International Journal of Solids and Structures最新文献

{"title":"Development of a stress-state-dependent failure model of S355 steel for thin-walled tubes subjected to cantilever bending","authors":"Piotr Kędzierski,&nbsp;Andrzej Morka","doi":"10.1016/j.ijsolstr.2025.113599","DOIUrl":"10.1016/j.ijsolstr.2025.113599","url":null,"abstract":"<div><div>The paper presents the development of a failure model dedicated to the simulation of cantilever bending of thin-walled tubes. The primary task was preceded by the development of a S355 structural steel material model with piecewise linear hardening curve and its validation based on the results of a radial crush test. The cantilever bending of smooth tubes and tubes with a plastic hinge initiator was subsequently conducted, and the results obtained were used to evaluate the failure models considered. At the same time, the effect of the number of failed integration points prior to element erosion on the response of failure model was investigated. The proposed approach, in which fracture occurs after reaching a triaxiality-dependent failure criterion in approximately half of the integration points through the element’s thickness, proved to be qualitatively and quantitatively superior to other models, as it accurately reflected the experimental results for both smooth and indented tubes. The paper concludes with the application of the developed failure model to simulate the performance of a post-type crash cushion. The predicted fracture location and pattern demonstrate high consistency with observations from an equivalent crash test, indicating that the proposed approach can be effectively applied to modeling bending-dominated problems in thin-walled structures made of ductile materials.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"322 ","pages":"Article 113599"},"PeriodicalIF":3.8,"publicationDate":"2025-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grain size effects on slip band development","authors":"Rembert D. White ,&nbsp;Behnam Ahmadikia ,&nbsp;Irene J. Beyerlein","doi":"10.1016/j.ijsolstr.2025.113589","DOIUrl":"10.1016/j.ijsolstr.2025.113589","url":null,"abstract":"<div><div>Crystallographic slip localizations, called slip bands, concentrate stress in polycrystals, often leading to the nucleation of damage. Slip band development has been experimentally shown to be sensitive to grain size, tending to develop more frequently and with a greater intensity in large grains. In this work, we investigate the influence of grain size on the propensity for crystallographic slip band development. To this end, we employ the slip band-fast Fourier transform method (SB-FFT). SB-FFT is a 3D, full-field crystal plasticity model that permits the incremental development of discrete crystallographic slip bands according to microstructure and material properties. We present a model Inconel 718 tricrystal to isolate the effect of grain size. Our findings show that slip bands in large grains develop at lower applied strain levels and at a faster rate than slip bands in small grains. The grain size effect is due to a backstress produced primarily by the interaction of the slip band and its neighboring grain. The backstress is most intense at small grain sizes, impeding slip activity within a developing slip band and immediately surrounding the slip band.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"322 ","pages":"Article 113589"},"PeriodicalIF":3.8,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing pre-stretching for modulating fracture competition in multistep ultrathin chip peeling","authors":"Kewen Shi ,&nbsp;Weijian Jiao ,&nbsp;Ziwen Kong ,&nbsp;Yonglin Chen ,&nbsp;Siyu Chen","doi":"10.1016/j.ijsolstr.2025.113597","DOIUrl":"10.1016/j.ijsolstr.2025.113597","url":null,"abstract":"<div><div>In the backend process of chip manufacturing, due to the highly dense arrangement of chips after wafer dicing, stretching pretreatment for spacing expansion is essential prior to chip-peeling stage. This study quantitatively integrated substrate pre-stretching step with chip-peeling techniques (needle ejection and vacuum suction), performing a mechanical analysis to develop parameterised optimisation for a multistep process. A non-equal-length laminated Timoshenko beam was modelled for the chip–adhesive–substrate (CAS) structure, particularly considering the transmission relationship of pre-stretching and its impact on structural deformation thorough the multistep process. Closed-form solutions for the delamination modelling were derived analytically and validated through finite element analysis. A dimensionless index was proposed to compare chip-peeling safety under different procedure combinations, and comprehensively evaluate the fracture competition. Appropriate pre-stretching was found to mitigate chip failure by neutralising stress fields and alter adhesive fracture by modulating the energy aggregation modes during delamination, and the optimal value of pre-stretching was established. The crack propagation sensitivity to load response hysteresis was assessed, illustrating that the optimised process required careful management of technical efficiency to ensure production safety. The multistep chip-peeling optimisation was validated experimentally, providing effective suggestions for manufacturing technology.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"322 ","pages":"Article 113597"},"PeriodicalIF":3.8,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144826856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 inversion methodology for the finite deformation of the curved beams based on the customized local strain sensing strategy","authors":"Hao Wang ,&nbsp;Kai Zhang ,&nbsp;Jinyu Ji ,&nbsp;Xiaogang Guo","doi":"10.1016/j.ijsolstr.2025.113591","DOIUrl":"10.1016/j.ijsolstr.2025.113591","url":null,"abstract":"<div><div>Due to the large geometric deformation capacity of curved beams, they are frequently employed as critical components in superstructure design and stretchable electronic technology. However, there is still a lack of an efficient method for monitoring and inverting the global deformation behavior of such structures under unknown loading conditions. In this study, the LIG-based customized strain sensors are used to capture the local strains of the curved beam structure. A finite deformation theory-based inversion framework is developed to reconstruct the large geometric deformation by correlating discrete strain measurements with the finite deformation analysis of the curved beams. This approach enables rapid inversion for the finite deformation of the curved beams under uniaxial tensile loads, and its validity has been confirmed by comparing with the experimental deformation results. The demonstration of global deformation inversion of lattice structures shows that this method provides direct and effective guidance for the design and optimization of mechanical metamaterial and stretchable electronic devices.