 2024-03-22 Muhammad Anas Wazir, Kareem Akhtar, Usman Ghani, Mohsin Wajib, Shahmir Shaukat, Haseeb Ali
The microchannel heat sink (MCHS) is a robust cooling technique that ensures the efficiency and reliability of compact electronic devices by dissipating a large amount of heat because of its high surface area-to-volume ratio. This study proposes a novel modification of the pin-fins geometry in MCHS, and geometric optimization using response surface methodology (RSM) to build a low thermal resistant
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A novel three-dimensional orthogonal star honeycomb structure with negative Poisson’s ratio Eng. Res. Express Pub Date : 2024-03-22 Baofeng He, Qian Huang, Zhaoyao Shi
A novel three-dimensional(3D) orthogonal star honeycomb structure with increased strength and negative Poisson’s ratio(NPR) performance that is not subject to angle constraints was proposed, and the calculation model of Young’s modulus and Poisson’s ratio of the cell structure under axial load was derived in this study. Through the investigation of the deformation mode and the finite element (FE) research
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Anti-lock braking system control design using a non-linear multi-body dynamic model for a two wheeled vehicle Eng. Res. Express Pub Date : 2024-03-22 Aymen Khadr, Ajmi Houidi, Lotfi Romdhane
This paper investigates the design of an Antilock Braking System for a Two Wheeled Vehicle using a non-linear multi-body dynamic model developed by an approach widely used in robotics. The Antilock Braking System is controlled using Matlab/Simulink by applying the Bang-Bang, Proportional-Integral-Derivative and Fuzzy Logic controllers in order to set the longitudinal slip to a desired value. The developed
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Comparative analysis of cement-based bricks in India: a cradle-to-gate life cycle assessment Eng. Res. Express Pub Date : 2024-03-22 Tata Sravani, Prasanna Venkatesan Ramani, Madhumathi Anbu
The main aim of this study is to quantify the environmental impact caused by different types of bricks used in the Indian construction field. This study considered four brick types: Autoclave Aerated Concrete, Fly ash, and Cellular Foam bricks. The prime objectives of the investigation are to evaluate and compare the embodied energy and resource depletion by modelling the environmental impact of the
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Research and development of a new combination of piezo-thermoelectric energy harvester systems from roadways Eng. Res. Express Pub Date : 2024-03-20 Ando Ny Aina Randriantsoa, Damien Ali Hamada Fakra, Luc Rakotondrajaona, Riad Benelmir
Due to the problems associated with fossil fuels, scientists and governments are investigating alternative energy sources. In recent decades, there has been an increase in interest in initiatives involving the collection of clean, limitless energy. This paper focuses on two renewable energy harvesting combination technologies: mechanical vibration utilizing piezoelectric technology and thermal sources
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Static and seismic stability investigation of a bamboo grid reinforced slope with different stepped reinforcing arrangements Eng. Res. Express Pub Date : 2024-03-20 Rasmiranjan Samal, Smrutirekha Sahoo, Naveen Badavath
Bamboo is primarily used as a soil reinforcement material to build roadways and stabilize slopes and river banks. The current study aims to examine how bamboo grid reinforcing slopes behave in the form of various stepped reinforcing arrangements. The static and seismic characteristics of a slope reinforced with a bamboo grid were examined through 3D numerical analyses employing the finite element program
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A dual-band MIMO PIFA antenna with a printed rectangular open-ended ring for 5G/WLAN mobile terminal Eng. Res. Express Pub Date : 2024-03-20 Rachida Boufouss, Abdellah Najid
A dual-band 8 × 8 multiple-input-multiple-output (MIMO) PIFA antenna that operates in the sub-6 GHz spectrum for 5G and WLAN mobile terminals is presented. The eight elements of the MIMO antenna are formed by using an L-slotted PIFA antenna, an L-shaped parasitic element, and a 2D rectangular open-ended ring parasitic structure that is printed next to the L-shaped parasitic element. In this article
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Ductile fracture prediction of 7A62 high-strength aluminum alloy under a wide range of stress states Eng. Res. Express Pub Date : 2024-03-19 Fanlei Min, Huiping Liu, Dejing Zhou
The modified Gurson-Tvergaard-Needleman (GTN) model is employed to predict the ductile fracture of 7A62 high-strength aluminum alloy under a wide range of stress states. Mechanical tests were conducted on specimens with different stress states within the range of −0.33 to 1.35 stress triaxiality, including tension, notched tension, compression, and shear. The results indicate that at high stress triaxialities
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An analog PWM pixel circuit with shaping function for low grayscale display of Micro-LEDs Eng. Res. Express Pub Date : 2024-03-19 Chun Liu, Zhao-Hua Zhou, Lei Zhou, Li-Rong Zhang, Miao Xu, Lei Wang, Wei-Jing Wu, Jun-Biao Peng
