【新文速递】2025年9月14日固体力学SCI期刊最新文章

今日更新：Journal of the Mechanics and Physics of Solids 1 篇，Mechanics of Materials 1 篇，International Journal of Plasticity 1 篇，Thin-Walled Structures 6 篇Journal of the Mechanics and Physics of SolidsBuckling and imperfection sensitivity of fluctuating one and two dimensional nanostructuresXin Yan, Md Sojib Kaisar, Rubayet Hassan, Fatemeh Ahmadpoordoi:10.1016/j.jmps.2025.106342波动一维和二维纳米结构的屈曲和缺陷敏感性Thermal fluctuations significantly influence the mechanical behavior of low-dimensional elastic nanostructures due to their s mall bending stiffness. In this work, we develop a theoretical framework to investigate the buckling behavior of one- and two-dimensional flexible structures, namely, elastic rods and crystalline membranes, particularly when they experience large thermal fluctuations. Beginning with a thermally fluctuating elastic rod, we show that classical Euler buckling is recovered when geometric nonlinearities are neglected. Incorporating nonlinearities reveals substantial deviations in force–extension behavior, especially for rods with low bending stiffness. Extending the an alysis to crystalline membranes, modeled through a nonlinear von Kármán elasticity of plate, we derive scaling laws for the critical buckling strain as functions of temperature, system size, and further explore their imperfection sensitivity. Our findings show that although imperfections can substantially alter the buckling threshold at zero Kelvin, their influence could be diminished at finite temperatures due to the presence of thermal fluctuations. Further, our results highlight the essential interplay between entropy-driven fluctuations and mechanical instabilities in low-dimensional systems, offering insights relevant to the design of thermally robust nanoscale materials and devices.由于低维弹性纳米结构的弯曲刚度小，热波动对其力学行为有显著影响。在这项工作中，我们开发了一个理论框架来研究一维和二维柔性结构（即弹性棒和晶体膜）的屈曲行为，特别是当它们经历较大的热波动时。从热波动弹性杆开始，我们证明了当几何非线性被忽略时，经典欧拉屈曲可以恢复。结合非线性揭示了力延伸行为的实质性偏差，特别是对于低弯曲刚度的杆。将分析扩展到晶体膜，通过非线性von Kármán板弹性模型，我们推导了临界屈曲应变随温度、系统尺寸的标度规律，并进一步探讨了它们的缺陷敏感性。我们的研究结果表明，尽管缺陷可以在零开尔文时大大改变屈曲阈值，但由于热波动的存在，它们的影响可以在有限温度下减弱。此外，我们的研究结果强调了低维系统中熵驱动波动和机械不稳定性之间的基本相互作用，为热鲁棒纳米级材料和器件的设计提供了相关见解。Mechanics of MaterialsThermo-mechanical experiments for deformation twinning in high-purity titaniumAkhilesh Pedgaonkar, Anderson Nascimento, Irene J. Beyerlein, Curt A. Bronkhorstdoi:10.1016/j.mechmat.2025.105479高纯钛变形孪晶的热力学实验We present thermomechanical experiments with high-resolution Electron Back Scatter Diffraction (EBSD) maps to study deformation twinning in high-purity α titanium. The experiments were simple compression tests conducted at room temperature (23 °C) and cold temperature (-45 °C to -60 °C). Large strain experiments (strain ɛ=0.4) were conducted to understand the overall thermo-mechanical response of the material. S mall-strain experiments (strain ɛ = 0.03 to 0.05) were conducted and an alyzed with EBSD to study the nucleation and evolution of deformation twins. We observed that the twin area fraction increases with strain for both room and cold temperature samples, but the mechanis ms are distinct at s mall strains. Thickening of twins is prominent at room temperature, whereas the formation of new twins is prominent at cold temperatures. The twinning an alysis also reveals that Basinski-type hardening has a significant impact on the early-stage hardening. There is also some evidence to suggest that more twins nucleate inside the grains rather than at the grain boundaries at colder temperatures. This work aims to provide a dataset for validating crystal plasticity models for deformation twinning in titanium.