【新文速递】2025年9月6日固体力学SCI期刊最新文章_ACT_Mechanical

【新文速递】2025年6月17日固体力学SCI期刊最新文章

今日更新：International Journal of Solids and Structures 2 篇，Journal of the Mechanics and Physics of Solids 1 篇，International Journal of Plasticity 1 篇，Thin-Walled Structures 1 篇International Journal of Solids and StructuresLocal formability and bendability of UHSS: Correlations between bending and tensile fracture strainsAki-Petteri Pokka, Vili Kesti, Antti Kaijalainendoi:10.1016/j.ijsolstr.2025.113524 超高强度聚苯乙烯的局部可成形性和可弯曲性：弯曲应变与拉伸断裂应变之间的相关性This study investigates the correlation between bendability and local formability properties of six ultra-high strength steel (UHSS) grades using small radius air-bending tests, uniaxial tensile tests, and plane-strain tensile tests with grooved specimens. Digital image correlation (DIC) was employed to measure surface strains, while post-mortem thickness measurements provided through-thickness strain data from the tensile tests. A novel strain-based method was used for bending fracture detection, offering improved accuracy over conventional methods such as the load drop thresholds defined in the VDA 238-100 specification. The bending fracture strain showed a moderate correlation (R2 = 0.73) with the plane-strain tensile fracture thickness strain. In contrast, correlations between bending fracture strain and uniaxial tensile fracture measures were weak (R2 = 0.38–0.53). No clear relationships were found between bending fracture strain and conventional tensile parameters such as total elongation or strain hardening exponent. The findings of this paper highlight the complexities in predicting bendability from tensile measures due to stress state differences and underscore the importance of bending tests for accurate characterization of sheet metal formability.本研究采用小半径空气弯曲试验、单轴拉伸试验和带槽试样的平面应变拉伸试验，研究了六种超高强度钢（UHSS）的弯曲性和局部可成形性之间的相关性。数字图像相关（DIC）被用来测量表面应变，而死后厚度测量则提供了拉伸试验的通厚应变数据。在弯曲断裂检测中使用了一种基于应变的新方法，与传统方法（如 VDA 238-100 规范中定义的载荷下降阈值）相比，该方法的准确性更高。弯曲断裂应变与平面应变拉伸断裂厚度应变呈中等相关性（R2 = 0.73）。相比之下，弯曲断裂应变与单轴拉伸断裂测量之间的相关性较弱（R2 = 0.38-0.53）。弯曲断裂应变与传统拉伸参数（如总伸长率或应变硬化指数）之间没有明确的关系。本文的研究结果凸显了由于应力状态差异而导致的通过拉伸测量预测弯曲性的复杂性，并强调了弯曲试验对于准确表征金属板成型性的重要性。Bending and vibration analyses of functionally graded auxetic doubly curved shells via dual mesh control domain modelZeyu Jiao, Shaoyu Zhao, Guannan Wang, Rongqiao Xu, Jie Yangdoi:10.1016/j.ijsolstr.2025.113526通过双网格控制域模型对功能分级辅助双曲面壳体进行弯曲和振动分析This paper presents a novel dual mesh control domain (DMCD) model for the static bending and free vibration analysis of functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) doubly curved shells within the framework of the first-order shear deformation theory and modified Sanders assumptions. The shell consists of multilayered GOEAMs where the GOri content varies across the shell thickness in a layer-wise manner, leading to graded variations in auxetic and other material properties. Genetic programming (GP)-assisted micromechanical models are employed to estimate the material properties, including Poisson’s ratio, Young’s modulus, coefficient of thermal expansion (CTE), and mass density of the GOEAM in each layer. Governing equations are derived by the principle of virtual work and numerically solved using the dual mesh control domain method (DMCDM). The accuracy and convergence of the DMCD model are first verified, followed by a systematic investigation of the effects of GOri content, folding degree, temperature, and length-to-thickness ratio on the bending deflection, normal stress and fundamental frequency of FG-GOEAM doubly curved shells. The numerical results provide valuable insights for designing FG-GOEAM doubly curve shells in aerospace engineering with tunable negative Poisson’s ratio and enhanced mechanical properties.