【新文速递】2025年11月12日固体力学SCI期刊最新文章

 

今日更新：International Journal of Solids and Structures 1 篇，Journal of the Mechanics and Physics of Solids 1 篇，Mechanics of Materials 1 篇，International Journal of Plasticity 1 篇，Thin-Walled Structures 13 篇

International Journal of Solids and Structures

Multiscale electro-chemo-mechanical model of high-capacity amorphous silicon anode material in sodium-ion batteries

Amit Bhowmick, Xiang Gao, Wenquan Lu, Jeevanjyoti Chakraborty, Jun Xu

doi:10.1016/j.ijsolstr.2025.113753

钠离子电池高容量非晶硅负极材料的多尺度电化学-力学模型

The growing interest in sodium-ion batteries (SIBs) is fueled by their abundant resources and environmentally friendly nature, with amorphous silicon emerging as a promising anode material for enhancing capacity. However, the key challenge lies in sustaining reversible capacity during cycling. In this work, we developed a multiscale electrochemical model incorporating an amorphous silicon anode to elucidate the performance parameters of SIBs. Additionally, we integrated an electro-chemo-mechanical model at the particle level to capture stress generation—an essential factor in the degradation of high-capacity electrodes. Unlike existing models, our approach accounts for large-deformation chemo-mechanics at the particle scale and includes simulations under varying charge rates to explore multiscale behavior. The results reveal that coupled sodiation significantly prolongs complete cycling times and influences discharge dynamics, indicating that neglecting this coupling leads to an underestimation of actual capacity. Furthermore, we observed pronounced polarization effects at higher charge rates, resulting in heterogeneous stress distributions across the anode. With the identification of critical failure parameters for both active particles and binder materials, offering novel insights for mitigating degradation in high-capacity electrode systems.

钠离子电池由于其丰富的资源和环境友好性而日益受到关注，非晶硅作为一种极有前途的阳极材料，可以提高电池的容量。然而，关键的挑战在于在循环过程中保持可逆容量。在这项工作中，我们建立了一个包含非晶硅阳极的多尺度电化学模型来阐明sib的性能参数。此外，我们在颗粒水平上集成了电化学-力学模型，以捕获应力产生-这是高容量电极降解的重要因素。与现有模型不同，我们的方法考虑了颗粒尺度上的大变形化学力学，并包括在不同电荷率下的模拟，以探索多尺度行为。结果表明，耦合酸化显著延长了完全循环时间，并影响了放电动力学，表明忽略这种耦合会导致对实际容量的低估。此外，我们观察到在高电荷率下明显的极化效应，导致阳极上的应力分布不均匀。随着活性颗粒和粘合剂材料的关键失效参数的识别，为减轻高容量电极系统的降解提供了新的见解。

Journal of the Mechanics and Physics of Solids

Do discrete fine-scale mechanical models with rotational degrees of freedom homogenize into a Cosserat or a Cauchy continuum?

Jan Eliáš, Gianluca Cusatis

doi:10.1016/j.jmps.2025.106422

具有旋转自由度的离散精细尺度力学模型会均匀化为柯西连续体还是柯西连续体？

This article answers the question of whether homogenization of discrete fine-scale mechanical models, such as particle or lattice models, gives rise to an equivalent continuum that is of Cauchy-type or Cosserat-type. The study employs the machinery of asymptotic expansion homogenization to an alyze discrete mechanical models with rotational degrees of freedom commonly used to simulate the mechanical behavior of heterogeneous solids. The proposed derivation has general validity in both stationary (steady-state) and transient conditions (assuming wavelength much larger that particle size) and for arbitrary nonlinear, inelastic fine-scale constitutive equations. The results show that the unit cell problem is always stationary, and the only inertia term appears in the linear momentum balance equation at the coarse scale. Depending on the magnitude of the local bending stiffness, mathematical homogenization rigorously identifies two limiting conditions that correspond to the Cauchy continuum and the Cosserat continuum. A heuristic combination of these two limiting conditions provides very accurate results also in the transition from one limiting case to the other. Finally, the study demonstrates that cases for which the Cosserat character of the homogenized response is significant are associated with non-physically high fine-scale bending stiffness and, as such, are of no interest in practice.