我们通过高分辨率电子背散射衍射（EBSD）图谱进行热机械实验，以研究高纯度α钛中的变形孪晶。实验包括在室温（23°C）和低温（-45°C 至 -60°C）下进行的简单压缩测试。进行了大应变实验（应变ɛ=0.4），以了解材料的整体热机械响应。还进行了小应变实验（应变ɛ = 0.03 至 0.05），并用 EBSD 进行分析，以研究变形孪晶的成核和演变。我们观察到，无论是室温还是低温样品，孪晶面积分数均随应变增加而增大，但在小应变时机制有所不同。在室温下孪晶增厚明显，而在低温下新孪晶的形成更为显著。孪晶分析还表明，巴辛斯基型硬化对早期硬化有显著影响。还有些证据表明，在较低温度下，孪晶更多地在晶粒内部而非晶界处成核。本研究旨在为钛材料变形孪生的晶体塑性模型验证提供一个数据集。International Journal of PlasticityUsing mechanical equilibrium to correct HR-EBSD stress measurementsEralp Demir, Anna Kareer, Chris Hardie, Edmund Tarletondoi:10.1016/j.ijplas.2025.104464利用机械平衡校正HR-EBSD应力测量值High-resolution electron-backscatter diffraction (HR-EBSD) is widely adopted as a method to obtain local stress and strain distributions in both single-crystal and polycrystalline materials. In this study, we develop a finite element-based method that serves as a numerical correction to refine the relative stress measurements captured experimentally from HR-EBSD and to ensure that the measurements satisfy mechanical equilibrium and traction-free surface constraints. The method provides a calculation of stress for each of the reference points instead of assuming the reference point stresses are zero, capturing the grain-to-grain variation in polycrystalline EBSD maps. The experimental data including a cross section of nanoindentation in unirradiated and heavy-ion-irradiated single-crystals of iron as well as polycrystalline austenitic stainless steel are ana lysed, and the method improves the measured stresses near slip bands, grain boundaries, and hard phases while keeping the stresses physically consistent with mechanical equilibrium and ensuring that free surfaces are traction-free. The three-dimensional an alysis enables the fulfilment of traction-free surface constraints, resulting in zero out-of-plane shear stress components on the free surfaces while maintaining nonzero out-of-plane shear stress components below the surface. To demonstrate the validity of this approach, the method is applied to synthetically generated relative stress data for a uniform bending case, and the method successfully predicts the stress distributions.高分辨率电子背散射衍射（HR-EBSD）作为一种获得单晶和多晶材料局部应力应变分布的方法被广泛采用。在本研究中，我们开发了一种基于有限元的方法，作为数值校正，以改进从HR-EBSD实验中捕获的相对应力测量，并确保测量结果满足机械平衡和无牵引力表面约束。该方法为每个参考点提供应力计算，而不是假设参考点应力为零，从而捕获多晶EBSD图中晶粒间的变化。对未辐照和重离子辐照单晶铁和多晶奥氏体不锈钢的纳米压痕截面实验数据进行了分析，结果表明，该方法提高了滑移带、晶界和硬相附近的应力测量值，同时保持了应力与力学平衡的物理一致，并确保了自由表面无牵引力。三维分析能够满足无牵引力的表面约束，从而使自由表面上的面外剪应力分量为零，而表面以下的面外剪应力分量为非零。为了验证该方法的有效性，将该方法应用于均匀弯曲情况下综合生成的相对应力数据，并成功地预测了应力分布。