本文提出了一种新型双网格控制域（DMCD）模型，用于在一阶剪切变形理论和修正的桑德斯假设框架内，对功能分级（FG）石墨烯折纸（GOri）辅助超材料（GOEAM）双曲面壳体进行静态弯曲和自由振动分析。该外壳由多层 GOEAM 组成，其中 GOri 的含量在整个外壳厚度上以逐层方式变化，从而导致辅助材料和其他材料特性的分级变化。采用遗传编程（GP）辅助微机械模型来估算材料特性，包括泊松比、杨氏模量、热膨胀系数（CTE）和每层 GOEAM 的质量密度。根据虚功原理推导出控制方程，并使用双网格控制域法（DMCDM）进行数值求解。首先验证了 DMCD 模型的准确性和收敛性，然后系统地研究了 GOri 含量、折叠度、温度和长厚比对 FG-GOEAM 双曲壳的弯曲挠度、法向应力和基频的影响。数值结果为在航空航天工程中设计具有可调负泊松比和增强机械性能的 FG-GOEAM 双曲面壳体提供了宝贵的启示。Journal of the Mechanics and Physics of SolidsStatic topological mechanics: from space-time duality to localized deformationsAoxi Wang, Chang Qing Chendoi:10.1016/j.jmps.2025.106248静态拓扑力学：从时空对偶到局部变形Manipulating localized static deformations in materials that are otherwise sensitive to stochastic imperfections and impurities is a long-standing pursuit in solid mechanics. Developments in topological physics have unveiled an unprecedented paradigm for steering robust, localized transport of mass and energy and have been extended to classical dynamic mechanical systems, known as topological mechanics. Recently, Wang, Zhou, and Chen (2023) showed that phonons are not the only elementary excitations in topological mechanics; topology is also inherent in static load-induced mechanical deformations of lattice materials and elastic continua. In these quasistatic and frequency-irrelevant systems, topologically nontrivial modes manifest as ordered static deformations localized at boundaries or interfaces, providing a new method to rationally regulate localized deformations so that they are robust against structural disorders and defects. In this review, we introduce the fundamental concepts of this topology, referred to as static topological mechanics, emphasizing the space-time duality and the imaginary time transformation between static and associated wave dynamic systems. We outline several archetypal topological states reconstructed in static mechanical systems, including topological zero modes, multipole higher-order topologies, and non-Hermitian topologies. In parallel with their dynamic counterparts, robust static topologies can be harnessed to customize localized deformations, such as constructing multidirectional stress guides in lattice materials. This review concludes by envisioning future challenges and opportunities in static topological mechanics.控制材料的局部静态变形是固体力学领域的一项长期追求，因为材料对随机缺陷和杂质非常敏感。拓扑物理学的发展为引导质量和能量的稳健局部传输揭示了一种前所未有的范式，并已扩展到经典动态力学系统，即拓扑力学。最近，Wang、Zhou 和 Chen（2023 年）的研究表明，声子并不是拓扑力学中唯一的基本激元；拓扑学也是晶格材料和弹性连续体的静态负载诱导机械变形的固有特性。在这些准静态和频率无关的系统中，拓扑非琐碎模态表现为边界或界面局部的有序静态变形，为合理调节局部变形提供了一种新方法，使其能够抵御结构紊乱和缺陷。在这篇综述中，我们将介绍这种拓扑学的基本概念，即静态拓扑力学，并强调静态系统与相关波动力系统之间的时空对偶性和虚时间转换。我们概述了在静态力学系统中重建的几种典型拓扑状态，包括拓扑零模、多极高阶拓扑和非赫米提拓扑。在动态拓扑的同时，还可以利用稳健的静态拓扑来定制局部变形，例如在晶格材料中构建多向应力导向。本综述最后展望了静态拓扑力学的未来挑战与机遇。International Journal of PlasticityA general, flexible and analytical yield criterion framework developed from a novel strategy: Gradual surface-distortionYao Zhou, Qi Hu, Jun Chendoi:10.1016/j.ijplas.2025.104394 从新颖的策略中开发出通用、灵活和分析性的产量标准框架：渐进式表面变形Yield criterion with concise parameters and high accuracy has always been recommended for industrial applications. Based on a novel modeling strategy of gradual surface-distortion (GSD), an analytical yield criterion framework is constructed under the associated flow rule, integrating simplicity, generality and flexibility. Derived from structures of SY2009 criterion, R-value and curvature control terms with independent parameter calibration are developed, resulting in yield surface distortion occurring gradually. Three curvature variables are integrated into a single factor through empirical formulas without additional pure shear and plane strain tension experiments. This framework