Computers & Structures最新文献

{"title":"Micromechanical and numerical analysis of shape and packing effects in elastic-plastic particulate composites","authors":"M. Majewski","doi":"10.1016/j.compstruc.2025.107744","DOIUrl":"10.1016/j.compstruc.2025.107744","url":null,"abstract":"<div><div>The purpose of this study is to inspect the combined effect of reinforcement shape and packing on the macroscopic behaviour of particulate composites. The introduced micromechanical approach modifies the Morphologically Representative Pattern scheme with the Replacement Mori–Tanaka Model. The statistical volume elements have randomly placed inclusions with a selected shape. Four shapes of inhomogeneities are studied: a sphere, a prolate spheroid, three prolate spheroids crossing at right angles, and a drilled spheroid. The concentration tensors of non-ellipsoidal inhomogeneities are found numerically using simple simulations of a single particle. The extension to the regime of non-linear material behaviour is performed by employing the tangent or secant incremental linearization of the material response. The results are compared with the outcomes of numerical simulations and predictions of the classical mean-field models based on the Eshelby solution, e.g., the Mori–Tanaka model or the Self-Consistent scheme. It is found that the proposed modification of the Morphologically Representative Pattern approach can be used as an alternative to computational homogenization in the case of elastic-plastic composites with different shapes and packings of particles.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"313 ","pages":"Article 107744"},"PeriodicalIF":4.4,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The complete hydrostatic stiffness and geometrically nonlinear beam finite element analysis of floating structures","authors":"Ikjae Lee,&nbsp;Moohyun Kim","doi":"10.1016/j.compstruc.2025.107738","DOIUrl":"10.1016/j.compstruc.2025.107738","url":null,"abstract":"<div><div>In this study, the complete hydrostatic tangent stiffness for geometrically nonlinear beam finite element model is introduced. Based on consistent global hydrostatic restoring stiffness analysis, the complete form of hydrostatic tangent stiffness is developed. In addition, a surface integration parameterization method for shear-deformable beams is discussed with classifications of two special types of cross-sections, i.e., elliptical and rectangular. The presence of rigid-body load stiffness (RBLS) complementing the lacking part of geometric stiffness is observed and found to be essential to fulfill objectivity of the hydrostatic tangent stiffness. The developed method is validated with well-established cantilever quadrant and deployable ring examples and then applied to various nonlinear hydrostatic problems for floating structures including floating spheres, rigid and flexible box-barges and fish-cage collars.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"313 ","pages":"Article 107738"},"PeriodicalIF":4.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel generative adversarial networks based multi-scale reconstruction method for porous rocks","authors":"Nan Xiao ,&nbsp;Yu Peng ,&nbsp;Xiaoping Zhou","doi":"10.1016/j.compstruc.2025.107745","DOIUrl":"10.1016/j.compstruc.2025.107745","url":null,"abstract":"<div><div>The traditional reconstruction methods for numerical rock models, such as simulated annealing reconstruction method, have disadvantages, such as unclear details of the generated structure and the need of prior functions. Therefore, this paper attempts to introduce GANs-based techniques to reconstruct numerical porous rock models. The introduction of GANs-based techniques can solve the problem of requiring prior functions before reconstruction and can improve the clarity and richness of the generated reconstruction models in terms of details. First, compression and computer tomography tests are conducted to obtain the necessary parameters. Then, the generative adversarial network (GAN) method is introduced to propose the novel multi-scale reconstruction method. Later, the GAN reconstruction method is used to generate multi-scale structures of rocks. After, the equivalence in statistics between the reference and reconstructed model is verified by the two-point probability distribution function. The equivalence in topology between the reference and reconstructed model is verified by the modified skeleton algorithm, and the equivalence in mechanical property between the reference and reconstructed model is verified by the numerical results. The verifications also show that this proposed novel multi-scale reconstruction method has great potential in engineering applications.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"313 ","pages":"Article 107745"},"PeriodicalIF":4.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “The microlayer model: A novel analytical homogenisation scheme for materials with rigid particles and deformable matrix - applied to simulate concrete” [Comput. Struct. 293 (2024) 107258]","authors":"Jakob Platen ,&nbsp;Johannes Storm ,&nbsp;Sven Bosbach ,&nbsp;Martin Claßen ,&nbsp;Michael Kaliske","doi":"10.1016/j.compstruc.2025.107733","DOIUrl":"10.1016/j.compstruc.2025.107733","url":null,"abstract":"","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"312 ","pages":"Article 107733"},"PeriodicalIF":4.