Thin-Walled StructuresFree vibration an alysis of FGM non-coplanar plate assemblies with arbitrary boundary conditions through a novel an alytic methodKun Xie, Yaqi Tian, Cong Zhang, Meixia Chendoi:10.1016/j.tws.2025.113958用一种新的解析方法分析任意边界条件下FGM非共面板组件的自由振动A novel an alytic model is proposed for free vibration ana lysis of FGM non-coplanar plate assemblies with arbitrary boundary conditions. To establish the governing equation, the titled structures are firstly decomposed to several independent rectangular plates. The first-order shear deformation theory (FSDT) and the superposition method are employed, and both out-of-plane and in-plane displacements and forces are simultaneously expressed as some unknowns. Then, continuity conditions at coupling edges are utilized to assemble all plates, and displacements at other edges are restrained by artificial springs. By virtue of the orthonormal properties of trigonometric functions, continuity and boundary conditions become a series of algebraic equations, which are integrated to form the final governing equation. To evaluate the accuracy and application, natural frequencies of four different models are compared, and present results agree well with ones of the literature, finite element method and modal testing. Furthermore, influences of material parameters, elastic boundary conditions and discontinuity conditions are carried out. The results reveal that major differences between FGM and homogenous L-shaped plates are natural frequencies and mode shapes keep unchanged. The increase of coupling angle can efficiently increase natural frequencies as the coplanar plate becomes non-coplanar L-shaped one, and natural frequencies slightly change as the nonzero coupling angle further increases. Three discontinuity conditions including the coupling angle, coupling location and thickness can obviously affect natural frequencies of L-shaped plates.提出了一种新的分析任意边界条件下FGM非共面板组件自由振动的解析模型。为了建立控制方程，首先将标题结构分解为几个独立的矩形板。采用一阶剪切变形理论（FSDT）和叠加法，将面外和面内位移和力同时表示为未知量。然后，利用耦合边缘的连续性条件将所有板装配在一起，其他边缘的位移由人工弹簧约束。利用三角函数的正交性，连续性和边界条件成为一系列代数方程，这些方程被积分形成最终的控制方程。为了评价模型的精度和应用，比较了四种不同模型的固有频率，所得结果与文献、有限元法和模态试验结果吻合较好。此外，还研究了材料参数、弹性边界条件和不连续条件的影响。结果表明，FGM板与均匀l型板的主要区别在于固有频率和模态振型不变。随着耦合角的增大，共面板变为非共面l型板时，固有频率有效提高，而随着非零耦合角的进一步增大，固有频率变化不大。耦合角度、耦合位置和厚度等3种不连续条件对l型板的固有频率有明显影响。Temperature and time dependences of fragment generation and out-of-plane deformation in fractured tempered glass laminatesDongdong Xie, Jian Yang, Xing-Er Wang, Yige Wang, Zhufeng Pan, Chenjun Zhaodoi:10.1016/j.tws.2025.113959 破碎钢化玻璃层合板碎片生成及面外变形的温度和时间依赖性The fragment number and out-of-plane deformation in tempered glass laminated with temperature- and time-dependent interlayers, which are important results after glass breakage, significantly affect the tension stiffening effect in post-fracture laminated glass (LG) and its geometrical imperfection, respectively. This paper explored the two objective physical quantities based on the fragmentation experiment. The study would contribute to the performance assess ment and prediction of LG in the Post Fracture Limit State. The ionomer (SentryGlas®, SG), modified ethylene-vinyl acetate (PVE®), and PVE-based composite interlayers (SGE®) were considered. The testing temperatures were set at 20°C, 50°C, and 80°C. Besides, long-term monitoring of the examined objectives was conducted based on voice recording and distance measurement. The results reveal that a stiffer interlayer can restrict the fragment generation and number in LG compared with monolithic glass (MG), whereas the influence weakens with increasing temperature. The fragment number in SG LG decreases by 30.91% and 27.98% compared to MG with the same surface stress at 20°C and 50°C, respectively. In