is an eighth-order homogeneous polynomial, with all parameters uniquely determined through a set of mechanical tests conducted under plane stress conditions. Initially, a simplified GSD version is constructed to characterize yield loci of BCC and FCC materials, requiring a minimum of only seven experimental data (T0, T45, T90, TEB, r0, r45, r90). Subsequently, by introducing stresses and R-values in two optional directions, an extended GSD version is proposed to enhance strong anisotropy description. The generality and accuracy of this framework are validated across 19 different materials to predict yield locus, uniaxial stress and R-value curves. The results demonstrate that the simplified model almost replicates Yld2000-2d and enables accurate prediction in the evolution of yield locus under anisotropic hardening. For strongly anisotropic materials, the extended model exhibits high prediction accuracy. By using an implicit finite element method, this framework accurately predicts the earing profile in cup drawing of AA3104-H19. Besides, the convexity trust-domain and the generality of curvature variables are discussed.具有简洁参数和高精度的屈服准则一直被推荐用于工业应用。基于一种新颖的渐进表面变形（GSD）建模策略，在关联流动法则下构建了一个分析屈服准则框架，该框架集简单性、通用性和灵活性于一体。从 SY2009 准则的结构出发，开发了具有独立参数校准的 R 值和曲率控制项，从而导致屈服面逐渐变形。通过经验公式将三个曲率变量整合为一个单一因素，无需额外的纯剪切和平面应变拉伸实验。该框架是一个八阶齐次多项式，所有参数通过在平面应力条件下进行的一组机械试验唯一确定。最初，构建了一个简化的 GSD 版本来表征 BCC 和 FCC 材料的屈服轨迹，仅需要最少的七个实验数据（T0、T45、T90、TEB、r0、r45、r90）。随后，通过引入两个可选方向的应力和 R 值，提出了一个扩展的 GSD 版本，以增强对强各向异性的描述。该框架的通用性和准确性在 19 种不同材料上得到了验证，用于预测屈服轨迹、单轴应力和 R 值曲线。结果表明，简化模型几乎复制了 Yld2000-2d，并且能够准确预测各向异性硬化下屈服轨迹的演变。对于强各向异性材料，扩展模型表现出很高的预测精度。通过使用隐式有限元法，该框架能够准确预测 AA3104-H19 材料杯拉深过程中的耳形轮廓。此外，还讨论了凸度信任域和曲率变量的通用性。Thin-Walled StructuresEXPERIMENTAL AND NUMERICAL ASSESSMENT OF H500 AUSTENITIC STAINLESS STEEL IN STEEL-FRAMED STRUCTURES AFTER FIRE EXPOSUREHadi El Samad, Katherine A. Cashell, Luke Lapiradoi:10.1016/j.tws.2025.113587火灾暴露后钢架结构中 H500 奥氏体不锈钢的实验和数值评估This paper investigates the post-fire behaviour of H500 austenitic stainless steel and its impact on the performance of steel-framed structures after a fire. Understanding the residual properties of structural materials following exposure to elevated temperatures and subsequent cooling is crucial for assessing structural safety, enabling reuse, and avoiding unnecessary demolition. Additionally, this knowledge is essential for evaluating stability during post-fire salvage and rescue operations to ensure emergency personnel safety. A series of post-fire experiments were conducted to determine the residual mechanical properties and microstructural changes of H500 stainless steel after different heating and cooling regimes. The results indicate that specimens rapidly cooled by submersion in cold water exhibit significant degradation in elastic properties and yield strength, particularly within specific temperature ranges. These experimental findings inform a newly developed nonlinear finite element model, which assesses the post-fire residual capacity of steel-framed structures with H500 stainless steel joints. The performance is compared with high-strength carbon steel and other stainless steel grades. The findings provide valuable insights to guide future research on the post-extreme-event resilience of structural components using H500 stainless steel.本文研究了 H500 奥氏体不锈钢的火灾后行为及其对火灾后钢架结构性能的影响。了解结构材料在暴露于高温和随后冷却后的残余特性对于评估结构安全、实现再利用和避免不必要的拆除至关重要。此外，这些知识对于评估火灾后抢救和救援行动中的稳定性以确保应急人员的安全也至关重要。我们进行了一系列火灾后实验，以确定 H500 不锈钢在不同加热和冷却机制下的残余机械性能和微观结构变化。结果表明，浸入冷水中快速冷却的试样会出现明显的弹性性能和屈服强度下降，尤其是在特定的温度范围内。这些实验结果为新开发的非线性有限元模型提供了依据，该模型评估了带有 H500 不锈钢连接件的钢架结构的火灾后剩余能力。并将其性能与高强度碳钢和其他等级的不锈钢进行了比较。研究结果为指导未来对使用 H500 不锈钢的结构部件在极端事件后的恢复能力进行研究提供了宝贵的见解。来源：复合材料力学仿真Composites FEM