Article
Computer Science, Interdisciplinary Applications
L. M. Anaya-Jaimes, W. M. Vicente, R. Pavanello
Summary: This work presents a Bi-directional Evolutionary Structural Optimization (BESO) based methodology for designing orthotropic metamaterials with a specific thermal expansion coefficient. The proposed method stabilizes the evolutionary process using material interpolation and numerical strategies and uses the homogenization method to obtain the equivalent thermal expansion properties of the designed materials.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Mechanics
Lei Zhao, Bin Xu, Yongsheng Han, Jianhua Rong
Summary: This paper proposes a concurrent topology optimization method that considers dynamic stress response of both macrostructural material distribution and periodic microstructure under random excitations. A new relaxation method is introduced to establish a relationship between dynamic stress limit and mechanical properties for ensuring macrostructure safety. The optimization problem is solved using the bi-directional evolutionary structural optimization (BESO) method, with sensitivities of dynamic stress response derived for design variables at macro and micro scales. Multiple numerical examples are presented to demonstrate feasibility and effectiveness of the proposed method.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Sumudu Herath
Summary: This paper presents an energy based method for stochastic optimization of the orthotropic material orientation of deformable thin-shells. A closed form equation is derived to express the 3-dimensional orthotropic material parameters in any given spatial direction, simplifying the calculation process. This generalized material model is then used in a stochastic nonlinear optimization algorithm to minimize the strain energy with respect to the material orientations. Illustrative examples are provided to demonstrate the numerical convergence and accuracy of the proposed method.
MECHANICS RESEARCH COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Yongfeng Zheng, Yingjun Wang, Zhen Luo, Xiang Lu, Jinping Qu
Summary: This study introduces a novel method for the robust design of structures and material microstructures, utilizing orthogonal decomposition, uniform sampling, and polynomial chaos expansion to handle uncertainties. An evolutionary method is employed to find the optimal topology, and a dimensionless index is defined to evaluate the robustness of deterministic and robust designs.
MATERIALS & DESIGN
(2021)
Article
Computer Science, Interdisciplinary Applications
Rodrigo L. Pereira, Heitor N. Lopes, Marcio S. Moura, Renato Pavanello
Summary: This study presents a multi-domain acoustic topology optimization approach for the design of reactive and dissipative expansion chamber mufflers. The proposed method utilizes the Bi-directional Evolutionary Structural Optimization (BESO) algorithm and a novel material interpolation scheme, considering acoustic, porous, and rigid domains during the optimization process. Results show that this method significantly enhances the mean value of sound Transmission Losses (TL) in a broad frequency range, as well as presenting clear optimized partitions.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Engineering, Civil
Khodamorad Nabaki, Jianhu Shen, Xiaodong Huang
Summary: Fatigue, an important failure criterion in engineering problems, has been considered in topology optimization. Different optimal topologies have been obtained based on different fatigue criteria. This paper explores the effect of different fatigue criteria on optimal designs using bi-directional evolutionary structural optimization and a modified p-norm approach. The results provide useful reference for engineers to design structures to avoid high frequency fatigue failure.
ENGINEERING STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
Heitor Nigro Lopes, Jarir Mahfoud, Renato Pavanello
Summary: This study focuses on topology optimization and wave propagation analysis of frequency separation interval in continuous elastic bi-dimensional structures in the high-frequency domain. The algorithm, based on BESO, considers multiple modes by using weighted natural frequency. The optimized structural topologies are well-defined, with satisfactory natural frequency separation intervals.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Chemistry, Physical
Xianjie Wang, Fan Zhang, Yang Zhao, Zhaoyi Wang, Guangen Zhou
Summary: This paper studies the integrated method of node optimization design and manufacturing, and proposes an improved algorithm to solve the problem of complex manufacturing due to topology optimization. The feasibility of this method is verified through multi-software integration optimization and manufacturing, and good calculation results are obtained.
Article
Engineering, Multidisciplinary
Zeng Meng, Liangbing Guo, Bowei Huang, Shanhong Ren, Shan Xiao
Summary: This study performs topology optimization design of carbon nanotube (CNT) orientation and material layout for carbon nanotube-reinforced composites (CNTRCs) for the first time. A 3D concurrent optimization model is constructed by considering two independent angle variables. A discrete interval method is proposed to decrease the possibility of falling into local optimal solutions. The proposed method is effective and achieves the optimal balance between structural stiffness and economy.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Mechanical
Murthy N. Guddati, Timothy F. Walsh
Summary: This paper addresses the problem of inverting orthotropic materials from mechanical responses and presents two approaches for parametrizing the modulus tensor. Cholesky parametrization may be better for overall orthotropic inversion, while Alpha parametrization may be more suitable for specific cases. The computational cost is similar for both parametrizations.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Civil
Shiming Liu, Bin Huang, Yi Min Xie
Summary: This study evaluates the effects of longitudinal and transverse curvatures on the optimal design of steel shell footbridges. Results show that both longitudinal and transverse curvatures have a significant impact on the optimized designs, with mean compliance increasing with the transverse curvature radius and exhibiting a decrease then increase trend with the longitudinal curvature radius.