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Near-fault ground motion synthesis based on conditional generation adversarial network","authors":"Guobin Lin,&nbsp;Xiaobin Hu","doi":"10.1016/j.compstruc.2025.107740","DOIUrl":"10.1016/j.compstruc.2025.107740","url":null,"abstract":"<div><div>Near-fault (NF) ground motions usually have high-amplitude and long-period velocity pulses that might cause excessive responses in flexible structures. However, the number of recorded NF ground motions is very limited and hinders related research in earthquake engineering. In this paper, we develop a conditional generative adversarial network (CGAN) model, namely Ep2NgmGAN, to generate NF ground motions under given engineering parameters. Different from the traditional CGAN model, it inputs the label by introducing a label embedding module. In addition, a knowledge-enhanced module is adopted to enable the model to capture prior knowledge about NF ground motions. Using the strategy suggested in this study, the Ep2NgmGAN is trained and tested on the dataset constructed using the recorded NF ground motions and generated ones based on a mathematical method. Finally, numerical experiments and comparative investigations are carried out to comprehensively evaluate the performance of Ep2NgmGAN. The results indicate that the label embedding module is more suitable to deal with the continuous labels and the knowledge-enhanced module makes the model better learn the prior knowledge. In comparison to the representative mathematical methods, the Ep2NgmGAN has much higher efficiency and better or comparable accuracy, making it an appealing tool for NF ground motion synthesis.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"313 ","pages":"Article 107740"},"PeriodicalIF":4.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large strain and 3D stress analysis of laminated fiber-reinforced soft material structures with high order beam finite elements","authors":"Piero Chiaia ,&nbsp;Alfonso Pagani ,&nbsp;Erasmo Carrera","doi":"10.1016/j.compstruc.2025.107735","DOIUrl":"10.1016/j.compstruc.2025.107735","url":null,"abstract":"<div><div>This study explores the capabilities of higher-order beam models within the Carrera Unified Formulation (CUF) framework for the large strain analysis of multilayered hyperelastic structures made of fiber-reinforced material. These materials exhibit complex mechanical behavior described by both geometrical and material nonlinearities. The proposed approach leverages the strengths of CUF, which allows for the definition of higher-order beam finite elements (FE) whose formal expression is an invariant of the structural theory adopted. The governing equations of the nonlinear static analysis are carried out by the Principle of Virtual Displacements (PVD) in a resulting pure displacement-based formulation. The nonlinear governing equations are written in matrix form in terms of Fundamental Nuclei (FN) of the internal and external force vectors and tangent stiffness matrix. The problem is solved through a Newton–Raphson linearization procedure coupled with path-following methods. The results show the capabilities of higher-order models in terms of accuracy and computational costs in predicting accurate displacements, strains, and detailed 3D stress distributions at large strain. The proposed results are compared with the FE solution obtained through classical models available in commercial software.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"313 ","pages":"Article 107735"},"PeriodicalIF":4.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Static and dynamic analysis of doubly-curved functionally graded porous nanoshells integrated with piezoelectric surface layers and flexoelectric effect","authors":"Tran Van Ke ,&nbsp;Phung Van Minh ,&nbsp;Do Van Thom ,&nbsp;Nguyen Dinh Duc","doi":"10.1016/j.compstruc.2025.107737","DOIUrl":"10.1016/j.compstruc.2025.107737","url":null,"abstract":"<div><div>This study employs the finite element method based on nonlocal elasticity theory to model and analyze static bending, free oscillation, and transient responses of doubly-curved sandwich nanoshells with a functionally graded porous (FGP) core layer and integrated with piezoelectric surface layers resting on a Pasternak-elastic medium. The doubly-curved sandwich nanoshell comprises three layers, including a FGP core layer and two surface layers of piezoelectric material, taking into account the flexoelectricity effect. The notable novelty of this study is that it considers the nonlocal coefficients varying along the thickness direction as mechanical properties of the material. The Lagrangian and Hermite functions are employed to approximate a quadrilateral element with four-nodes, each of which has eight degrees of freedom based on an improved higher-order shear strain hypothesis. These functions are employed to generate the stiffness matrices, mass matrices, and force vectors of the shell in conjunction with different forms of curved shells and boundary conditions. A comprehensive study to evaluate the influence of coefficients such as flexoelectric effect, radius of curvature, nonlocal coefficient, elastic matrix stiffness parameters, porosity parameters, and geometric shapes on the static bending, free oscillation, and transient responses of the doubly-curved sandwich nanoshell with rectangular and circular planforms.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"312 ","pages":"Article 107737"},"PeriodicalIF":4.