Computers & Structures最新文献

{"title":"Efficient reliability-based design optimization of dynamic linear systems subjected to filtered white-noise inputs","authors":"Nir Itzhak Ben-Israel ,&nbsp;Michalis Fragiadakis ,&nbsp;Oren Lavan","doi":"10.1016/j.compstruc.2025.108047","DOIUrl":"10.1016/j.compstruc.2025.108047","url":null,"abstract":"<div><div>This paper presents a reliability-based design optimization methodology for dynamic linear structural systems, subjected to filtered white-noise excitations. A novel double-loop approach is proposed, where both inner and outer optimization problems are efficiently solved using gradient-based algorithms, combining a specifically-tailored adjoint method for the sensitivity analyses, while the reliability analyses are carried out using the first-order-reliability-method (FORM). Key to the proposed approach is that the mean-square of the responses of interest is efficiently evaluated via the Lyapunov equations, which leads to faster and more efficient reliability-based designs. The application of the methodology is demonstrated in three examples in which control systems are optimized. First, a serviceability limit-state function is considered for a footbridge subjected to crowd load excitation. The footbridge vibrations are controlled by viscous dampers and tuned-mass dampers. Second, a limit-state function is considered for a bending moment frame, undergoing a seismic event. The interstorey drifts of the frame are controlled one time by viscous dampers and another time by tuned-mass-dampers. Third, a large benchmark frame is optimized. Verification of the probability of failure achieved via the first-order-reliability-method is performed using Monte Carlo simulations (MCS), showing good agreement between the two methods. A clear resemblance is shown between optimal design achieved via zero-order method, although with significantly reduced computational cost.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108047"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823167","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":"Analysis of friction-adhesion-buckling interactions in shell-like elastic structures via an isogeometric point-to-segment contact formulation","authors":"Chunfa Wang ,&nbsp;Libang Hu ,&nbsp;Yudong Li ,&nbsp;Hengxiao Lu ,&nbsp;Yan Li ,&nbsp;Han Hu ,&nbsp;Zhiqiang Feng","doi":"10.1016/j.compstruc.2025.108092","DOIUrl":"10.1016/j.compstruc.2025.108092","url":null,"abstract":"<div><div>Shell-like elastic structures—such as hemispherical shells and semi-cylinders—exhibit heightened susceptibility to buckling instability under axial compressive loading, a phenomenon particularly critical in confined assemblies, stacked components, or adhesive-bonded structures. In such practical engineering scenarios, frictional contact and adhesion interactions with adjacent objects emerge as pivotal factors influencing buckling behavior. These interfacial forces, stemming from localized contact pressures, confinement effects, or adhesive bonding, induce a complex coupling between contact mechanics and buckling phenomena, thereby fundamentally altering the structural response under compressive stress. To analyze these effects, we present a computational framework that integrates a point-to-segment (PTS) contact formulation and an exponential cohesive zone model for adhesion. This unified framework enables the simultaneous simulation of friction, adhesion, and buckling, including large deformations and sliding. Implemented on an in-house isogeometric analysis platform, the framework is rigorously validated against theoretical, experimental, and numerical benchmarks. Numerical experiments demonstrate its robustness under challenging conditions, revealing key bidirectional couplings: (1) friction and adhesion suppress buckling by resisting compressive stresses within the shell-like structures, thereby increasing the critical buckling load; (2) buckling-induced geometric nonlinearities dynamically alter contact areas and pressure distributions, which in turn modulate interfacial friction and adhesion strengths.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108092"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884326","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 priori mesh error calculation method considering different constitutive models in impact and explosion simulations","authors":"Boyang Zhu ,&nbsp;Xin Bao ,&nbsp;Gang Li ,&nbsp;Qiushi Yan ,&nbsp;Jingbo Liu ,&nbsp;Shiwei Wang","doi":"10.1016/j.compstruc.2025.108081","DOIUrl":"10.1016/j.compstruc.2025.108081","url":null,"abstract":"<div><div>The determination of optimal mesh size constitutes a critical factor in the numerical simulation of wave propagation, particularly under high-frequency excitations such as blast or impact loadings. In such contexts, mesh dimension significantly influences both the accuracy and efficiency of computations. Existing meshing strategies predominantly rely on numerical mesh independence analysis, which necessitates extensive