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"322 ","pages":"Article 113591"},"PeriodicalIF":3.8,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of loading mode on the prediction accuracy of nonlinear viscoelastic models for soft adhesives","authors":"Abuzar Es’haghi Oskui ,&nbsp;Jinrui Cao ,&nbsp;Sorour Sadeghzade ,&nbsp;Hongyan Yuan","doi":"10.1016/j.ijsolstr.2025.113595","DOIUrl":"10.1016/j.ijsolstr.2025.113595","url":null,"abstract":"<div><div>The precise modeling of nonlinear viscoelastic behavior in soft adhesives plays an essential role in their application in advanced technologies. Linear viscoelastic models, such as hyperelasticity with the Prony series, have exhibited limitations in accurate prediction of material behavior under large strains. This study calibrates a nonlinear viscoelastic three-network viscoplastic (TNV) model based on experimental data to effectively capture the complex mechanical behavior of soft adhesives under large strains. A series of dynamic oscillatory shear tests, monotonic (i.e., continuous uniaxial shear tests) and creep tests, and cyclic loading tests were employed to explore the full range of material responses. Based on the results, the TNV model outperformed linear ones in prediction of stress, energy dissipation, and material softening. Furthermore, a low-cycle loading–unloading test was identified as an effective and cost-efficient approach for calibration of the constitutive models. The validation of the extracted model demonstrated its high accuracy in predicting the behavior of soft materials under various loading scenarios, particularly cyclic loading conditions, thereby offering valuable insights into the mechanical performance of soft adhesives, especially in flexible display technologies. This research establishes the groundwork for more efficient material characterization with minimum testing, providing a reliable framework for predicting the long-term performance of visco-hyperelastic materials in large strain applications.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"322 ","pages":"Article 113595"},"PeriodicalIF":3.8,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stability of an elastic honeycomb under out-of-plane compression","authors":"Yingjiang Tang ,&nbsp;Enze Chen ,&nbsp;Stavros Gaitanaros","doi":"10.1016/j.ijsolstr.2025.113588","DOIUrl":"10.1016/j.ijsolstr.2025.113588","url":null,"abstract":"<div><div>The present study focuses on the nonlinear axial response of an elastic honeycomb and the associated instabilities that govern it. Simulations on numerical models with finite size domains reveal that the compressive behavior of elastic honeycombs is a product of a cascade of bifurcations with distinct characteristics. Stability analysis on periodic unit cells and finite domain structures shows that the first bifurcation corresponds to local plate buckling with a single wave formed across the honeycomb height. This is followed by a series of mode-jumping bifurcations that alter the wavelength of the buckled cell walls across the domain with, however, minimal effect on the macroscopic response. At increased compression, localization initiates in the form of folding at a boundary wall, leading to a continuously decreasing tangent stiffness which terminates at a global limit load. At this point, all exterior plates have localized, and the distortional buckling mode propagates in the interior cells. We further examine and quantify the effect of higher volume fractions, different domain size and shapes, and material nonlinearity on each critical stress and associated deformation mode.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"321 ","pages":"Article 113588"},"PeriodicalIF":3.8,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Swelling and large deformation of polymer brushes","authors":"Jiawei Yang","doi":"10.1016/j.ijsolstr.2025.113587","DOIUrl":"10.1016/j.ijsolstr.2025.113587","url":null,"abstract":"<div><div>A polymer brush consists of polymer chains with one end anchored on a solid substrate and the other end being free. This paper formulates a thermodynamic model to quantitatively characterize the swelling and deformation of polymer brushes. The model integrates the freely jointed chain model to describe the elasticity of polymers and the Flory-Huggins model to describe the swelling of polymers. The swelling and deformation are unidirectional, confined in a cell defined by the graft area and the height of a polymer. Depending on the three conformations: a dilute brush, a contact brush, and a high-density brush, the swelling and deformation behaviors are strongly influenced. The model links the physical parameters of polymers and solvents, e.g., graft area, polymer length, and solvent quality, to the polymer brush conformations, swelling, and deformation. The predicted brush heights at dry and swollen states agree with both the established scaling laws and the experimental data collected from the literature. The model is further applied to characterize the force-stroke relationship in polymer brush actuation when the swelling is constrained. The blocking force, maximum free stroke, and the conditions under which they are obtained are determined. This model may be useful to guide the polymer brush design to achieve desired functions in a broad range of practical applications.