Computers & Structures最新文献

Proper generalized decomposition surrogate modeling with application to the identification of Rayleigh damping parameters 适当的广义分解代理模型及其在瑞利阻尼参数识别中的应用

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-29 DOI: 10.1016/j.compstruc.2025.107826

Clément Vella , Serge Prudhomme

引用次数: 0

Efficient parametric model order reduction in contact mechanics 接触力学中有效的参数模型降阶

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-27 DOI: 10.1016/j.compstruc.2025.107838

Ganesh S. Pawar, Salil S. Kulkarni

{"title":"Efficient parametric model order reduction in contact mechanics","authors":"Ganesh S. Pawar, Salil S. Kulkarni","doi":"10.1016/j.compstruc.2025.107838","DOIUrl":"10.1016/j.compstruc.2025.107838","url":null,"abstract":"<div><div>Contact problems are inherently non-linear and present significant computational challenges in simulations. Traditional proper orthogonal decomposition-based non-linear system reduction often proves inefficient due to the complexity of handling full-scale models. This article presents a generalized parametric model order reduction framework tailored for dynamic contact problems involving arbitrarily-shaped inclusions, incorporating various specialized approaches. The proposed framework features a two-tier reduction process: the first tier applies a proper orthogonal decomposition-based model order reduction approach, while the second tier employs either the discrete empirical interpolation method or energy conserving sampling and weighting to address the reduction of non-linear terms. Discrete empirical interpolation method identifies nodes in contact as indices for the reduction of non-linear terms, and energy conserving sampling and weighting highlight contact elements as the most contributing elements to virtual work associated with non-linear forces. These results align with physics of the problem, as in this article, everything is linear except for the contact non-linearity. Two construction strategies are evaluated: one utilizing a single global basis and another using interpolated local bases. The framework leveraging local bases interpolation on the tangent space to the Grassmannian manifold demonstrates better accuracy compared to the global basis approach. The effectiveness of the different approaches within the generalized parametric model order reduction framework is evaluated through standard 2D dynamic contact problems involving perfectly bonded inclusions.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"315 ","pages":"Article 107838"},"PeriodicalIF":4.4,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137285","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}

引用次数: 0

Time homogenization: An acceleration scheme for phase-field modeling of fatigue 时间均匀化：疲劳相场建模的一种加速方案

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-24 DOI: 10.1016/j.compstruc.2025.107824

Rodolfo Pina-Torres, Dong Zhao, Johannes Storm, Michael Kaliske

{"title":"Time homogenization: An acceleration scheme for phase-field modeling of fatigue","authors":"Rodolfo Pina-Torres, Dong Zhao, Johannes Storm, Michael Kaliske","doi":"10.1016/j.compstruc.2025.107824","DOIUrl":"10.1016/j.compstruc.2025.107824","url":null,"abstract":"<div><div>This study proposes a novel time homogenization scheme designed for phase-field formulations in fatigue fracture analysis. Inspired by the methodologies for evaluating the long-term behavior of asphalt pavements, this study builds upon a phase-field formulation that accounts for material degradation due to fatigue and the Representative Crack Element formulation as an energy split. The novelty of this approach lies in its application of a methodology based on computational homogenization to fracture mechanics. The time homogenization accelerates the simulation by upscaling micro-scale behaviors over extended macro-time periods. Through comparisons between high-fidelity simulations and those employing the homogenization scheme, the study evaluates the potential and accuracy of the approach. Numerical examples demonstrate the model’s effectiveness in capturing crack growth under diverse loading conditions. While the homogenized model approximates damage progression observed in detailed simulations, it exhibits a delay in response during advanced stages of crack propagation, suggesting areas for further refinement. Overall, this research validates time homogenization within phase-field formulations as a tool for fracture analysis. Further model potential is discussed and necessary development for the time homogenization method is concluded, setting the stage for future development and optimization efforts.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"315 ","pages":"Article 107824"},"PeriodicalIF":4.4,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130813","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}

引用次数: 0

Vershinin–Bai–Wierzbicki plastic model for mild steel and accurate prediction of structural plastic response and failure behavior 低碳钢的Vershinin-Bai-Wierzbicki塑性模型及结构塑性响应和破坏行为的精确预测

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-22 DOI: 10.1016/j.compstruc.2025.107834