computations to identify the requisite mesh size, resulting in diminished computational efficiency and limited generality. This study presents a novel theoretical approach for quantifying meshing-induced errors considering different constitutive models, founded upon wave field propagation theory and frequency-domain analysis. This approach enables the a priori estimation of appropriate mesh size along with its associated frequency truncation error through theoretical formulas, thereby obviating the need for exhaustive mesh sensitive studies and reducing computational expenditure. Furthermore, this study examines the impacts of input waveforms characteristics, geometric attenuation and material nonlinearity upon mesh-induced errors, providing theoretical explanations for empirical findings from previous studies. Numerical simulations of traditional engineering materials demonstrate the accuracy and engineering applicability of the proposed error estimation method. And by combining the proposed error estimation method with mesh refinement techniques, an adaptive meshing strategy that adheres to the error threshold is proposed. This research provides a more universal, efficient, and precise foundation for mesh generation in explosion simulations, potentially driving the advancement of highly refined and computationally efficient numerical modeling techniques.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108081"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823162","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":"Automated design optimization of bowstring tied-arch concrete bridges","authors":"Alberto M.B. Martins ,&nbsp;Luís M.C. Simões ,&nbsp;João H.J.O. Negrão","doi":"10.1016/j.compstruc.2025.108068","DOIUrl":"10.1016/j.compstruc.2025.108068","url":null,"abstract":"<div><div>This article presents an optimization-based approach to assist in the design of bowstring tied-arch concrete bridges. This approach comprises an automated procedure to define initial designs and a gradient-based algorithm, from which local optimum solutions are obtained, and the least-cost solution is selected as the optimum design. The finite element method is used for the three-dimensional analysis considering several load cases, geometrical nonlinearities and time-dependent effects. The design is posed as a cost minimization subject to constraints on the displacements and stresses defined according to the Eurocodes provisions. A constraint aggregation approach is adopted to solve the problem by minimizing a convex scalar function. The discrete direct method for sensitivity analysis provides the algorithm with the structural response to changes in the design variables. The design variables are the arch and deck cross-sectional sizes, the hangers and tendons cross-sectional areas and prestressing forces, the geometry of the arch, the hangers’ layout and the number of hangers’ anchoring points in the deck. The optimization of a 120 m single-span bridge illustrates the features and applicability of the proposed approach. Optimum solution with Nielsen layout, deck slenderness of 1/150 and arch rise-to-span ratio of 1/5.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108068"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145685360","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":"High-order time-spectral BEM for efficient elastodynamic analysis","authors":"Yan Gu ,&nbsp;Wenzhen Qu ,&nbsp;Chuanzeng Zhang ,&nbsp;Vladimir Babeshko ,&nbsp;Yuri V. Petrov","doi":"10.1016/j.compstruc.2025.108076","DOIUrl":"10.1016/j.compstruc.2025.108076","url":null,"abstract":"<div><div>This study presents a novel boundary element method (BEM) framework for the accurate and efficient numerical solution of elastodynamic problems. By reformulating the time-derivative terms as equivalent body forces, the method enables the use of static fundamental solutions for dynamic analysis, thereby eliminating the need for frequency-domain transformations or the construction of complex time-dependent Green’s functions. In the temporal domain, instead of directly approximating the time-differentiation operators, a more stable time-spectral integration technique based on orthogonal polynomial expansions is introduced. This scheme can, in principle, achieve arbitrary-order of accuracy in the temporal space and eliminate the strict time-step limitations inherent in conventional finite-difference-based schemes. Moreover, the resulting coefficient matrix is time-independent and therefore needs to be computed only once for the entire time-marching process. To evaluate domain integrals, discontinuous triangular elements are employed for spatial discretization, and a scaled coordinate transformation (SCT) technique is employed to address singularities arising from source-field point coincidences. Preliminary numerical experiments in elastodynamic analysis demonstrate that the proposed framework is robust and flexible for long-time dynamic simulations, particularly in problems involving rapid transients or complex geometries.