STRUCTURAL ENGINEERING AND MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Georgios Kazakis, Nikos D. Lagaros
Summary: This research aims to provide a simplified MATLAB code to address the challenge of multi-scale concurrent topology optimization. By utilizing the Bi-directional Evolutionary Structural Optimization (BESO) method, it optimizes both the macro-scale and micro-scale simultaneously, taking into account their interactions and interdependencies. This advancement is significant in the field of topology optimization and enhances its applications across various engineering disciplines.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Xiangrong Song, Dongyang Sun, Xuefeng Liang
Summary: This paper proposes a design method for a validation experiment to determine the ability of a deterioration model to simulate the actual deterioration process. A normalized area metric based on probability density functions is developed for validation results quantification. A design method for the validation experiment is also proposed using collaborative optimization and Latin hypercube sampling.
Article
Computer Science, Interdisciplinary Applications
Bin Xu, Yongsheng Han, Lei Zhao
Summary: This paper extends current concepts of topology optimization to the design of structures made of nonlinear materials by proposing an extended BESO method. The method effectively avoids singularity problems in density-based methods and improves convergence through sensitivity and topological variable filters. The effectiveness of the proposed method is demonstrated through several 2D benchmark design problems.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Yanfa Wu, Wenke Qiu, Liang Xia, Wenbiao Li, Kai Feng
Summary: This work improves a previous stress-constrained topology optimization method and applies it to a typical aircraft engine bracket design problem. The improved method uses a more efficient and versatile self-adaptive scheme for determining the Lagrange multiplier, resulting in a bracket design that outperforms the original in terms of weight, stiffness, and strength.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Multidisciplinary
Yafeng Chen, Fei Meng, Jie Zhu, Xiaodong Huang
Summary: The study introduces a BESO method to design photonic topological insulators with topological edge and corner states. By optimizing the photonic crystal, a topological phase transition is achieved to form highly localized edge and corner states. This new design route paves the way for practical applications.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Mathematics, Applied
Jie He, Song Yao, Xiaodong Huang
Summary: This study proposes a topology optimization approach to design poroelastic cores of sandwich structures for sound insulation, which can distribute poroelastic material evenly within the design domain but slightly sacrifice the sound insulation performance. The results show that optimized periodic cores of sandwiches make the poroelastic material to be distributed evenly within the design domain but slightly scarify the sound insulation performance.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2022)
Article
Engineering, Multidisciplinary
Yongsheng Han, Bin Xu, Zunyi Duan, Xiaodong Huang
Summary: This paper proposes a topology optimization method for multi-material structures with graded interfaces to minimize the maximum von Mises stress. The method uses a filter-based approach to determine the locations and widths of the interfaces, and employs an extended Bi-directional Evolutionary Structural Optimization (BESO) method to avoid stress singularity. The effectiveness of the proposed method is validated through benchmark numerical examples.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Haoqing Ding, Bin Xu, Zunyi Duan, Weibai Li, Xiaodong Huang
Summary: This paper proposes a cascading multilevel optimization framework for fiber-reinforced composite structures, using non-uniform rational basis spline (NURBS) surfaces. The framework allows for control of structural topology, fiber angle distribution, and improves computational efficiency. By formulating and solving the optimization problem successively from a coarse mesh level to the finest mesh level, the computational cost is reduced while maintaining the design freedom and resolution. The NURBS surface also improves the continuity of local fiber angles and avoids the checkerboard phenomenon.
ENGINEERING WITH COMPUTERS
(2023)
Review
Materials Science, Multidisciplinary
Jiahui Li, Yvonne Durandet, Xiaodong Huang, Guangyong Sun, Dong Ruan
Summary: This paper comprehensively reviews the mechanical properties and deformation mechanisms of discontinuous and continuous fiber-reinforced composites fabricated by various additive manufacturing techniques. The effects of fiber type, orientation, weight/volume fraction, printing path, and stacking sequence on the mechanical properties of additively manufactured composites are discussed. Additionally, the applications of additively manufactured composites, the main challenges of current additive manufacturing techniques, and recommendations for future work are presented.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Mechanics
Weibai Li, Xiaodong Huang
Summary: This paper develops a topology optimization algorithm for lightweight design of structures using multiple cellular materials. The algorithm incorporates the microstructures and homogenized mechanical properties of cellular materials into topology optimization. Numerical examples demonstrate the successful implementation of the algorithm by optimizing the distribution and selection of multiple cellular materials.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Fei Meng, Zhi-Kang Lin, Weibai Li, Peiguang Yan, Yun Zheng, Xinping Li, Jian-Hua Jiang, Baohua Jia, Xiaodong Huang
Summary: This study demonstrates the discovery of 2D surface states described by spin-1 Dirac equations at the interfaces between two sonic crystals with distinct topology but the same crystalline symmetry. The Dirac mass of these surface states can be tuned by the geometry of the crystals. The study also confirms the existence of zero refractive index behavior and emergent topological hinge states.