This paper presents a new analog pulse width modulation (PWM) micro light-emitting diode (LED) pixel circuit with a shaping function. The rising/falling time of PWM signal generated by the proposed pixel circuit can be greatly reduced to improve the low grayscale display quality of micro-LED. Metal oxide thin film transistors with the top-gate (TG) coplanar structure are used to realize the proposed
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Assessment of temperature and ITCs on single gate L-shaped tunnel FET for low power high frequency application Eng. Res. Express Pub Date : 2024-03-19 Prabhat Singh, Dharmendra Singh Yadav
In a vertical TFET structure, controllability over the gate is enhanced because of the favorable electrostatic potential and tunneling under the entire gate region by preventing the direct source to drain tunneling. For an L-shaped TFET, the Band-to-Band-Tunneling (BTBT) is perpendicular and parallel to the channel length. Also, it has a higher I on (ON-current) with suppressed ambipolar current (low
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Studies on CRDI diesel engine performance and emissions using waste plastic oil and fly ash catalyst Eng. Res. Express Pub Date : 2024-03-18 A Abdul munaf, A Velmurugan, M Loganathan, M Bakkiyaraj, P Premkumar
Fossil fuels are quickly draining on a daily basis, causing fuel product prices to increase throughout the world. There is a crucial need to develop new alternate fuels from various sources that meet our daily requirements, like industries, mining, building construction, transportation, electric power generation from rural areas, etc. In the present study, mono-use low density polyethylene (LDPE) was
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A physically based constitutive model considering dynamic recrystallization of ERNiCrMo-3 alloy Eng. Res. Express Pub Date : 2024-03-18 Yan Yang, Zhiren Sun, Chengpeng Miao, Yu Fan, Sen Yang, Zekun Wang, Kaikun Wang
ERNiCrMo-3 alloy is widely used in the welding of nickel-based alloys. This study investigated the hot deformation and discontinuous dynamic recrystallization (DRX) behavior of ERNiCrMo-3 alloy through hot compression tests at deformation temperatures ranging from 990 °C to 1170 °C and strain rates ranging from 0.01 to 10 s−1. Experimental results showed that under conditions of elevated temperatures
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Design and testing of an arc resistant power transformer with a reinforced turret Eng. Res. Express Pub Date : 2024-03-18 Joakim Johansson, Samuel Brodeur
This paper presents the design and testing of a full-scale 510-kV, 415-MVA HVDC converter transformer prototype designed to withstand the resulting pressure of a 20 MJ low-impedance fault in oil occurring inside a bushing turret, which is one of the major causes of transformer fires. In addition, there is currently few studies and recommendation regarding this failure mode, which is the main motivation
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A COMSOL novel micromirror matrix model for digital image display Eng. Res. Express Pub Date : 2024-03-18 Fares Karaoui, Nadjia Benblidia, Hamida Bougherira
Digital micromirror devices (DMD) have gained significant attention in various scientific and industrial domains due to their potential for spatial light and laser modulation. However existing micromirrors designs often face limitations in terms of rotation angles, voltage consumption, and stability time for some type of applications. In this paper, we address these issues by exploring micromirror
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Multifunctional applications of passive solar stills in water treatment: an eco-friendly approach Eng. Res. Express Pub Date : 2024-03-15 Krishn Pratap Singh, Abhishek Dixit, Deepesh Singh
Conventional raw water treatment methods are expensive and require a sufficient energy supply for their operations. In remote and rural areas, these conventional methods are feasible due to a poor economy and interrupted power supply. This study provides a sustainable approach to treating raw water using solar energy and phase change material (PCM). Passive solar stills (SS) are sufficient to treat
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Designing and performance analysis of 7 T CNTFET based novel SRAM cell for IoT application Eng. Res. Express Pub Date : 2024-03-14 Neha Mathur, Shilpi Birla
The selection of the title includes designing of SRAM cell using CNTFET because CNTFET overcomes all the issues coming from CMOS technology beyond the 10nm technology node. With the reduction in channel length, the threshold voltage required for CMOS-based technology increases, and the corresponding off-state current decreases. This can prove to be a significant advancement for the semiconductor industry
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Advancements and challenges in additive manufacturing: a comprehensive review Eng. Res. Express Pub Date : 2024-03-14 Subhajit Chattopadhyay, Stephen Dilip Mahapatra, Nirmal Kumar Mandal