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108076"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731206","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":"Experimental and numerical analysis of angle-ply laminated plates based on a refined higher-order theory","authors":"Jie Mei ,&nbsp;Shengbo Ling ,&nbsp;Yunhao Huang","doi":"10.1016/j.compstruc.2025.108078","DOIUrl":"10.1016/j.compstruc.2025.108078","url":null,"abstract":"<div><div>Accurately predicting the deformation of composite laminates is challenging due to the zig-zag effect in in-plane displacements, which arises from significant stiffness differences between layers. To address these limitations, this study proposes a novel Angle-ply Higher-order Deformation Theory coupled with a computationally efficient refined finite element, to investigate the bending response of angle-ply hybrid composite laminates. The AHDT is established via a global–local concept, utilizing Legendre polynomials to capture the zig-zag effect and interlaminar stress continuity phenomenon. The corresponding triangular element implements this model using C⁰ and C¹ continuities, ensuring high accuracy and computational efficiency. The accuracy and computational efficiency of the model are rigorously assessed through comparisons with three-dimensional elastic solutions and a three-dimensional finite element model. Furthermore, validation is provided via three-point bending tests on carbon/glass fiber hybrid composites, with full-field deformation measured using Digital Image Correlation. Both theoretical and experimental results confirm that the stacking sequence is the predominant factor affecting flexural stiffness, outweighing both material type and ply orientation. A change in the stacking sequence alone can reduce deflection by up to 70.77%. Consequently, this study conclusively shows that a rational design of the stacking sequence, material combination, and ply orientation is critical for optimizing the flexural performance of composite laminates.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108078"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823166","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":"Enhanced load-shape integrated measurement of plate structures based on matched section analysis","authors":"Yanhao Guo ,&nbsp;Yuhui Hu ,&nbsp;Yan Zeng ,&nbsp;Feifei Zhao ,&nbsp;Hong Bao","doi":"10.1016/j.compstruc.2025.108083","DOIUrl":"10.1016/j.compstruc.2025.108083","url":null,"abstract":"<div><div>Load and deformation measurement of plate structures are fundamental for structural design and health monitoring. However, existing methods are limited to independently reconstructing either deformation or load, without being capable of integrating sensing both the deformation and load in a unified sensing formulation. To address this gap, a matched-section discretization method is proposed, transforming the plate into two orthogonal sets of equivalent beam elements. The structural displacement field is formulated in terms of cross-sectional deformation parameters, internal force/moment parameters, and uniformly distributed loads. Mapping equations between discrete strain measurements and these parameters are then established. By inputting real-time discrete strain data, the least-squares inverse method is employed to simultaneously reconstruct the deformation and load distributions. The proposed method is validated through simulations and experiments on plate structures with varying thicknesses, boundary conditions, and load cases. In the simulation results, the maximum deformation sensing error is limited to 3.1%, and the load sensing error remains below 8.1% with one sensing element. These findings demonstrate the high accuracy and practical potential of the proposed approach in structural health monitoring and intelligent structural design.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108083"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823164","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":"Development of isogeometric-finite element unified numerical methodology for nonlinear planar instability analysis of dual-phase SiO2-graphene nanoplatetlets reinforced shallow curved microbeams","authors":"Saeid Sahmani ,&nbsp;Reza Ansari ,&nbsp;Mohammad Kazem Hassanzadeh-Aghdam ,&nbsp;Mona Zareichian","doi":"10.1016/j.compstruc.2025.108082","DOIUrl":"10.1016/j.compstruc.2025.108082","url":null,"abstract":"<div><div>The main intention of the proposed multiscale framework is to employ an isogeometric analysis formulation for the size-dependent nonlinear planar instability analysis of dual-phase nanocomposite shallow curved beams at the microscale. A finite element–based micromechanics model is developed at the representative volume element level to capture the material properties. The homogenized properties obtained from the representative volume element-level finite element analysis are directly incorporated into the isogeometric model. This coupling enables accurate