Ya-Chao Hu , Feng Xi , Feng Liu , Ying-Hua Tan

{"title":"Vershinin–Bai–Wierzbicki plastic model for mild steel and accurate prediction of structural plastic response and failure behavior","authors":"Ya-Chao Hu , Feng Xi , Feng Liu , Ying-Hua Tan","doi":"10.1016/j.compstruc.2025.107834","DOIUrl":"10.1016/j.compstruc.2025.107834","url":null,"abstract":"<div><div>The isotropic plastic hardening behavior of ductile metals is commonly characterized by the accumulated equivalent plastic strain. Advanced plasticity models further incorporate dependencies on hydrostatic pressure and Lode angle to more accurately represent material behavior under complex stress states. However, such models have rarely been applied to mild steels or structural failure analyses. This study evaluates the applicability of the Vershinin–Bai–Wierzbicki (VBW) model to mild steel, such as Q235 in China. Constitutive parameters are calibrated using a parameter identification approach that integrates inverse modeling with multi-objective optimization. Computational results of the VBW and Mises models are compared, with particular attention to differences in the large-deformation plastic stage. In addition, the VBW model incorporating the Lode angle-modified void growth model (LMVGM) is evaluated for its capability to predict fracture behavior and structural failure responses. Simulation results indicate that plastic deformation and fracture behavior of mild steel under large strains are highly sensitive to stress triaxiality and Lode angle. The conventional Mises model fails to accurately capture plastic evolution influenced by these stress-state parameters, whereas the VBW model, coupled with LMVGM, provides accurate predictions of both large-strain plasticity and fracture responses in mild steel materials and structures.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"315 ","pages":"Article 107834"},"PeriodicalIF":4.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107664","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}

引用次数: 0

Time-domain dynamic analysis of structures equipped with fractional viscoelastic solid and fluid dampers via improved pseudo-force approach 基于改进伪力法的分数阶粘弹性固体和流体阻尼器结构时域动力分析

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-22 DOI: 10.1016/j.compstruc.2025.107816

Federica Genovese , Giuseppe Muscolino

{"title":"Time-domain dynamic analysis of structures equipped with fractional viscoelastic solid and fluid dampers via improved pseudo-force approach","authors":"Federica Genovese , Giuseppe Muscolino","doi":"10.1016/j.compstruc.2025.107816","DOIUrl":"10.1016/j.compstruc.2025.107816","url":null,"abstract":"<div><div>A numerical method for the time-domain dynamic analysis of structures with viscoelastic energy dissipation dampers, modeled using fractional derivatives, is presented. Two fractional viscoelastic models are considered: the <em>fractional Kelvin-Voigt model</em> and another one referred to here as the <em>fractional simplified Maxwell model</em>, to distinguish it from the widely used fractional Maxwell model, where two fractional derivatives appear. In the context of the co<em>nvolution integral method</em> in state variables, the proposed approach, called the <em>improved pseudo-force method</em> involves: <em>i</em>) discretization offractional derivatives using the <em>Grünwald-Letnikov approximation</em>; <em>ii</em>) piecewise linear interpolation of both the excitation function and the pseudo-force; <em>iii</em>) evaluation of the response in the modal subspace through recursive relations, using operators computed only at the beginning of the procedure; <em>iv</em>) evaluation of the nodal response by the modal superposition method. The accuracy and stability of the method are demonstrated through applications to a Single-Degree-of-Freedom (SDoF) oscillator and a five-story building equipped with viscoelastic dampers.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"315 ","pages":"Article 107816"},"PeriodicalIF":4.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107663","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}

引用次数: 0

Multi-vehicle responses for high-resolution bridge mode shape identification integrating Kalman filter and compressive sensing 基于卡尔曼滤波和压缩感知的高分辨率桥梁模态振型多车响应识别

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-21 DOI: 10.1016/j.compstruc.2025.107837

Yi He , Judy P. Yang

{"title":"Multi-vehicle responses for high-resolution bridge mode shape identification integrating Kalman filter and compressive sensing","authors":"Yi He , Judy P. Yang","doi":"10.1016/j.compstruc.2025.107837","DOIUrl":"10.1016/j.compstruc.2025.107837","url":null,"abstract":"<div><div>This study introduces a three-step procedure for identifying high-resolution bridge mode shapes using responses from a limited number of test vehicles. First, contact-point displacements are retrieved from the vehicle responses using the generalized Kalman filter with unknown input algorithm. Second, the sparse bridge response matrix, populated with contact-point displacements, is completed using the spatial compressive sensing theory. Third, high-resolution mode shapes are extracted by applying singular value decomposition in the completed response matrix. An illustrative example shows that the first two mode shapes of a 60-m bridge can be well identified using the responses of eight test vehicles, achieving a spatial resolution of 0.5 m. The performance of the procedure is further evaluated by considering practical factors, including bridge boundary conditions, environmental noises, and the number of test vehicles. Additionally, the subtraction strategy has successfully removed the effect of pavement irregularity for mode shape construction. The capability of the procedure for accurately and effectively identifying the high-resolution bridge mode shapes is therefore demonstrated.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"315 ","pages":"Article 107837"},"PeriodicalIF":4.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107662","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}

引用次数: 0

3D-printed concrete fracture: Effects of cohesive laws, mixes, and print parameters in 3D eXtended FEM 3D打印混凝土断裂：三维扩展有限元中内聚规律、混合料和打印参数的影响