Additive manufacturing is an innovative new technology in which layers of materials are added strategically to produce three-dimensional structures. Over the course of recent years, it has undergone remarkable advancements, enabling the realization of intricate designs, shortening production timelines, and causing a transformative shift in manufacturing protocols. This comprehensive article examines
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A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms Eng. Res. Express Pub Date : 2024-03-13 Muhammad Shahzaib Shah, Mian Farhan Ullah, Danish Nouman, Muhammad Adnan Khan, Tahir Khan, Muhammad Waseem
Enhancing and regulating power quality is a fundamental necessity in any industry reliant on power, aiming for the optimal utilization of resources. The power quality challenges, including sags, swells, harmonic distortions, and interruptions, have been acknowledged as critical issues. Among these, sags and swells are prevalent and can significantly impact electrical devices or machines, necessitating
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A Revit-Midas/Civil conversion approach for bridge superstructures analysis Eng. Res. Express Pub Date : 2024-03-13 Jian Li, Haoxin Song, Zhenwei Zhou, Chao Yang, Liyu Wang, Hongtao Li
In this study, a model conversion method that combined Revit with Midas Civil software was proposed to improve the modeling efficiency and accuracy of finite element calculations for a large bridge structure. The secondary development program was established using the Visual Studio 2022 platform, which was used to convert the model information. A model conversion interface was created by extracting
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Assessing the role of friction stir welding tool shoulder profile and parameters on mechanical performance of Al5083 weld joints pre- and post-corrosion exposure Eng. Res. Express Pub Date : 2024-03-13 Chendrasekhar Sunnapu, Murahari Kolli
Al5083 alloy sheets were joined by friction stir welding (FSW) by using three different tools having different shoulder profiles (flat, concave and convex) at three different tool rotational speeds. From the cross-sectional microstructures, weld joints obtained at 1120 rpm with three different shoulder profiles were observed as defect free. XRD analysis confirms the development of texture that was
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Gas turbine aero engine fault detection using Geo-TLSVM and digital twin with multimodal data analysis Eng. Res. Express Pub Date : 2024-03-13 Naga Venkata Rama Subbarao Tadepalli, Ramji Koona
DT is the digital representation of physical systems to simulate real situations in a digital version. Here, the DT of the GaT-AE is created for the Fault Detection (FD) process. The GaT is a type of internal combustion engine that uses the air as the working fluid to propel the flight. However, the incorporation of big data analysis in the DT model is challenging in previous works. So, a multimodal
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Design and parametric optimization of lead free perovskite based tandem solar cell for higher efficiency Eng. Res. Express Pub Date : 2024-03-13 Shahraan Hussain, Balwinder Raj, Divya Sharma
A critical concern is the creation of effective and eco-friendly photovoltaic materials. The non-toxic perovskite substance methyl ammonium germanium tri-iodide (MAGeI3) has several applications in tandem solar cells. In this research, the efficiency of a multi-junction tandem solar cell with MAGeI3 as the absorbent layer in the top cell and FeSi2 as the absorbent layer in the bottom cell was examined
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Production of a double cermet coating to treatment of the turbine blades Eng. Res. Express Pub Date : 2024-03-13 Riyadh S Antar, Salih Y Darweesh, Fatima W Ridha
Turbine blades commonly encounter external defects, such as cracks and high porosity, while in operation. To mitigate these challenges, the method of thermal spraying by flame is utilized for the application of cermet materials, which comprise both metal and ceramics, onto the blades. This process involved incorporating manganese (Mn) into a chromium oxide (Cr2O3) base in varying proportions (3,6,9
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Composite channel 100 nm InP HEMT with ultrathin barrier for millimetre wave applications Eng. Res. Express Pub Date : 2024-03-13 Soumak Nandi, Shashank Kumar Dubey, Mukesh Kumar, Aminul Islam
This study introduces a High Electron Mobility Transistor (HEMT) designed for millimeter-wave applications, utilizing a composite channel structure based on InP and InGaAs-InAs-InGaAs. The proposed device incorporates an ultra-thin 2 nm barsrier layer, a distinctive composite channel topology, and a judicious selection of III-V materials. These features collectively contribute to an improved confinement
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Influence of layering sequence on performance of jute/wool epoxy hybrid composites: a comparative study with automotive plastic Eng. Res. Express Pub Date : 2024-03-12 Shivayogi B H, Manjunatha T S, P S Shivakumar Gouda, Maruthi Prashanth B H, Prashanth Pai M
