Computers & Structures最新文献_第5页

Cycle-domain plasticity modeling using neural networks and symbolic regression 基于神经网络和符号回归的循环域塑性建模

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2026-01-02 DOI: 10.1016/j.compstruc.2025.108086

Nasrin Talebi, Knut Andreas Meyer, Magnus Ekh

{"title":"Cycle-domain plasticity modeling using neural networks and symbolic regression","authors":"Nasrin Talebi, Knut Andreas Meyer, Magnus Ekh","doi":"10.1016/j.compstruc.2025.108086","DOIUrl":"10.1016/j.compstruc.2025.108086","url":null,"abstract":"<div><div>Simulation of many loading cycles with traditional time-domain material models, requiring discretization of each cycle with several time steps, can result in high computational cost. One effective approach to speed up cyclic simulations is employing cycle-domain material models. Finite element simulations of rails subjected to many wheel passages are a relevant application of such models. Proposing a per-cycle evolution equation for plastic strains in cycle-domain models is, however, a challenge. To address this, we investigate the feasibility and accuracy of using machine learning models as tools for formulating such an equation. Specifically, we enforce our knowledge from constitutive modeling for elasticity and formulate the evolution law by employing feed-forward neural networks with different inputs, as well as symbolic regression to discover an interpretable expression. Training, validation, and test data have been generated using a cyclic time-domain plasticity model considering pulsating uniaxial stress loadings with constant and variable strain ranges. The obtained results demonstrate the potential of cycle-domain plasticity modeling using both uninterpretable and interpretable data-driven machine learning as an alternative to time-domain material modeling. Furthermore, both approaches have revealed reasonably good extrapolation performance beyond the training regime.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108086"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884327","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

Cyclic constitutive model for masonry joint damage and energy dissipation using the distinct element method 用离散元法建立砌体节点损伤与耗能的循环本构模型

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2026-01-02 DOI: 10.1016/j.compstruc.2025.108094

Yopi P. Oktiovan , Francesco Messali , Bora Pulatsu , Satyadhrik Sharma , José V. Lemos , Jan G. Rots

{"title":"Cyclic constitutive model for masonry joint damage and energy dissipation using the distinct element method","authors":"Yopi P. Oktiovan , Francesco Messali , Bora Pulatsu , Satyadhrik Sharma , José V. Lemos , Jan G. Rots","doi":"10.1016/j.compstruc.2025.108094","DOIUrl":"10.1016/j.compstruc.2025.108094","url":null,"abstract":"<div><div>This paper presents a cyclic joint constitutive model within a Distinct Element Method framework to simulate the in-plane response of unreinforced masonry structures. The model combines multi-surface failure criteria, including tensile cut-off, Coulomb friction, and an elliptical compression cap. It incorporates exponential softening, a unified damage scalar for stiffness degradation, and a hardening–softening law for compression. Shear-induced dilatancy is captured via an uplift-correction mechanism with an exponential dilatancy-decay law, while stiffness degradation governs energy dissipation. The model is validated at both material and structural scales. Material-level simulations of cyclic compression and shear tests show close agreement with experimental data. Structural-scale validation on full-height calcium-silicate walls under combined compression and cyclic lateral loading demonstrates the ability to reproduce rocking-dominated, shear-dominated, and hybrid failure mechanisms. The model successfully replicated global hysteretic force–drift loops, capturing stiffness decay and energy dissipation, as well as local failures like cracking, sliding, and toe crushing. The model also reproduced the drift-dependent transition from rocking to friction-controlled sliding, a key mechanism for earthquake assessment. By integrating these features into a single, efficient framework, the proposed constitutive model provides a robust tool for evaluating seismic performance and conserving heritage.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108094"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884457","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

A layerwise plate element formulation with adhesive interface compliance and thermal loads for bonded multilayer structures 一种具有粘接界面柔度和热载荷的层状板单元公式

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2026-01-13 DOI: 10.1016/j.compstruc.2026.108108