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-19 DOI: 10.1016/j.compstruc.2025.107822

Faisal Mukhtar

{"title":"3D-printed concrete fracture: Effects of cohesive laws, mixes, and print parameters in 3D eXtended FEM","authors":"Faisal Mukhtar","doi":"10.1016/j.compstruc.2025.107822","DOIUrl":"10.1016/j.compstruc.2025.107822","url":null,"abstract":"<div><div>Unlike conventional concrete fractures, few models of 3D-printed concrete (3DPC) fractures have been reported; moreover, systematic validation across diverse tests, materials, and laboratories is lacking. This paper first reviews existing 3DPC fracture simulations against experiments, noting mixed performance in most cases. Additionally, current models often require excessive material parameters that can be difficult to measure and interpret, along with a scarcity of 3D modeling. To address these issues, the paper develops a robust 3D validation framework using the generalized/eXtended finite element method to simulate both interlayer bonds and intralayer fractures in 3DPC/cementitious materials. Four softening models were assessed by capturing linear and nonlinear fracture responses under tensile, bending, and shear tests. Different 3DPC mixtures (plain, fiber-reinforced, and limestone-calcined clay) from existing experimental studies across different laboratories were used for validation, showing good agreement with experimental load–displacement behavior. The influences of layer print interval and nozzle standoff distance from two separate tests were investigated, revealing that the bilinear cohesive model provided the most consistent predictions for plain and fiber-reinforced 3DPC under tension and bending. In contrast, the Park–Paulino–Roesler and Xu–Needleman cohesive models better captured fracture behavior for the limestone-calcined clay mix, while the linear cohesive model was most suitable for shear mode. A fracture in a topologically optimized 3DPC girder was also simulated, illustrating the method’s applicability to large-scale structural elements, the importance of the material mix, and highlighting a scenario where 2D approximations are inapplicable.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"315 ","pages":"Article 107822"},"PeriodicalIF":4.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083776","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}

引用次数: 0

Three-dimensional train-periodic slab track-subgrade dynamics model based on the iterative solution and Green’s function method 基于迭代解和格林函数法的三维列车-周期板轨道-路基动力学模型

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-19 DOI: 10.1016/j.compstruc.2025.107784

Yu Sun , Sen Zhang , Mengting Xing , Zhiyong Shi , Pengfei Liu

{"title":"Three-dimensional train-periodic slab track-subgrade dynamics model based on the iterative solution and Green’s function method","authors":"Yu Sun , Sen Zhang , Mengting Xing , Zhiyong Shi , Pengfei Liu","doi":"10.1016/j.compstruc.2025.107784","DOIUrl":"10.1016/j.compstruc.2025.107784","url":null,"abstract":"<div><div>This paper develops an iterative solution model for the efficient and accurate simulation of the dynamics of a three-dimensional (3D) train-periodic slab track-subgrade (TPSTS) system. The entire system is divided into the train-rail subsystem and the periodic slab-subgrade subsystem. An ordinary differential equation (ODE) model of the train-rail system is established, and a step-moving strategy is employed to enhance the computational efficiency. A frequency-domain Green’s function method (GFM) model is employed for modelling the periodic slab-subgrade. Considering the periodicity, symmetry, and attenuation characteristics of the track structure, the Green’s function of the slab-subgrade structure is obtained by conducting harmonic response analysis on a finite element model (FEM) of a quarter slab-subgrade structure. The proposed model is utilized to investigate the vibration characteristics of the high-speed train-track-subgrade system. The results indicate that the model exhibits good convergence, accuracy, and efficiency. The periodicity of the track structure has a significant impact on the statistical values of subgrade displacement and stress amplitudes along the track’s longitudinal direction. At the subgrade surface, the amplitudes of displacement, stress, and acceleration exhibit fluctuations in the lateral direction of the track. However, with increasing depth, these amplitudes generally attenuate, leading to a more uniform distribution.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"315 ","pages":"Article 107784"},"PeriodicalIF":4.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083775","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}

引用次数: 0

Numerical investigations of the abrasion behavior of concrete based on a coupled Eulerian–Lagrangian approach 基于欧拉-拉格朗日耦合方法的混凝土磨损性能数值研究

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-17 DOI: 10.1016/j.compstruc.2025.107808

Qiong Liu , Lars Vabbersgaard Andersen , Min Wu , Mingzhong Zhang , Didier Snoeck

引用次数: 0

Guided waves in anisotropic and viscoelastic stratified plates: Application to bone quantitative ultrasound 各向异性和粘弹性层状板的导波：在骨定量超声中的应用

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-05-12 DOI: 10.1016/j.compstruc.2025.107820

Ductho Le , Haidang Phan , Hoai Nguyen , Mauricio D. Sacchi , Lawrence H. Le

引用次数: 0