Natural fibres such as Jute and Wool are increasingly being used in fibre reinforced polymer composites, hence progressively supplanting synthetic fibres. Combining these two unique natural fibers would improve the performance of composites used in secondary structural applications. This study is intended to investigate the effects of Jute and Wool fiber arrangement on mechanical properties in an epoxy
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Quantitative detection of rebar corrosion by magnetic memory based on first-principles Eng. Res. Express Pub Date : 2024-03-12 Mao Yang, Hong Zhang, Xiaotao Ma, Yu Zheng, Jianting Zhou
Reinforcement corrosion seriously impacts the bearing capacity and durability of reinforced concrete(RC) structures. It is very important to detect reinforcement’s corrosion state in concrete timely and effective. This paper introduced the magnetic memory method to the quantitative detection of reinforcement corrosion. Based onfirst- principles, the causes of material magnetism were explained from
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Recent advancements in magnetic abrasive finishing: a critical review Eng. Res. Express Pub Date : 2024-03-12 Rahul Kumar, Venkateswara Rao Komma
Many engineering applications require components with a good surface finish. It is difficult to get the surface finish in the micro/nano level range with conventional finishing processes for materials such as super alloys, composites, and ceramics. Magnetic abrasive finishing (MAF) is one of the processes for achieving superior surface finish. However, the processes efficiency is affected by its operational
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Dynamic mechanical characteristics of natural fiber hybrid composites, bio composites and nano composites –a review Eng. Res. Express Pub Date : 2024-03-12 Prabu Krishnasamy, Rajamurugan G, Ahmed Belaadi, Sasikumar R
Dynamic mechanical analysis (DMA) is a helpful technique in the evaluation of natural fiber composites (NFCs) for investigating the viscoelastic behavior concerning time, temperature, and frequency and calculating the phase shift. In this work, the DMA responses of biocomposites, nanocomposites, and hybrid natural fiber composites are compared, and the factors influencing the responses are evaluated
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Performance enhancement of cloud security with migration algorithm for choosing virtual machines in cloud computing Eng. Res. Express Pub Date : 2024-03-11 R Manivannan, S Senthilkumar, K Kalaivani, N Prathap
The management of the hardware as well as software resources entrusted to third-party service suppliers have shown to be extraordinarily remarkable and accessible with Cloud Computing (CC), a potential computing technology for the future. Yet, a major undertaking is characterized by security as well as the use of Virtual Machines (VMs) to perform a request. The main issue with using technology is security
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Probe with a metallic bowl termination to determine the electric material parameters from variable thicknesses Eng. Res. Express Pub Date : 2024-03-11 Ghislain Fraidy Bouesse, Franck Moukanda Mbango
This paper discusses a new approach to determining the material electric parameters (dielectric constant and dissipation factor) through a technique based on identical material variation thicknesses. The copper bowl controls the material thicknesses and allows quick and safe measurements to get to the electromagnetic material information. This approach assumes that the discontinuities generated at
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A stretchable breathable washable all-textile smart wearable keyboard Eng. Res. Express Pub Date : 2024-03-08 Youzhi Zhang, Haojie Wang, Ping Yu, Jinmiao Chen, Hangze Li, Jinming Wu, Xizhang Chen
The development of comfortable and lightweight wearable devices is an emerging technological goal in human-computer interaction. Conductive textiles attract a great deal of interest as versatile materials for wearable devices. It can naturally integrate into our daily clothing, making wearable devices more comfortable and convenient. However, developing all-textile wearable devices remains an important
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Programmable cell unit arrangement of 3D printing mechanical metamaterial undergoing tailorable local instability Eng. Res. Express Pub Date : 2024-03-08 Zhenghong Li, Haibao Lu
3D printing mechanical metamaterial is one of the most popular research topics due to the advantages of rapidity, design, and programmable mechanical properties. Many previous studies had conducted on the 3D printing mechanical metamaterial using the holey column structure, however, there is few of reports on the effect of programmable cell unit arrangement on the mechanical metamaterials, of which
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Development of piezoelectric impedance-based technique for rapid compressive strength measurement of mortar specimen using artificial neural network Eng. Res. Express Pub Date : 2024-03-08 Hyung-Jin Kim, Wongi S Na
Measurement of concrete strength is crucial for both the construction and maintenance stages of infrastructures. This importance is emphasized every year in Korea, where aging facilities require reliable and accurate assessment to prevent accidents. In general, three types of non-destructive testing methods are used for concrete maintenance, including the ultrasonic and rebound hardness methods, with