addition, the temperature rise for all series and the thicker polycarbonate layer for SGE series result in decreased out-of-plane deformation. The stiffer SGE has a weaker restriction on the fragment number. Furthermore, the fragment number gradually increases due to the generation of secondary cracks. The increase within the first 15 minutes after glass fracture becomes more pronounced as the temperature rises. The time dependence of fracture-induced out-of-plane deformation in LG exhibits complicated patterns, where the variation trend at 20°C is contrary to that observed at 50°C and 80°C.温度和时间相关夹层夹胶钢化玻璃的碎片数和面外变形是玻璃破碎后的重要结果，它们分别显著影响破裂后夹层玻璃（LG）的拉伸加劲效果及其几何缺陷。本文在破碎实验的基础上，探索了两个客观物理量。研究结果可为LG在断裂后极限状态下的性能评价和预测提供依据。考虑了离聚体（sentryglass®，SG）、改性乙烯-醋酸乙烯酯（PVE®）和基于PVE的复合中间层（SGE®）。测试温度分别设置为20℃、50℃和80℃。此外，通过录音和距离测量对被测目标进行了长期监测。结果表明：与单片玻璃（MG）相比，更硬的夹层可以限制LG玻璃碎片的产生和数量，但随着温度的升高，这种影响减弱。在20°C和50°C条件下，SG LG的片段数比相同表面应力条件下的MG分别减少了30.91%和27.98%。此外，所有系列的温度升高和SGE系列的聚碳酸酯层较厚导致面外变形减小。较硬的SGE对片段数的限制较弱。此外，由于二次裂纹的产生，碎片数逐渐增加。随着温度的升高，玻璃破裂后15分钟内的升高更为明显。LG断裂诱发面外变形的时间依赖性表现出复杂的模式，其中在20℃时的变化趋势与在50℃和80℃时的变化趋势相反。Experimental and numerical study on ballistic performance of a sandwich composite plate with biomimetic tendon basalt filament bundles (SCP-BTBFB)Yanyan Chu, Jingyu Xu, Xucai Wang, Baokun Zhu, Tao Peng, Yue Zhang, Jinhaitong Zou, Zhao Zhang, Chenhui Jiao, Chaoying Maodoi:10.1016/j.tws.2025.113960仿生肌腱玄武岩纤维束夹心复合材料板（SCP-BTBFB）弹道性能的实验与数值研究Currently, basalt fiber provides a solid support for protective effects due to its high mechanical properties, and its excellent ballistic protection capability is particularly in line with the core requirements of this field. Meanwhile, it also possesses the characteristics of low cost, environmental friendliness and diverse environmental adaptability, thus becoming an ideal alternative to traditional composite materials in the current ballistic protection field. This study developed a sandwich composite plate with biomimetic tendon basalt filament bundles (SCP-BTBFB), using basalt filament bundles as the core and CFRP as face panels. Ballistic impact experiments (7.62 mm pistol bullets, 445 m/s initial velocity) and Abaqus simulations systematically investigated the effects of core height (5-20 mm), impact position, and winding fibers (UHMWPE, Aramid, LCP) on ballistic performance. Results show increasing core height enhances stiffness and reduces residual velocity, with 12.5 mm core achieving optimal SEA (4 J/g). Impacting four filament bundles yields highest energy absorption efficiency (damage volume as a key factor). Aramid-wrapped cores show maximum energy absorption (365.6 J) due to high impact toughness. The study reveals damage mechanis ms: front panel shear failure, core filament fracture/extrusion, and rear panel delamination/warping, confirming that synergies between core microstructure and fiber properties are critical for ballistic performance, providing a basis for lightweight protective material design. Furthermore, to further optimize the structural performance, future work will adopt schemes such as modifying fiber materials, interfacial modification, and gradient core layers to further balance costs and improve performance, which is expected to provide some assistance for the field of lightweight protective materials.