surveying of the small scale-dependent nonlinear in-plane stability characteristics of uniformly laterally loaded dual-phase inhomogeneous shallow curved microbeams reinforced with SiO₂ nanoparticles and graphene nanoplatelets, while embracing distinct strain gradient tensors. In this regard, cuboid-shaped representative volume elements are employed. This enables consideration of the interphase between the dual-phase nanofillers and the polymer, as well as the critical role of nanofiller agglomeration, in order to create an accurate multiscale correlation. Additionally, non-uniform rational B-splines are utilized in the relevant discretization process. This process involves distinct microstructural-dependent strain gradient tensors. The numerical results reveal that increasing the SiO₂ nanoparticle volume fraction significantly enhances both the upper and lower limit loads by nearly 69.5%. This increase does not markedly affect the axial resultant load or the lateral deflection. Conversely, increasing the SiO₂ nanoparticle diameter at a fixed volume fraction notably decreases the load-bearing capacity by about 49.5%. Similarly, a rise in graphene nanoplatelet thickness leads to an approximately 61.1% reduction in the stability limits. The inclusion of the interphase region between the nanofillers and the matrix improves the upper and lower limit loads by around 17.4%, demonstrating its reinforcing influence. Furthermore, aligning nanofillers along the beam’s longitudinal direction increases the limit loads by roughly 48.1% compared to the random dispersion case. In contrast, agglomeration has the opposite effect, reducing the load-carrying capacity by about 12.4%.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108082"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823163","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 finite strain elastic-corrector rate formulation for void growth models","authors":"Meijuan Zhang ,&nbsp;Guadalupe Vadillo ,&nbsp;Francisco J. Montáns","doi":"10.1016/j.compstruc.2025.108072","DOIUrl":"10.1016/j.compstruc.2025.108072","url":null,"abstract":"<div><div>Recently, a novel framework for large strain elastoplasticity has been introduced. This approach preserves the multiplicative decomposition of the deformation gradient, avoiding Green-like elastoplastic decompositions of total strains, but resulting in additive predictor-corrector algorithmic implementations as in small strains, and using any form of hyperelastic stored energy. Using this approach, large strain complexities reduce to non-iterative kinematical pre- and post-processors. In this work, we extend the elastic-corrector rates formulation for dealing with non-isochoric void-growth plasticity. In contrast to other large strain formulations, in the present work the relation of the void growth with the plastic flow of the matrix is not assumed, but obtained from the multiplicative decomposition, preserving exactly the kinematics of the volumetric parts. We use the Gurson-Tvergaard-Needleman (GTN) function to demonstrate the use of the framework as well as the implementation of a fully implicit Newton algorithm. The novel GTN formulation is hyperelastic, does not need the exponential mapping, and keeps an additive algorithmic update as in the infinitesimal formulation. Other non-isochoric functions can also be employed with the same kinematics.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108072"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823155","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":"An energy-limited gradient damage approach for 3D thermal fracture analysis","authors":"Cancan Su ,&nbsp;Dechun Lu ,&nbsp;Xiaoying Zhuang ,&nbsp;Timon Rabczuk ,&nbsp;Xin Zhou ,&nbsp;Qin He ,&nbsp;Xiuli Du","doi":"10.1016/j.compstruc.2025.108084","DOIUrl":"10.1016/j.compstruc.2025.108084","url":null,"abstract":"<div><div>This study presents a thermo-mechanically coupled nonlocal damage model for brittle fracture that is practically implementable and extensible to multi-physics applications. The proposed damage formulation preserves thermodynamic consistency within a variational framework and employs an implicit gradient scheme for efficient regularization. A local damage variable is defined to represent different fracture modes, while a Helmholtz-type PDE is introduced to mitigate mesh dependence. The model is first verified through mechanical benchmark problems, which confirm reduced mesh sensitivity. Its predictive capability is then demonstrated in thermo-mechanical simulations involving diverse geometries, initial conditions, material properties, and spatial dimensions (2D and 3D). The results consistently indicate that the proposed approach delivers robust and accurate predictions of thermal fracture processes while maintaining high computational efficiency.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"321 ","pages":"Article 108084"},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884460","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}