Article
Computer Science, Interdisciplinary Applications
Hailun Tan, Zhicheng He, Eric Li, Aiguo Cheng, Tao Chen, Xiwen Tan, Qiqi Li, Bing Xu
Summary: This paper introduces a novel auxetic hierarchical crash box and shows that multi-objective optimization can effectively improve its performance. The application of this crash box significantly enhances the crashworthiness of electric vehicles.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Instruments & Instrumentation
Hafiz M. A. Ali, Meisam Abdi, S. Abolfazl Zahedi, Yong Sun
Summary: This study presents the design and development of a 2D auxetic filtering medium with programmable geometric features that can vary under in-plane tensile strain. The filtering medium has the ability to control particle separation. An algorithm developed in Matlab (R) determines the optimized geometry of the filtering medium based on desired particle size. An empirical relationship between in-plane tensile strain and aperture size is revealed, which can be used in mechatronic and control systems to steer the filtering medium. A prototype capable of classifying particles of specific sizes is fabricated using fused deposition modelling process. The scalable geometry configurations provide a cost-effective and efficient solution for industrial applications.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Benjamin Hanna, Rhosslyn Adams, Scott Townsend, Michael Robinson, Shwe Soe, Matthew Stewart, R. Burek, Peter Theobald
Summary: This study explored a metamaterial based on the Miura Ori folding pattern as an alternative structure for increased energy absorption in American football helmets, showing promising results in reducing linear accelerations compared to traditional elastomeric foam solutions. The use of novel deformation mechanics and the Taguchi method in evaluating 81 potential structural variations could pave the way for future research and development in protective sports equipment design.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Civil
Vu Dinh Quang, Tran Quoc Quan, Phuong Tran
Summary: This paper presents the nonlinear static buckling analysis of a magneto-electro-elastic sandwich plate on a Pasternak-type elastic foundation subjected to various loadings. The study explores the combination of an auxetic honeycomb core with negative Poisson's ratio and magneto-electro-elastic face sheets. By utilizing Reddy's theory, Galerkin method, and Bees algorithm, the stability characteristics and influencing factors of the sandwich plate were investigated.
THIN-WALLED STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Jiachang Qian, Yuansheng Cheng, Anfu Zhang, Qi Zhou, Jinlan Zhang
Summary: The study introduces a metamaterial vibration isolator with a honeycomb structure and validates its performance through finite element modeling and experiments. It proposes a multi-fidelity sequential optimization approach to accelerate the design process.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Materials Science, Composites
Yiran Niu, Xiwu Xu, Shuxiang Guo
Summary: This paper investigates the lightweight optimization of sandwich structure T-joints under side bending load, achieving a 30.75% weight reduction through methods such as self-adjusted parametric modeling and user-defined suppression process for optimizing the stacking sequence of variable-thickness composite laminates.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Zhiyang Zhang, Bo Wu, Linyan Wu, Weixing Liu, Lei Liu, Ningyu Li, Lin Cui
Summary: In this study, we improved the energy acquisition efficiency of tidal turbines with bionic airfoils by optimizing various airfoil designs. The optimized airfoils showed higher lift-drag ratios.
Article
Energy & Fuels
Aminu Yusuf, Nevra Bayhan, Abdullahi A. Ibrahim, Hasan Tiryaki, Sedat Ballikaya
Summary: In this study, the two major factors of contact resistance and Thomson heat were considered in the analysis of thermoelectric modules to optimize the maximum power output expression. The optimization results for Skutterudites thermoelectric materials operating at a maximum temperature difference of 500K showed a maximum power output of 30.1W and an energy conversion efficiency of 9.87%. Neglecting these factors can lead to an overestimation of the thermoelectric modules' output performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Mechanics
Francisco Dos Reis, Nikolaos Karathanasopoulos
Summary: This paper elaborates on a numerical method for the inverse engineering of metamaterials, which combines asymptotic homogenization schemes with genetic algorithms. The method can compute lattice unit-cell patterns that meet target performance requirements and applies to various metamaterial designs with low computational cost.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Fangdian Di, Limin Sun, Lin Chen
Summary: This study presents an optimization method for cable networks considering multiple damping effects and stiffness enhancement, using a multi-objective genetic algorithm for optimization.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Energy & Fuels
Ke Zhang, Haijing Ma, Qingyang Li, Dechang Wang, Qinglu Song, Xiaohe Wang, Xiangqiang Kong
Summary: This study focuses on the optimization and analysis of the performance of the LiBr-water variable-effect absorption-generation heat exchange (AGX) refrigeration cycle. The results show that the use of the multi-island genetic algorithm (MIGA) to optimize the solution distribution ratio and generator outlet solution concentration can significantly improve the system performance.
Article
Energy & Fuels
Yonghong Xu, Hongguang Zhang, Yifan Yang, Jian Zhang, Fubin Yang, Dong Yan, Hailong Yang, Yan Wang
Summary: This study aims to improve the fuel economy of extended range electric vehicles (EREVs) and reduce the cumulative battery workload. The research focuses on prolonging the service life of batteries and improving energy efficiency through energy management strategy (EMS). By using simulation and optimization algorithms, it is demonstrated that the cooperative operation mode based on hybrid energy storage system (HESS) can significantly improve fuel economy and reduce battery workload.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Marine
Wang Zou, Tingxu Liu, Zenghao Tang, Yongkang Shi
Summary: The supercavitating vehicle is a new generation of high-speed underwater vehicles with reduced navigation resistance by utilizing a supercavity. However, stable motion is difficult to achieve due to limited hydrodynamic forces. This study focuses on optimizing the overall shape of the vehicle to ensure stable motion and easier formation of a supercavity, using a multi-objective optimization model and an adaptive genetic algorithm. By optimizing the vehicle's characteristics and control surface parameters, design rules are established, and the motion state and hydrodynamic characteristics of the optimized vehicles are revealed.
Article
Mechanics
Liangshu Liu, Heow Pueh Lee
Summary: In the past two decades, auxetic metamaterials have been proven to have potential in various fields. Different mechanisms have been proposed for guiding their microstructure design. Recent studies have employed topology optimization, specifically using the SIMP method and MMA optimizer, to design and optimize auxetic metamaterials. The simulation results confirmed the negative Poisson's ratio, and the optimized layout also achieved additional narrow locally resonant bandgaps in addition to broadening and lowering the initial configuration's bandgap.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Energy & Fuels
Wen-Wen Zhang, Hong Qi, Zhi-Qiang Yu, Ming-Jian He, Ya-Tao Ren, Yang Li
Summary: The study introduces the MIGA method for optimizing the configuration of selective solar absorbers, achieving high solar absorptance and low emittance. The absorber exhibits great characteristics such as polarization independence and angle insensitivity due to hybrid resonance modes of Wood's anomaly, surface plasmon polariton, and magnetic polariton.
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)