Article
Engineering, Multidisciplinary
Xiaodong Huang, Weibai Li
Summary: This paper proposes a three-field floating projection topology optimization (FPTO) method using linear material interpolation. The method enhances the formation of structural topology and can be extended to robust formulation. The effectiveness and advantage of the proposed method are demonstrated through numerical examples.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Mechanics
Xiaolei Yan, Minchao Lai, Dengfeng Huang, Yong Zhang, Xiaodong Huang
Summary: This paper proposes a manufacturing-oriented topology optimization method for designing continuous fiber reinforced composite structures. The method optimizes both the fiber content and fiber orientation, achieving a smooth design with explicit boundary. To improve manufacturability, a fiber placement path fitting method based on the potential flow theory is proposed and embedded in the optimization procedure.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Tianbao Liang, Mu He, Hao-Wen Dong, Liang Xia, Xiaodong Huang
Summary: This research proposes a novel design strategy for ultrathin and highly efficient waterborne reflective pentamode metasurfaces to achieve uniform diffuse reflections in underwater scenes. A theoretical model is established to ease the demand on impedance matching and construct an ideal diffusion field. The spatially variant equivalent impedances of the metasurface are identified, and their corresponding pentamode material configurations are inversely designed with band structure analyses. Numerical results show high performance at the targeted frequency, and further verifications reveal applicability to a broader frequency range, paving the way for deep subwavelength scale acoustic wave manipulations with ultrathin waterborne metasurfaces.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Manufacturing
Verena Wulf, Ada Pui-yan Hung, Adi Hendler-Neumark, Weibai Li, Olga Shamis, Michael Gozin, Xiaodong Huang, Alan Kin Tak Lau, Gili Bisker
Summary: Noise pollution poses a threat to health and well-being, and its prevalence has been increasing. Incorporating fluorescent single-walled carbon nanotubes (SWCNTs) into epoxy resins can improve their sound-dampening capabilities. The DNA-SWCNT/epoxy composites showed the highest transmission loss, with an 18% improvement compared to epoxy alone, and the optimal concentration of DNA-SWCNT was found to be 2 mg L-1. Additionally, the near-infrared fluorescence of SWCNTs was utilized to characterize their distribution within the epoxy resin.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Civil
Khodamorad Nabaki, Jianhu Shen, Xiaodong Huang
Summary: Fatigue, an important failure criterion in engineering problems, has been considered in topology optimization. Different optimal topologies have been obtained based on different fatigue criteria. This paper explores the effect of different fatigue criteria on optimal designs using bi-directional evolutionary structural optimization and a modified p-norm approach. The results provide useful reference for engineers to design structures to avoid high frequency fatigue failure.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Mechanical
Xi Zhang, Xiaodong Huang, Guoxing Lu
Summary: In this study, a novel perforated Miura-ori phononic structure (PMPS) is introduced, and the tunability of complete or partial bandgaps in specific directions is investigated. The validity of the bandgaps is verified through simulation and experimental measurement of sound transmission loss in a three-dimensional printed Miura-ori panel. The results demonstrate extensive bandgap tunability of PMPS with different design parameters during deployments and folds. Additionally, potential applications of PMPS, such as programmable acoustic waveguides, are demonstrated. Lightweight PMPSs offer an attractive alternative for designing tunable, programmable, and reconfigurable acoustic structures, including sound waveguides, sound barriers, and broadband wave tailors.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Gengwang Yan, Yingli Li, Xiaodong Huang, Song Yao, Wenxi Zhou
Summary: A multi-objective topological optimization method for elastic metaplates (EMPs) is proposed, combining the non-dominated sorting genetic algorithm-II (NSGA-II) and the improved fast plane wave expansion method (IFPWEM) to achieve high efficiency and accuracy in lightweight and bandgap characteristics. The results show that initial designs with concentrated scatterers can produce more structurally diverse Pareto front solutions. The appropriate mesh resolution and number of iterations are determined based on convergence and computational costs. A post-processing method is proposed to improve manufacturability and achieve convergence earlier, and the method demonstrates improved bandgap characteristics compared to conventional unit cells.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Tao Xu, Xiaodong Huang, Xiaoshan Lin, Yi Min Xie
Summary: In this study, an innovative algorithm that utilizes a linear material interpolation scheme is introduced to maximize the buckling resistance of structures. The linear material model offers advantages such as eliminating the need to select penalization schemes and penalty values, facilitating straightforward sensitivity analysis, and removing the ambiguous physical meaning of penalization for the stress stiffness matrix. The proposed approach is supported by examples, demonstrating its effectiveness and efficiency.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
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)