D. von Burg, R. Baumann

{"title":"A layerwise plate element formulation with adhesive interface compliance and thermal loads for bonded multilayer structures","authors":"D. von Burg, R. Baumann","doi":"10.1016/j.compstruc.2026.108108","DOIUrl":"10.1016/j.compstruc.2026.108108","url":null,"abstract":"<div><div>This paper presents a novel layerwise plate finite element formulation for the modelling of adhesively bonded multilayer structures subjected to thermal loading. Each structural layer is represented as a Reissner–Mindlin plate, while interlayer coupling is achieved through adhesive shear layers with defined thickness and shear stiffness. This approach enables the direct representation of adhesive compliance, which is often simplified or neglected in layerwise plate formulations. The formulation is derived via the principle of virtual work and incorporates mixed interpolation of tensorial components to prevent shear locking. Numerical examples demonstrate the accuracy and computational efficiency of the proposed element. Comparisons with three-dimensional solid finite element reference models show good agreement with the computed deflections, while requiring substantially fewer degrees of freedom. The resulting computational efficiency makes the approach particularly attractive for iterative analyses such as process simulations and parametric studies involving thermally induced deformations. Since the adhesive shear modulus enters the formulation only as a parameter, time- or temperature-dependent behaviour can be incorporated through constitutive modelling without modification of the element formulation.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108108"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962600","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

Multiscale concurrent topology optimization for large-scale assembled structures 大型装配结构的多尺度并行拓扑优化

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2026-01-08 DOI: 10.1016/j.compstruc.2026.108098

Ran Zheng , Bing Yi , Gil Ho Yoon , Wenlong Liu , Long Liu , Xiang Peng

{"title":"Multiscale concurrent topology optimization for large-scale assembled structures","authors":"Ran Zheng , Bing Yi , Gil Ho Yoon , Wenlong Liu , Long Liu , Xiang Peng","doi":"10.1016/j.compstruc.2026.108098","DOIUrl":"10.1016/j.compstruc.2026.108098","url":null,"abstract":"<div><div>Although additive manufacturing has advantages in the fabrication of complicated structures and has been applied in many fields, large-scale structures often need to be partitioned into smaller components to comply with the size limitations of the printer, which compromises their overall structural performance. This paper presents a two-scale concurrent topology optimization method for multiple assembled structures, which can be fabricated with an additive manufacturing machine under maximum size limitations and further assembled via conventional joining processes. At the macroscale, the topology design of the macroscale structure and the partitioning of the overall structure into multiple components are realized by incorporating component size constraints into the Solid Isotropic Material with Penalization (SIMP) topology optimization framework. At the microscale, the topology of the self-connected microstructure unit located in the macroscale components and the bolted joint positions of the assembled microstructure unit located in the macroscale joints between different components are optimized based on the homogenization method. The smooth connection between the self-connected microstructure and the assembled microstructure is ensured by a geometric constraint. Finally, several numerical examples and a printing example are provided to illustrate the effectiveness of the proposed method, and the effects of some design parameters on the optimization results are analyzed.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108098"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924952","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

Analytical model of variable cross-section flexible wings based on improved mode shape functions 基于改进模态振型函数的变截面柔性机翼解析模型

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2026-01-14 DOI: 10.1016/j.compstruc.2026.108110

Yi-Cheng Sun , Yong Jiang , Chun-Yan Ling , Min Wang , Shun-Qi Zhang

{"title":"Analytical model of variable cross-section flexible wings based on improved mode shape functions","authors":"Yi-Cheng Sun , Yong Jiang , Chun-Yan Ling , Min Wang , Shun-Qi Zhang","doi":"10.1016/j.compstruc.2026.108110","DOIUrl":"10.1016/j.compstruc.2026.108110","url":null,"abstract":"<div><div>As a typical variable-section structure, the flexible wing has attracted considerable attention in the aerospace field due to its advantages in load-bearing capacity, stiffness distribution and mass optimization. However, the variation in geometric and physical properties along the structural length significantly increases the complexity of dynamic modeling, consequently leading to pronounced changes in the mode shapes. To address this challenge, the paper establishes linear dynamic equations of flexible wings based on the Euler–Bernoulli beam theory and Lagrange’s principle. Building on this foundation, a dimensionless variable transformation is applied to normalize the geometric and physical parameters in the governing equations, thereby simplifying the coupling among different variables. Subsequently, a special function expansion method is employed to formalize the mode shapes as a linear combination of Bessel and Meijer-G functions, ensuring the satisfaction of boundary conditions and effectively capturing the influence of cross-sectional variations on modal characteristics. On this basis, an improved mode shape function for variable cross-section cantilever beams is developed. This method enables rapid determination of natural frequencies and mode shape functions without iterative procedures or approximate truncation, significantly improving computational efficiency while maintaining high accuracy, thus making it well-suited for efficient dynamic analysis of complex structures. The results indicate that the natural frequencies and mode shape curves obtained by this method are in good agreement with the ANSYS results, the existing literature, and the experimental tests, thereby verifying the rationality and effectiveness of the proposed method.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108110"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145962152","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