目前，玄武岩纤维由于其较高的力学性能为防护效果提供了坚实的支撑，其优异的防弹道能力尤其符合该领域的核心要求。同时，它还具有成本低、环境友好和多样化的环境适应性等特点，成为当前弹道防护领域替代传统复合材料的理想选择。本研究以玄武岩纤维束为芯材，CFRP为面材，研制了仿生肌腱玄武岩纤维束夹心复合材料板（SCP-BTBFB）。弹道冲击实验（7.62 mm手 枪子 弹，初始速度445 m/s）和Abaqus模拟系统地研究了芯高度（5-20 mm）、冲击位置和缠绕纤维（UHMWPE、芳纶、LCP）对弹道性能的影响。结果表明，增加岩心高度可以提高刚度并降低残余速度，12.5 mm岩心的SEA最佳（4 J/g）。冲击四个长丝束产生最高的能量吸收效率（损伤体积是一个关键因素）。芳纶包芯具有较高的冲击韧性，吸能最大（365.6 J）。研究揭示了损伤机制：前面板剪切破坏、芯材断裂/挤压、后面板分层/翘曲，证实了芯材微观结构和纤维性能之间的协同作用对弹道性能至关重要，为轻量化防护材料设计提供了基础。此外，为了进一步优化结构性能，未来的工作将采用改性纤维材料、界面改性、梯度核心层等方案，进一步平衡成本，提高性能，有望为轻量化防护材料领域提供一定的帮助。Cold-formed steel octagonal hollow section (OctHS) beam-columns: Numerical studies and design recommendationsHaixin Liu, Jiong-Yi Zhu, Junbo Chen, Tak-Ming Chandoi:10.1016/j.tws.2025.113963冷弯型钢八角空心截面（OctHS）梁柱：数值研究和设计建议This paper first proposes a generalised finite element modelling (FEM) methodology for the cold-formed steel tubular beam-columns considering the material variation, initial geometric imperfection, and boundary condition. The proposed FE model is proven to be capable of accurately replicating the structural behaviour of cold-formed steel rectangular hollow section and circular hollow section beam-columns regarding the obtained ultimate strengths and axial load versus mid-height lateral deflection curves. Following the successful validation of generalised FEM methodology, this methodology is extended to the numerical modelling of the cold-formed steel octagonal hollow section beam-column. A total of 5246 numerical models of the OctHS beam-column covering a broad spectrum of steel grades, geometric profiles, and loading eccentricities are subsequently generated to form an essential database. Based on the evaluation of numerical results, design recommendation and modification to the current standards for structural steel design have been proposed to improve the prediction accuracy. Corresponding reliability ana lyses following different evaluation procedures are also performed, and the reliability ana lysis results indicate the effectiveness of the design recommendation and modification.本文首先提出了一种考虑材料变化、初始几何缺陷和边界条件的冷弯钢管梁柱广义有限元建模方法。所提出的有限元模型被证明能够准确地复 制冷弯型钢矩形空心截面和圆形空心截面梁柱的结构行为，关于所获得的极限强度和轴向载荷与中高度横向挠度曲线。在对广义有限元方法进行成功验证后，将该方法推广到冷弯型钢八角形空心截面梁柱的数值模拟中。随后生成了5246个OctHS梁柱的数值模型，涵盖了广泛的钢种、几何轮廓和加载偏心，形成了一个基本的数据库。在对数值结果进行评价的基础上，提出了设计建议和对现行结构钢设计标准的修改，以提高预测精度。采用不同的评估方法进行了相应的可靠性分析，可靠性分析结果表明了设计建议和修改的有效性。Hysteretic performance of steel plate shear wall reinforced with PET-infilled diagonal CFRP multi-layer corrugated plateChu Zhao, Jinguang Yu, Weihui Zhongdoi:10.1016/j.tws.2025.113968pet填充斜向CFRP多层波纹板加固钢板剪力墙的滞回性能To further improve the buckling-restrained effect of carbon fiber reinforced polymer (CFRP) components, several new diagonal CFRP corrugated plate-steel plate composite shear walls are proposed. Taking the conventional steel plate shear wall (SPSW) and the diagonal CFRP corrugated plate-steel plate composite shear wall with adhesive connection (number: S-FRP-A) as the baselines, the diagonal CFRP double-layer corrugated plate-steel plate composite shear wall (number: S-DFRP) and the polyethylene terephthalate (PET) -infilled diagonal CFRP corrugated plate-steel plate composite shear wall (number: S-FRP-PET) with adhesive-bolt hybrid connection are introduced. Then, the seis mic performances of the four SPSW