Journal of The Mechanics and Physics of Solids最新文献

{"title":"Shear banding in high-entropy alloy","authors":"De-Ru Wang ,&nbsp;Tong Li ,&nbsp;Ming-Yao Su ,&nbsp;Yan Chen ,&nbsp;Hai-Ying Wang ,&nbsp;Lan-Hong Dai","doi":"10.1016/j.jmps.2026.106517","DOIUrl":"10.1016/j.jmps.2026.106517","url":null,"abstract":"<div><div>Shear banding is widely regarded as a precursor to dynamic failure of solids, yet what drives its emergence remains elusive. Here, we precisely capture the onset of shear bands in the most typical Cantor CoCrFeMnNi high-entropy alloy via the unique single-pulse Hopkinson torsion bar-based deformation-freezing hybridizing synchronized temperature measurement technique. It is surprisingly found that shear bands emerge well before the stress-strain curve peak and exhibit a distinctive nanoscale morphology, in sharp contrast to traditional consensus. Precise microstructural characterization reveals that these bands originate from discrete stacking faults, where atomic-scale dilatation at their tips reduces shear deformation resistance and triggers configurational softening. To disentangle and quantify the competing effect between thermal softening and configurational softening, we develop a non-equilibrium two-temperature continuum plastic flow model. Stability analysis establishes the nanoscale shear band instability criterion and demonstrates that configurational softening, rather than widely accepted adiabatic thermal softening, governs their emergence. These findings shed new insights into understanding shear banding and dynamic failure behaviors in metals.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106517"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956824","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 unified multi-perspective quadratic manifold for mitigating the Kolmogorov barrier in multiphysics damage","authors":"Qinghua Zhang ,&nbsp;Stephan Ritzert ,&nbsp;Jian Zhang ,&nbsp;Jannick Kehls ,&nbsp;Stefanie Reese ,&nbsp;Tim Brepols","doi":"10.1016/j.jmps.2025.106499","DOIUrl":"10.1016/j.jmps.2025.106499","url":null,"abstract":"<div><div>In multiphysics damage problems, material degradation is often modeled using local and/or global damage variables, whose evolution introduces strong nonlinearities and significant computational costs. Linear projection-based reduced-order models (ROMs) are widely used to accelerate these simulations but often fail to capture complex nonlinear damage evolution effectively. This limitation arises from the slow decay of the Kolmogorov <em>n</em>-width, which leads to a phenomenon known as the Kolmogorov barrier in linear approximation. To overcome this challenge, this study proposes a novel unified multi-perspective (multi-field and multi-state) quadratic manifold-based ROM framework for thermo-mechanically coupled damage-plasticity problems. A key feature lies in a multi-field and multi-state decomposition strategy that is grounded in the material’s physical response to guide the selection of mode numbers for each coupled field. Moreover, the framework decouples both material states and physical fields, providing clearer insights into the contributions and interactions of each field within the overall multiphysics simulation. Benchmark tests demonstrate that the proposed approach mitigates the Kolmogorov barrier of linear projection-based ROMs by ensuring a smooth and monotonic decrease in error as the number of modes increases. The proposed multi-perspective quadratic manifold framework offers a robust and flexible approach for efficiently reducing complex damage-involved multiphysics problems and shows the potential for industrial applications.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106499"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894534","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":"Electro-mechanical wrinkling of soft dielectric films bonded to hyperelastic substrates","authors":"Bin Wu ,&nbsp;Linghao Kong ,&nbsp;Weiqiu Chen ,&nbsp;Davide Riccobelli ,&nbsp;Michel Destrade","doi":"10.1016/j.jmps.2025.106490","DOIUrl":"10.1016/j.jmps.2025.106490","url":null,"abstract":"<div><div>Active control of wrinkling in soft film-substrate composites using electric fields is a critical challenge in tunable material systems. Here, we investigate the electro-mechanical instability of a soft dielectric film bonded to a hyperelastic substrate, revealing the fundamental mechanisms that enable on-demand surface patterning. For the linearized stability analysis, we use the Stroh formalism and the surface impedance method to obtain exact and sixth-order approximate bifurcation equations that signal the onset of wrinkles. We derive the explicit bifurcation equations