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Real-time experimental investigation of a multi-flow biomass gasifier by using various locally available wood biomass Eng. Res. Express Pub Date : 2024-03-08 Vikas Attri, Avdhesh Kr. Sharma
Biomass gasification is one of the prominent technologies for thermal applications, electricity generation through engines. The present investigation was carried out to obtain behavior of multi-flow gasifier by using locally available wood biomass chips (i.e., Acacia Nilotica & Eucalyptus biomass). Experiments were conducted to examine the variation of gas composition, LHV, cold gasification efficiency
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TLD optimal vibration control for elevated concrete water towers Eng. Res. Express Pub Date : 2024-03-06 Xuansheng Cheng, Guanjie Qi, Guoliang Li, Jianchao Chen
Considering the influence of earthquake and wind on the water tower, the analysis model of the elevated concrete water tower and its foundation is established. The dynamic response model and damping measures considering liquid–solid-soil interaction are determined. The influence of two kinds of circular tuned liquid dampers on dynamic response of elevated concrete water tower is studied. The results
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Powering of IOTs through single jersey wearable tribo-electric nano generator Eng. Res. Express Pub Date : 2024-03-06 Muhammad Amir, Rizwan Aslam Butt, Shenela Naqvi, Syed Farhan Hasany
A simple, lightweight, and easy to develop Single Jersey Wearable Tribo-Electric Nano Generators (SJ-WTENG) were constructed using Cotton and Acrylic fabrics (Triboelectric series materials). Fabrics were also coated with Maghemite (γ-Fe2O3) nanoparticles (13 nm) to increase the electrical conductance of the samples. Compression and Vertical contact-separation modes were adopted for studying the performance
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Assessment of photovoltaic generation penetration effect on the maximum loadability of the system Eng. Res. Express Pub Date : 2024-03-06 Santosh Kumar Gupta, Ashish Ranjan, Dhananjay Kumar, Lokesh Kumar Yadav, Md Atiqur Rahman, Vikash Kumar, Neeraj Kumar
This paper proposed a method to investigate the effect of increasing PV penetration on the voltage stability of an IEEE 14-bus test system considering maximum PV penetration and system loadability limit. The critical bus of the test system has been decided based on nose curve analysis. The solar PV system is deployed with the most critical bus of the system. The effect of increasing PV penetration
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Experimental study on wire electric discharge machining of nimonic 90 using coated electrode Eng. Res. Express Pub Date : 2024-03-06 Midthur A Salman Khan, Senthilkumar C
WEDM machine is an unconventional machine that got accepted in the industries because of its skill to machine any material precisely in the required shape and size. Wire electric discharge machine uses electrical energy to cut hard conductive materials. In the present study, Nimonic 90 a nickel-based superalloy is machined in WEDM using a zinc-coated brass wire electrode to study its surface characteristics
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Optimizing the five magnetic abrasive finishing factors on surface quality using Taguchi-based grey relational analysis Eng. Res. Express Pub Date : 2024-03-06 Athraa Mohammed S Ahmed, Saad Kariem Shather
The effectiveness of the magnetic abrasive finishing (MAF) process relies on several factors, including the brush’s flexibility that varies across tools. This study aimed to optimize the results of five key parameters (voltage, finishing time, gap distance, rotating speed, and particle size) on surface roughness (SR) and microhardness (HV) using the grey relational analysis (GRA) method. Experimental
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Zynq SoC FPGA-based water-immersible ultrasonic instrumentation for pipe inspection and gauging Eng. Res. Express Pub Date : 2024-03-06 N Pavan Kumar, V H Patankar
A re-programmable Zynq system-on-chip (SoC) FPGA-based water-immersible 2-channel ultrasonic instrumentation has been designed and developed and it is mounted inside the IP67-grade enclosures, which is suitable for ultrasonic pipe inspection and gauging applications. The novel, compact Zynq SoC FPGA-based ultrasonic instrumentation system, powered by lithium-ion batteries for its operation over five
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Tilt-related alignment issues in miniature micromechanical on-wafer electrical probes composed of multiple flexible microcantilevers Eng. Res. Express Pub Date : 2024-03-05 Steve Arscott
Some new issues concerning the contacting and positioning of small electrical microelectromechanical systems (MEMS) probes based on multiple, flexible microcantilevers are presented here. A tilt error, associated with the lateral probe roll, means that contact touchdown occurs sequentially in different cantilevers upon increasing probe overtravel. To understand the relationship between probe overtravel