A micromechanics-based computational framework for predicting the elastic modulus and compressive strength of normal and high-performance concrete 一个基于微力学的计算框架，用于预测普通和高性能混凝土的弹性模量和抗压强度

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2025-12-03 DOI: 10.1016/j.compstruc.2025.108055

Hoang-Quan Nguyen , Gia-Khuyen Le , Tinh Quoc Bui , Thi-Loan Bui , Bao-Viet Tran

{"title":"A micromechanics-based computational framework for predicting the elastic modulus and compressive strength of normal and high-performance concrete","authors":"Hoang-Quan Nguyen , Gia-Khuyen Le , Tinh Quoc Bui , Thi-Loan Bui , Bao-Viet Tran","doi":"10.1016/j.compstruc.2025.108055","DOIUrl":"10.1016/j.compstruc.2025.108055","url":null,"abstract":"<div><div>This study presents a computational framework that integrates micromechanics, a phase-field damage model, and genetic programming-based symbolic regression to predict the elastic modulus and compressive strength of both normal and high-strength concrete. The micromechanical formulations are developed using an extended generalized self-consistent scheme, incorporating a quasi-elasto-plastic brittle behavior governed by a von Mises yield criterion. A simplified phase-field damage model is proposed, introducing a compressive phase-field variable along with an analytical approximation that links fracture energy to the macroscopic behavior of concrete. The proposed framework is validated through strong agreement among numerical simulations, experimental observations, and theoretical predictions, supporting the development of a robust theoretical database for elastic modulus, compressive strength, and associated material properties. Based on this dataset, an efficient computational strategy is developed and examined to generate simple and practical symbolic regression expressions within the Genetic Programming-based framework to derive predictive equations for elastic modulus as a function of compressive strength and aggregate characteristics. These equations are validated against established standards and experimental data, confirming their accuracy and practical relevance for structural design applications.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108055"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145657739","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

Designer preference-driven topology optimization using a human-in-the-loop neural network 设计者偏好驱动的拓扑优化使用人在环神经网络

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2025-12-04 DOI: 10.1016/j.compstruc.2025.108070

Boxu Tian , Wenliang Qian , Yefei Yang

{"title":"Designer preference-driven topology optimization using a human-in-the-loop neural network","authors":"Boxu Tian , Wenliang Qian , Yefei Yang","doi":"10.1016/j.compstruc.2025.108070","DOIUrl":"10.1016/j.compstruc.2025.108070","url":null,"abstract":"<div><div>Topology optimization is a powerful computational methodology for generating high-performance structures. However, ignoring aesthetics limits the practical application. User interaction helps address this limitation, but current methods lack generality, needing separate design and sensitivity analyses for each interaction form. To overcome this challenge, we propose a Designer Preference-Driven Neural Topology Optimization (DPDNTO) method, which utilizes a unified interaction parameter to formulate a unified, mask-based loss function to control geometric features and material distribution. In addition, feature sizes are flexibly controlled by adjusting the number of neurons in the DPDNTO method. By utilizing the backpropagation mechanism of neural networks, the proposed method efficiently updates design variables and automatically balances these multi-objective tasks through a dynamic parameter strategy. To provide further intuitive visual feedback, a multimodal large model is employed to render optimized structures into conceptual visualization images. Numerical experiments demonstrate that the proposed method not only enhances the aesthetic quality of the final designs but also improves structural stress performance and linear buckling resistance. These findings establish DPDNTO as a versatile and computationally efficient paradigm, bridging the critical gap between algorithmic optimization and preference-driven aesthetics and paving the way for advancements in fields such as architecture, industrial design, and advanced manufacturing.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108070"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145685359","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