giving the critical stretch and critical voltage for wrinkling, as well as the corresponding critical wavenumber. We look at scenarios where the voltage is kept constant and the stretch changes, and vice versa. We provide the thresholds of the shear modulus ratio <span><math><msubsup><mi>r</mi><mrow><mrow><mi>c</mi></mrow></mrow><mn>0</mn></msubsup></math></span> or pre-stretch <span><math><msubsup><mi>λ</mi><mrow><mrow><mi>c</mi></mrow></mrow><mn>0</mn></msubsup></math></span> below which the film-substrate system wrinkles mechanically, prior to the application of a voltage. These predictions offer theoretical guidance for practical structural design, as the shear modulus ratio <em>r</em> and/or the pre-stretch <em>λ</em> can be chosen to be slightly greater than <span><math><msubsup><mi>r</mi><mrow><mrow><mi>c</mi></mrow></mrow><mn>0</mn></msubsup></math></span> and/or <span><math><msubsup><mi>λ</mi><mrow><mrow><mi>c</mi></mrow></mrow><mn>0</mn></msubsup></math></span>, so that the film-substrate system wrinkles with a small applied voltage. Finally, we simulate the full nonlinear behavior using the Finite Element method (<span>FEniCS</span>) to validate our formulas and conduct a post-buckling analysis. This work advances the fundamental understanding of electro-mechanical wrinkling instabilities in soft material systems. By enabling active control of surface morphologies via applied electric fields, our findings open new avenues for adaptive technologies in soft robotics, flexible electronics, smart surfaces, and bioinspired systems.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106490"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894540","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 strain rate behavior of liquid crystal elastomers","authors":"Adeline Wihardja ,&nbsp;Juan Carlos Nieto-Fuentes ,&nbsp;Daniel Rittel ,&nbsp;Kaushik Bhattacharya","doi":"10.1016/j.jmps.2026.106501","DOIUrl":"10.1016/j.jmps.2026.106501","url":null,"abstract":"<div><div>Liquid crystal elastomers are rubbery solids that couple liquid crystalline order and deformation. This coupling leads to properties that are attractive for a number of applications in soft robotics and energy absorption. This paper is motivated by the latter application, and provides a systematic experimental study of a particular class of liquid crystal elastomers – the isotropic genesis polydomain liquid crystal elastomers – over a wide range of strain rates in tension and compression. An important aspect of this study is a novel tensile drop-tower that enables tensile strain rates of 100 s<span><math><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> that are important to application but previously inaccessible. The paper also extends a recently proposed constitutive model to the high strain rate regime, and shows that it can be fit to describe the observed behavior across the full spectrum of loading conditions and strain rates examined.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106501"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145902452","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":"Mechanics of sequential damage in twisted fiber bundles across scales","authors":"Siqi Yan ,&nbsp;Xizhe Zhang ,&nbsp;Zhaoxin Zhang ,&nbsp;Zheng Jia ,&nbsp;Shuze Zhu","doi":"10.1016/j.jmps.2026.106516","DOIUrl":"10.1016/j.jmps.2026.106516","url":null,"abstract":"<div><div>Helical architectures are common in natural and engineered systems. It is well-known that the helical geometries, either formed naturally or engineered by twisting, can strongly influence mechanical properties. Nevertheless, existing theories have primarily examined the behavior of twisted fiber bundles until initial fiber rupture, and the understanding of the complete fracture process of all fibers is rather elusive. In this study, we show the counterintuitively such complete fracture process has non-trivial consequence. A generalized model that tracks the complete fracture process of twisted bundles, from initial rupture to ultimate failure, is proposed to capture the mechanical response of twisted bundles across length scales. The framework explicitly incorporates twist-mediated sequential fiber fracture and nonlocal bundle reconfiguration triggered by fiber breakage, which are two key mechanisms underlying the fracture response of twisted fiber bundles but absent from existing models. The theory produces quantitative predictions for the force-displacement response of twisted fiber bundles that closely match both macro-scale experiments and micro-scale simulations. Importantly, such model reveals a universal nonlocal energy dissipation mechanism that is intrinsic to the twisted geometry across scales. Furthermore, the model predicts the existence of a scale-dependent critical twist angle, beyond which a larger twist angle is correlated with higher dissipated energy. These results offer important theoretical insights for understanding the full mechanical prowess of twisted fiber materials with enhanced failure resistance.