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Equivalent linearization of hyperelastic rubber rings in dynamic vibration absorber boring bar and simulation of its dynamic properties Eng. Res. Express Pub Date : 2024-03-04 Haizhao Shi, Chicheng Ma, Xinye Li, Gang Wang
A slight perturbation in high-speed precision cutting could cause violent vibration of boring bars, resulting in unexpected wear and failure of the structures. In this paper, the dynamical characteristic of a boring bar with a dynamic vibration absorber (DVA) is investigated. Considering that the nonlinear characteristics of the rubber ring play a significant role in improving the capacity of DVA,
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Enhancing unsteady heat transfer simulation in porous media through the application of convolutional neural networks Eng. Res. Express Pub Date : 2024-03-04 Mohammad Saraireh
This research describes a novel technique for anticipating unstable heat transfer in porous media. Convolutional neural networks (CNNs) are used with finite volume method (FVM) and long short-term memory (LSTM) networks to accomplish this. Heat transport networks are difficult to characterise using traditional numerical methodologies owing to their nonlinearity and complexity. The proposed solution
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A walking soft robot driven by electromagnetism inside the body Eng. Res. Express Pub Date : 2024-03-04 Yongqiang Zhu, Qiang Guo, Yuhan Zhang, Junru Zhu, Pingxia Zhang, Mingming Gao, Donglin Li, Hao Liu
Existing magnetically driven soft robots mainly rely on external electromagnetic, leading to a substantial energy consumption due to the requirement of a large external magnetic field. Moreover, the precise control of these soft robots relies on electric current, making them highly susceptible to disturbances and deviations induced by minute variations in the current. To overcome these challenges,
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Holistic evaluation of involute gear surfaces using 3D point cloud inversion Eng. Res. Express Pub Date : 2024-03-04 Anita Przyklenk, Tom Reavie, Martin Stein, Robert Frazer
Gear users desire increased performance from their products and are interested in predicting the behavior (vibration, loss, service life, etc), and gear manufacturers are interested in adjusting machining parameters to manufacture even better gears. Both require proficient metrology. The evaluation standards were originally written to classify the manufacturing capability of machine tools and as tolerances
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Enhancing oil pressure dynamics in a high-performance racing engine with innovative lubrication system tuning Eng. Res. Express Pub Date : 2024-03-01 Anand Pai, Sharanpreet Singh Virk, Dayananda Pai K, Satish Shenoy B, Suhas Yeshwant Nayak
This work focuses on fine-tuning the oil pressure dynamics of a single-seater formula car, a participant in international engineering competition organized by the Society of Automotive Engineers (SAE). Adhering to competition guidelines, the Honda CBR600RR 05-06® motorcycle engine, renowned for its 600 c.c. displacement and exceptional power-to-weight ratio, emerges as a popular choice. However, as
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Wind load analysis and cost assessment of a dual-axis stand-alone photovoltaic structure Eng. Res. Express Pub Date : 2024-03-01 Gosego Kamela, Tjiparuro Zeundjua, Matsebe Oduetse
This study investigated the effect of wind load on the structural stability of a dual axis tracking system developed at the Botswana International University of Science and Technology (BIUST). Through simulations, the study explored wind speed variations, from 8 m s−1 to 28 m s−1, while simultaneously adjusting the azimuth and elevation angles of the structure. Utilizing computational methods and numerical
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Parametric optimization corrosion erosive wear and XPS response of FeCrCoAlTiB and FeCrCoNiSiB coatings on Q235 steel substrate by HVOF spraying using taguchi method Eng. Res. Express Pub Date : 2024-03-01 Arun Kumar, Amar Patnaik, Govind Sharan Dangayach
In the study high-velocity oxy-fuel thermal spraying to create Fe32Cr21Co21Al16Ti5B5 and Fe43Cr16Co12Al14Ti5B10, Fe32Cr21Co21Ni16Si5B5 and Fe43Cr16Co12Ni14Si5B10 coatings on Q235 steel substrates. Jet-type testing is used to examine the coatings’ resistance to slurry wear. Researchers examined the surface to learn more about the erosion process. Taguchi analysis and a wear model confirm the significance
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An application of Gorilla troops optimizer in solving the problem of economic load dispatch considering valve point loading effect Eng. Res. Express Pub Date : 2024-03-01 Abdul Wadood, Abdul Ghani
Economic load dispatch (ELD) is one of the fundamental and important optimization problems in an electrical power system. The goal of the ELD problem is to minimize the overall cost of fuel used by generators while satisfying the different constraints like power balance limitations, operational capacity limits, ramp-rate limits, and prohibited operating zones and valve point loading effect (VPLE).