Phase-field model of hydraulic fracturing based on the unified strength theory 基于统一强度理论的水力压裂相场模型

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2026-01-14 DOI: 10.1016/j.compstruc.2026.108106

Dingyu Li , Wei He , Xiang Ao , Peidong Li

{"title":"Phase-field model of hydraulic fracturing based on the unified strength theory","authors":"Dingyu Li , Wei He , Xiang Ao , Peidong Li","doi":"10.1016/j.compstruc.2026.108106","DOIUrl":"10.1016/j.compstruc.2026.108106","url":null,"abstract":"<div><div>In this study, a phase-field model for hydraulic fracturing is developed, wherein the unified strength theory formulated by Maohong Yu is incorporated into the phase-field model framework to establish a novel phase-field driving energy, thereby enhancing the accuracy of mixed-mode fracture prediction. Comprehensive governing equations describing the mechanical, damage, and fluid transport fields are mathematically derived, alongside detailed finite element discretization schemes for the coupled multi-field variables. To validate the proposed model, multiple two-dimensional and three-dimensional numerical examples are conducted, demonstrating its robustness, precision, and the ability to simulate intricate hydraulic fracturing processes in rocks subjected to various loading conditions. Comparative analyses reveal an excellent agreement between the numerical results and the Khristianovic-Geertsma-de Klerk analytical model, as well as experimental data from true triaxial hydraulic fracturing tests. The results demonstrate that the proposed model effectively captures the processes of crack nucleation, propagation, and deflection. Consequently, this model stands as a robust computational tool for analyzing complex fracture mechanisms in hydraulic fracturing engineering.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108106"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976683","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

A generalized direct inverse mass matrix for the method of finite spheres in transient explicit wave propagation analysis 瞬态显式波传播分析中有限球法的广义直接反质量矩阵

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2026-01-16 DOI: 10.1016/j.compstruc.2026.108099

Insu Jeong, Minchul Yu, Gunwoo Noh

引用次数: 0

An experimental assessment of ground-borne vibration impact of tramcars 有轨电车地面振动冲击试验研究

IF 4.8 2区工程技术

Computers & Structures Pub Date : 2026-01-15 Epub Date: 2025-12-12 DOI: 10.1016/j.compstruc.2025.108069

L. Faccini, F. Castellini, E. Di Gialleonardo, S. Alfi, S. Bionda, R. Corradi

{"title":"An experimental assessment of ground-borne vibration impact of tramcars","authors":"L. Faccini, F. Castellini, E. Di Gialleonardo, S. Alfi, S. Bionda, R. Corradi","doi":"10.1016/j.compstruc.2025.108069","DOIUrl":"10.1016/j.compstruc.2025.108069","url":null,"abstract":"<div><div>Ground-borne vibrations from rail transit systems present challenges in urban areas due to their effects on structures and human comfort. This study introduces a falling mass impact setup to estimate the transmissibility between the track and a receiver in the surrounding area. This enables the calculation of the Line Source Transfer Mobility (LSTM), required by the U.S. Federal Transit Administration (FTA) to assess ground-borne vibrations from rail vehicles. The falling mass method offers higher energy input and better repeatability than traditional impact hammers, making it suitable for evaluating soil and building transmissibility even at long distances. Transfer mobilities obtained with this method are validated against hammer-based measurements. Vibration levels produced by a modern tramcar running at 10, 30, and 50 km/h are measured at various distances and normalised using the corresponding LSTM, in line with the FTA Detailed Assessment Method. Force Density Levels (FDLs) are calculated for each speed, with the highest values at 50 km/h. A strong consistency of FDLs across distances confirms the method’s robustness. This integrated experimental approach offers a reliable framework for characterising vibration sources and supports the assessment of vehicles and infrastructure planning in areas sensitive to vibration.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108069"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732464","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