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106516"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956825","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":"Elastodynamics of two-dimensional odd mechanical media: Theory, homogenization and wave characterization","authors":"Wen Cheng ,&nbsp;Honghua Qian ,&nbsp;Shaoyun Wang ,&nbsp;Fan Yang ,&nbsp;Quan Wang ,&nbsp;Rui Zhu ,&nbsp;Gengkai Hu ,&nbsp;Guoliang Huang","doi":"10.1016/j.jmps.2026.106502","DOIUrl":"10.1016/j.jmps.2026.106502","url":null,"abstract":"<div><div>Non-Hermitian systems have attracted growing attention in mechanics due to their unique ability to manipulate energy in unconventional ways. In this study, we establish a comprehensive theoretical framework to explore exotic wave phenomena in odd elasticity. Specifically, we reveal polarization-dependent energy transfer in the unbroken-phase, second-order amplification at exceptional points (EPs), and exponential energy gain or loss in the broken-phase. To substantiate these findings, we perform an energy-based analysis within a homogeneous medium, offering clear physical interpretations that corroborate our theoretical predictions. Furthermore, we develop a homogenization theory to examine the elastodynamic behavior of various two-dimensional(2D) odd lattices constructed from tensile-torsional asymmetric springs. This theory is validated through comparisons of dispersion relations and coupled mode shapes with those obtained from microstructural simulations. The energy-transfer characteristics and directional wave amplification observed in the lattices closely align with the predictions of the homogenized model. Finally, we demonstrate unidirectional surface wave propagation and mode conversion as striking manifestations of non-Hermitian behavior in mechanical systems. This work provides a broadly applicable framework for investigating non-Hermitian effects in elastic wave systems and introduces novel strategies for the precise manipulation and control of mechanical energy.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106502"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956826","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":"Physics-informed neural networks enable quantitative characterization of viscoelastic properties from shear waves in multiple organs","authors":"Ziying Yin ,&nbsp;Yuxuan Jiang ,&nbsp;Yuxi Guo ,&nbsp;Jiayi Pu ,&nbsp;Shiyu Ma ,&nbsp;Guo-Yang Li ,&nbsp;Yanping Cao","doi":"10.1016/j.jmps.2025.106500","DOIUrl":"10.1016/j.jmps.2025.106500","url":null,"abstract":"<div><div>Tissue viscoelasticity has been recognized as a crucial biomechanical indicator for disease diagnosis and therapeutic monitoring. Conventional shear wave elastography techniques depend on dispersion analysis and face fundamental limitations in clinical scenarios. Particularly, limited wave propagation data with low signal-to-noise ratios, along with challenges in discriminating between dual dispersion sources stemming from viscoelasticity and finite tissue dimensions, pose great difficulties for extracting the dispersion relation. In this study, we introduce SWVE-Net, a framework for shear wave viscoelasticity imaging based on a physics-informed neural network (PINN). SWVE-Net circumvents dispersion analysis by directly incorporating the viscoelasticity wave motion equation into the loss functions of the PINN. Finite element simulations have revealed that SWVE-Net allows for the quantification of viscosity parameters within a wide range (e.g., 0.5 – 5 Pa·s). Remarkably, it can achieve this even for samples as small as a few millimeters, where substantial wave reflections and dispersion take place. <em>Ex vivo</em> experiments have demonstrated the broad applicability of SWVE-Net across various organ types, with shear moduli ranging from 2.13 to 5.96 kPa and viscosities from 1.26 to 2.00 Pa·s. In <em>in vivo</em> human experiments, SWVE-Net quantified breast and skeletal muscle tissues with shear moduli of 4.94 and 2.99 kPa and viscosities of 0.78 and 0.82 Pa·s, respectively. These results highlight the method's robustness under real-world imaging constraints. SWVE-Net overcomes the fundamental limitations of conventional elastography and enables reliable viscoelastic characterization in situations where traditional methods fall short. Therefore, it may have potential applications, for example in grading the severity of hepatic lipid accumulation, detecting myocardial infarction boundaries, and assisting in distinguishing between malignant and benign tumors.