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"321 ","pages":"Article 113587"},"PeriodicalIF":3.8,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vibration-induced friction modulation for an oscillator moving on an elastic rod","authors":"E. Sulollari,&nbsp;K.N. van Dalen,&nbsp;A. Cabboi","doi":"10.1016/j.ijsolstr.2025.113572","DOIUrl":"10.1016/j.ijsolstr.2025.113572","url":null,"abstract":"<div><div>Several studies have been dedicated to altering friction forces, with external excitation being one of the approaches explored. When the latter is considered, its influence has primarily been studied within the context of discrete systems. Therefore, in this study, a moving oscillator in frictional contact with an elastic rod of finite length subjected to distributed damping is considered, to study the influence of external excitation in the presence of support flexibility on friction modulation. The modal expansion method is used to derive the modal equations of motion, which are then solved numerically. Two cases are investigated, one with the load acting on the mass and the other with the load acting on the rod. It is found that, for both cases, friction modulation varies along the rod’s length, and it differs from that obtained assuming a rigid rod. Moreover, for the load-on-mass scenario, a critical velocity is defined, providing direct insight into the friction modulation differences between flexible and rigid rod cases. For the load-on-rod scenario, large deformations are observed close to and above resonance, and geometric nonlinearity is accounted for to describe the system dynamics accurately. To link theoretical results to applications, the findings are used to qualitatively interpret slip-joint vibration-assisted decommissioning tests, and are compared with experimental results in which friction force reduction is explained through the use of elasto-plastic friction models that account for surface deformability, showing good qualitative agreements between the theoretical and experimental outcomes.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"321 ","pages":"Article 113572"},"PeriodicalIF":3.8,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Local shear stiffness switches between bending- and stretch-dominated regimes of a random net of elastic filaments","authors":"Róbert K. Németh ,&nbsp;András Á. Sipos ,&nbsp;Layth S. Al-Rukaibawi ,&nbsp;Lili E. Hlavicka-Laczák ,&nbsp;Flórián Kovács ,&nbsp;György Károlyi","doi":"10.1016/j.ijsolstr.2025.113576","DOIUrl":"10.1016/j.ijsolstr.2025.113576","url":null,"abstract":"<div><div>Transitions in a random elastic network are investigated as a function of the stiffness of its constituents. As the local shear modulus, modelled as an energy cost of rotation among cross-linked filaments, is varied, we find a sharp transition between smaller and higher network shear stiffness, similar to that previously found for stretched networks. This transition is similar to the non-affine to affine transition observed in networks without local shear stiffness. We discover that, in the transition regime, the shear component of the total network stiffness shows a peak, and the stretch component increases until reaching a plateau, essentially causing the transition. With a suitable re-scaling of the measured network shear stiffness, we find a good collapse of the data on a single curve. Beyond the transition, in the very large combined bending and shear stiffness regime, we identify a marked stiffening of the network. We also investigate anisotropic networks to find that the transition to a stronger network becomes more emphasized, and the shear component of the total network shear modulus becomes higher during the transition. We suggest that networks, specially anisotropic ones, can be tuned between lower and higher overall shear stiffness by adjusting the local shear modulus using variable cross-linking components.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"321 ","pages":"Article 113576"},"PeriodicalIF":3.8,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relating local field fluctuations in composites with the sensitivity of their effective response to constitutive parameters: An identification framework for elastic and viscoelastic materials","authors":"Robin Valmalette,&nbsp;Cédric Bellis,&nbsp;Christian Hochard,&nbsp;Noël Lahellec","doi":"10.1016/j.ijsolstr.2025.113580","DOIUrl":"10.1016/j.ijsolstr.2025.113580","url":null,"abstract":"<div><div>In the study of composite materials, accurately characterizing the individual properties of constituents is essential but often challenging due to the possible unavailability of raw materials and the complexity of conducting microscale experiments. Inverse homogenization offers a compelling solution by enabling the extraction of microscale properties directly from macroscale experiments, despite being an ill-posed problem. This study focuses on identifying unknown constitutive parameters by minimizing a cost function that measures the discrepancy between actual composite response data and the predicted homogenized behaviour based on candidate parameters. To tackle these optimization problems, both first and second-order gradient-based minimization schemes are employed. This requires evaluating the sensitivity of a composite’s effective response to its constitutive parameters, which is related to local fluctuations in solution fields of elementary cell problems. To so do, first and second-order derivatives of macroscopic stress and effective energy potential are obtained in a general setting, including nonlinear behaviours. Sensitivity maps are computed to gain local information within the representative volume element. The methodology involves repeatedly solving cell problems, efficiently achieved using FFT-based full-field simulations for periodic composites. It is implemented in two test cases involving fiber-reinforced composites to identify hard-to-measure parameters: elastic properties of fibers and viscoelastic properties of the matrix. The latter case uses the Laplace–Carson transform to extend the method to viscoelastic materials. The targeted constitutive properties are successfully identified, and sensitivity analyses assess the effects of uncertainties on the identified parameters. The study provides guidelines for using this sensitivity-based approach in relevant situations.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"321 ","pages":"Article 113580"},"PeriodicalIF":3.8,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}