structures are compared by the quasi-static cyclic test, and the finite element (FE) ana lysis is conducted to suggest optimized design schemes. The test results demonstrate that the restrained scheme S-FRP-A reduces the absolute values of the maximum out-of-plane deformation in wall plate by 29.67 %, while the schemes S-DFRP and S-FRP-PET achieve reductions of 63.24 % and 69.91 %. The schemes S-DFRP and S-FRP-PET increased the initial stiffnesses of SPSWs by 17.32 % and 30.78 %, where the scheme S-FRP-PET increased the displacement ductility coefficients and cumulative energy dissipation by 30.81 % and 25.44 %. The FE ana lysis recommends the PET-infilled full CFRP double-layer corrugated plate-steel plate composite shear wall with trapezoidal corrugated sections as the optimized design scheme.为了进一步提高碳纤维增强聚合物（CFRP）构件的抗屈曲效果，提出了几种新型CFRP斜向波纹板-钢板复合剪力墙。以常规钢板剪力墙（SPSW）和粘结连接对角线CFRP波纹板-钢板复合剪力墙（编号：S-FRP-A）为基础，介绍了CFRP双层对角线波纹板-钢板复合剪力墙（编号：S-DFRP）和PET填充对角线CFRP波纹板-钢板复合剪力墙（编号：S-FRP-PET）粘结-螺栓混合连接。然后，通过准静力循环试验对4种SPSW结构的抗震性能进行比较，并进行有限元分析，提出优化设计方案。试验结果表明，约束方案S-FRP-A使墙板最大面外变形绝对值降低了29.67%，而S-DFRP和S-FRP-PET方案的最大面外变形绝对值分别降低了63.24%和69.91%。S-DFRP和S-FRP-PET方案分别提高了spsw的初始刚度17.32%和30.78%，其中S-FRP-PET方案分别提高了位移延性系数30.81%和累积耗能25.44%。有限元分析建议采用pet填充全CFRP双层波纹板-钢板组合剪力墙的梯形波纹截面作为优化设计方案。Dynamic response of operating wind turbines under near-field and far-field earthquakes: experimental study through combined wind tunnel and shaking table testsBaowei Ma, Annan Zhou, Kun Lindoi:10.1016/j.tws.2025.113943近场和远场地震作用下运行风力发电机组的动力响应：风洞与振动台联合试验研究This study investigates the seis mic responses of wind turbines under combined wind and earthquake excitations, with specific focus on near-field (Chi-Chi) and far-field (Superstition) ground motions. A series of wind tunnel-shaking table joint tests were conducted on a 1:100 scaled wind turbine model to capture both peak and cumulative structural responses. Results show that near-field excitation leads to significantly greater nacelle displacement, acceleration, amplification, and base moment than far-field excitation, with clear response variation as peak ground acceleration (PGA) increases. Time-frequency ana lysis reveals that near-field motions are characterized by impulsive energy input over medium-to-high frequencies, while far-field excitations deliver relatively low-frequency, long-duration energy. Wind load contributes to seis mic response by amplifying peak displacements and may increase nacelle fatigue risk. Cumulative displacement of wind turbines is strongly influenced by wind load. When the turbine is operating, the combined effect of wind and seis mic loading leads to much greater overall displacement over time compared to when the turbine is shut down. These findings highlight the necessity of incorporating both ground motion characteristics and operational wind loading in the seis mic design and nacelle fatigue assess ment of wind turbines.本研究研究了风力涡轮机在风震联合激励下的地震响应，特别关注近场（Chi-Chi）和远场（Superstition）地面运动。在1:100比例的风力机模型上进行了一系列风洞-振动台联合试验，以捕获峰值和累积结构响应。结果表明，与远场激励相比，近场激励导致的短舱位移、加速度、放大和基矩显著增大，且随着峰值地面加速度（PGA）的增加，响应变化明显。时频分析表明，近场运动以中高频脉冲能量输入为特征，而远场激励则提供相对低频、持续时间较长的能量。风荷载通过放大峰值位移对地震反应有贡献，并可能增加机舱疲劳风险。风力机的累积位移受风荷载的影响较大。当涡轮机运行时，风和地震载荷的综合影响会导致比涡轮机关闭时更大的总位移。这些发现强调了在风力涡轮机的抗震设计和机舱疲劳评估中结合地面运动特性和运行风荷载的必要性。来源：复合材料力学仿真Composites FEM