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106500"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Combining stretching-dominated and bending-dominated dissipation behavior to optimize energy absorption in liquid crystal elastomer-based lattice structures” [Journal of the Mechanics and Physics of Solids 209 (2026), 106497]","authors":"Beijun Shen ,&nbsp;Yuefeng Jiang ,&nbsp;Christopher M. Yakacki ,&nbsp;Sung Hoon Kang ,&nbsp;Thao D. Nguyen","doi":"10.1016/j.jmps.2026.106521","DOIUrl":"10.1016/j.jmps.2026.106521","url":null,"abstract":"","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106521"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033261","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":"Experimentally reconstructing the interplay of slip and microstructure in polycrystalline shape-memory alloys","authors":"Andrew Christison ,&nbsp;Harshad M. Paranjape ,&nbsp;Samantha Daly","doi":"10.1016/j.jmps.2026.106518","DOIUrl":"10.1016/j.jmps.2026.106518","url":null,"abstract":"<div><div>Shape-memory alloys (SMAs) such as NiTi (nitinol) can recover large strains through a reversible stress- or temperature-induced martensitic transformation, but cyclic transformation degrades reversibility. Recent evidence has linked this <em>functional fatigue</em> to the emission of dislocations from the fine-twinned martensitic microstructure that forms near the phase boundary, but the precise mechanism of slip-microstructure coupling is widely debated. This creates a mesoscale gap in the understanding of SMAs and their fatigue: multiscale simulation is prohibitively expensive, while experimental methodologies that can spatially resolve fine microstructure and individual dislocations (e.g., TEM) cannot capture bulk mechanical behavior.</div><div>In this work, we develop a new method to reconstruct the geometrically necessary martensitic transformation and plastic slip in polycrystalline SMAs from high-resolution, full-field deformation maps. Stress-induced martensitic transformation initiates in thin “shoots” passing through well oriented grains and saturates when poorly oriented grains have fully transformed. Localized networks of coupled slip and reorientation form microstructural bridges that propagate transformation through clusters of saturated grains. When loading in tension, this coupling of reorientation and slip underpins the motion of macroscopic Lüders-like localization bands. Contrary to recent theories focusing on dislocation emission from a Type II twin interface, we observe that the most intense slip localization events are coupled to the development of Type I twins.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106518"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145961739","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":"Capturing the fractocohesive length scale in elastomers through a statistical mechanics-based gradient enhanced damage model","authors":"S. Mohammad Mousavi ,&nbsp;Jason Mulderrig ,&nbsp;Brandon Talamini ,&nbsp;Nikolaos Bouklas","doi":"10.1016/j.jmps.2026.106504","DOIUrl":"10.1016/j.jmps.2026.106504","url":null,"abstract":"<div><div>This study aims to examine modeling flaw sensitivity in elastomers. The direct incorporation of polymer chain statistical mechanics considerations into a continuum stretch-based gradient-enhanced damage formulation, in turn, allows a representation of diffuse chain damage and fracture events that align with known micromechanical mechanisms. Through a series of numerical experiments, we simulate crack propagation and extract the fracture energy as an output of the model, while keeping track of the micromechanical signatures of diffuse chain damage that accommodate fracture propagation and eventually influence flaw sensitivity. Finally, by combining the fracture toughness and the work to rupture, we identify a fractocohesive length of the material, corresponding to the full width of the damage process zone. As the damage-to-fracture cascade in the proposed GED model is influenced by the introduction of a length scale associated with network imperfection and long-range load transfer, the emerging relationship of the two length scales is discussed, providing a potential link between microscopic damage mechanisms and the observed macroscopic fracture response.</div></div>","PeriodicalId":17331,"journal":{"name":"Journal of The Mechanics and Physics of Solids","volume":"209 ","pages":"Article 106504"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956828","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}