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Optimization of responses in single and multi-point machining processes using Dragon-fly algorithm coupled with TOPSIS and VIKOR decision-making approaches Eng. Res. Express Pub Date : 2024-02-29 Durga Venkata Prasad Ramena, Kothapalli Arun Vikram, Satya Sankara Srinivas Rao Maruvada, Jagarapu Sanjana, Avija Balaraju
Due to complex production practices, it is becoming crucial to provide greater thermal management and friction reduction in manufacturing processes. Lubricants play a crucial role by effectively reducing friction, minimizing wear and tear thereby extending the lifespan of the tool. It is observed that there is a shortage of studies associated with the machining of hard materials like Ti-6Al-4V. The
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Intelligent real-time prediction for shield machine position on the basis of BWO-LSTM-GRU Eng. Res. Express Pub Date : 2024-02-29 Liu Xuanyu, Jiang Mengting, Zhang Wenshuai, Wang Yudong
Due to the complexity and variability of shield machine working environment, it is very important to accurately control and regulate the position trajectory of shield machine. For that reason, an intelligent real-time prediction model of shield machine position based on BWO-LSTM-GRU (Beluga whale optimization-Long Short-term Memory-Gated recurrent unit) is proposed in this paper. Firstly, the real-time
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Numerical analysis of flow and combustion of Coal-Ammonia blend in coal-fired furnace Eng. Res. Express Pub Date : 2024-02-28 Simranjeet Kaur Rekhraj, Hasril Hasini
Co-firing ammonia (NH3) in coal-fired power plants presents an attractive method to expedite the global decarbonization process. Nevertheless, the challenge lies in reconciling the need for higher temperatures within the furnace with the imperative of maintaining low nitrogen oxides (NOx) emissions, which limits the widespread use of NH3 as a fuel. In this article, the flow and combustion of coal-NH3
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Fault diagnosis of tooth surface spalling based on variational mode decomposition and maximum correlation kurtosis method Eng. Res. Express Pub Date : 2024-02-28 Zhengyu Liu, Zhenbang Cheng, Yangshou Xiong
As the early fault features of tooth surface spalling are very weak and difficult to extract because of random noise and other types of signal interference, a method that combines maximum correlation kurtosis uncoiling and variational mode decomposition is proposed herein. First, a series of modes are obtained by variational mode decomposition, and the kurtosis criterion is applied to select the modes
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Manufacturing of soft capacitive strain sensor based on dielectric elastomer material for an elastic element of a jaw coupling Eng. Res. Express Pub Date : 2024-02-28 Artem Prokopchuk, Arthur Ewert, Johannes D M Menning, Andreas Richter, Berthold Schlecht, Thomas Wallmersperger, E-F Markus Henke
In this work, we present a procedure for manufacturing a soft capacitive strain sensor in the form of a multi-layer electrical capacitor for further integration into the elastic gear rim of a jaw coupling. The dielectric elastomer sensor (DES) is based on an elastomeric substrate with alternating layers of conductive carbon black based ink as electrode layers and elastomeric film as a dielectric and