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the damage effect of 12.7 mm armour piercing incendiary projectile penetrating aramid reinforced concrete slab","authors":"Zhen Gao ,&nbsp;Zhenqing Wang ,&nbsp;Yeqing Chen ,&nbsp;Shutao Li ,&nbsp;Lumeng Li ,&nbsp;Longming Chen ,&nbsp;Chenglong Huang ,&nbsp;Qingyuan Yang","doi":"10.1016/j.compstruc.2025.107706","DOIUrl":"10.1016/j.compstruc.2025.107706","url":null,"abstract":"<div><div>The resilience of reinforced concrete to local damage and penetration has been a subject of interest for many decades. In recent years, aramid fibres and composite laminates have emerged as high-performance engineering materials that are widely used in protective structures. In this paper, four kinds of specimens of reinforced concrete (RC), aramid fiber reinforced concrete (AFRC), aramid fiber reinforced plastic reinforced concrete and aramid fiber reinforced plastic reinforced concrete were made, and the failure characteristics and penetration resistance of different members were analyzed and compared through the impact test of 12.7 mm armor piercing incendiary bomb. Moreover, the finite element model was established and subsequently validated by the test results. A numerical simulation was employed to analyze the structural failure modes resulting from the impact of varying projectile velocities. The underlying mechanism by which the damage is caused can be observed by monitoring the propagation of stress waves. A dimensional analysis method was employed to fit the empirical formula relating the failure characteristics of reinforced concrete slabs (residual velocity, crater diameter, crater depth) and initial velocity. The impact of three key parameters on the penetration resistance of the composite structure was investigated, including the strength grade of concrete, the thickness of the aramid layer and the varying thickness ratio of concrete/aramid at a consistent surface density. The experimental and numerical simulation results show that aramid fiber reinforced concrete structures cannot improve the penetration resistance of the slab. The penetration resistance of reinforced concrete slabs reinforced with aramid laminates on the back is better than that of ordinary concrete slabs. Furthermore, the area density of the composite target plate is optimised when the thickness ratio of the reinforced concrete/aramid layer d_C/d_A is equal to 2. This configuration exhibits the most efficient anti-penetration characteristics. The research results can be used as one of the basis for the optimization design of high-efficiency protective structure of composite structure.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"312 ","pages":"Article 107706"},"PeriodicalIF":4.4,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupling approaches to simulate dynamic wind effects on a membrane structure with ponding water","authors":"N. Kodunthirappully Narayanan ,&nbsp;R. Wüchner ,&nbsp;J. Degroote","doi":"10.1016/j.compstruc.2025.107699","DOIUrl":"10.1016/j.compstruc.2025.107699","url":null,"abstract":"<div><div>This paper proposes two coupling approaches to simulate the effect of wind loads on membrane structures loaded with water ponds. The first method couples a two-phase solver, simulating the wind–water system, with a structural solver, simulating the membrane structure. This is a relatively straightforward approach applied to a new application and it can be considered excessive because the water only occupies a fraction of the wind domain. Therefore, a novel approach is proposed which uses different solvers and domain sizes to simulate the effect of the wind, water and membrane structure. The main assumption in this method is that the wind–water interaction is negligible compared to their interactions with the membrane structure. This approach strongly couples the structural solver with the wind and the water solver where in every coupling iteration forces from both fluid solvers are added and applied. On the other hand, the structural solver provides the displacement to both fluid solvers. The main advantage of this method is that it makes the simulation modular. It was found that neglecting the interaction between the wind and water did not cause significant deviation in the results while the computation was more efficient than the first approach.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"312 ","pages":"Article 107699"},"PeriodicalIF":4.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling woven composites with shell elements: An application of second-order computational homogenisation","authors":"Athira Anil Kumar,&nbsp;Aewis K.W. Hii,&nbsp;Stephen R. Hallett,&nbsp;Bassam El Said","doi":"10.1016/j.compstruc.2025.107736","DOIUrl":"10.1016/j.compstruc.2025.107736","url":null,"abstract":"<div><div>3D woven composites are gaining traction in the aerospace industry due to their enhanced mechanical properties. However, their complex internal architectures pose challenges in understanding their behaviour across different length scales. Computational homogenisation techniques emerge as a practical alternative to high-fidelity modelling, facilitating analysis on the structural scale. While the classical first-order homogenisation framework is well-established, it has limitations that are addressed by higher-order approaches such as second-order homogenisation. These advanced approaches incorporate strain gradients and higher-order deformation modes into fine-scale models, proving effective in bending-dominated problems. The current study implements a thick shell-based second-order homogenisation framework to multi-layer 2D and 3D woven composites. It underscores the framework’s proficiency in providing accurate constitutive relations for bending components. Through simulation of ASTM standardised tests, comparative studies are conducted for first and second-order homogenisation against high-fidelity models, which not only demonstrates their effectiveness but also identifies their limitations.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"312 ","pages":"Article 107736"},"PeriodicalIF":4.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}