本文回答了离散精细尺度力学模型（如粒子或晶格模型）的均质化是否会产生柯西型或科塞拉特型的等效连续体的问题。本研究采用渐近膨胀均质化机制，分析了通常用于模拟非均质固体力学行为的具有旋转自由度的离散力学模型。所提出的推导在平稳（稳态）和瞬态条件下（假设波长比粒径大得多）以及任意非线性、非弹性的精细尺度本构方程中都具有普遍的有效性。结果表明，单元胞问题总是平稳的，并且在粗尺度下线性动量平衡方程中只出现惯性项。根据局部弯曲刚度的大小，数学均匀化严格地确定了对应于Cauchy连续统和Cosserat连续统的两个极限条件。这两种极限条件的启发式组合在从一种极限情况过渡到另一种极限情况时也提供了非常精确的结果。最后，该研究表明，均匀响应的Cosserat特征显著的情况与非物理上的高精细尺度弯曲刚度有关，因此，在实践中没有兴趣。

Mechanics of Materials

Characterizing Friction Coefficients of Soft Materials via Stick-Slip Data in Static Friction: Mechanis m Ana lysis and Experimental Validation

Huixin Wei, Wei Fang, Shibin Wang, Zhiyong Wang, Zehui Lin, Baopeng Liao

doi:10.1016/j.mechmat.2025.105545

用静摩擦黏滑数据表征软质材料摩擦系数：机理分析与实验验证

Understanding the friction behavior of soft materials critically depends on the precise characterization of the contact interface. The current characterization methods of friction behavior are limited by its predominant reliance on data from the sliding stage, which often neglects the static friction. In this study, a friction model describing the static friction stage of soft materials is proposed, considering contact deformation and stick slip phenomena. A tribometry platform is designed to investigate these interfacial phenomena during soft material friction. The platform integrates an optical visualization setup with high-resolution imaging components and mechanical loading systems, enabling real-time monitoring of contact evolution. An automated image processing algorithm with edge detection is developed to quantitatively extract displacement-dependent contact zone boundaries from the captured image sequences. Full-field displacement mapping within the contact zone is achieved through integration with two-dimensional digital image correlation (2D-DIC) an alysis. The friction coefficient can be further determined by friction model and stick-slip data in static friction. The developed methodology provides new insights into interfacial mechanis ms and a characterization framework for sliding friction of soft material, with the applicability in evaluating grip performance of robotics.

理解软质材料的摩擦行为关键取决于接触界面的精确表征。目前的摩擦行为表征方法主要依赖于滑动阶段的数据，往往忽略了静摩擦。本文提出了一种描述软质材料静摩擦阶段的摩擦模型，考虑了接触变形和粘滑现象。设计了一个摩擦测量平台来研究软质材料摩擦过程中的这些界面现象。该平台集成了光学可视化设置、高分辨率成像组件和机械加载系统，能够实时监测接触演变。提出了一种带有边缘检测的自动图像处理算法，从捕获的图像序列中定量提取与位移相关的接触区边界。通过与二维数字图像相关（2D-DIC）分析相结合，实现了接触区内的全场位移映射。通过静摩擦时的摩擦模型和粘滑数据可以进一步确定摩擦系数。所开发的方法为软质材料滑动摩擦的界面机制和表征框架提供了新的见解，具有评估机器人抓取性能的适用性。

International Journal of Plasticity

A non-isothermal fractional consistency two-surface viscoplasticity model for gas hydrate-bearing sediments

Wei CHENG, Zhen-Yu YIN

doi:10.1016/j.ijplas.2025.104547

含天然气水合物沉积物非等温分数稠度双表面粘塑性模型

Gas hydrate-bearing sediments (GHBS), recognized as an emerging and highly promising unconventional energy resource, exhibit pronounced rate-, temperature-, and pore pressure-dependent mechanical behaviors that have been inadequately addressed or frequently overlooked in existing constitutive modeling frameworks. In this paper, a novel non-isothermal two-surface elasto-viscoplastic model is proposed based on the fractional consistency viscoplasticity and bounding surface theory to capture the key mechanical behaviors of GHBS under varying loading conditions. Specifically, a modified isotach viscosity formulation is first extended to account for hydrate conditions, with the creep coefficient expressed as an exponential function of hydrate saturation. Secondly, a two-surface (loading and yield surfaces) framework is formulated, integrating multifactorial viscoplastic hardening mechanis ms, namely isotropic hardening, progressive hardening, and deviatoric degradation, along with a Caputo-formed non-orthogonal viscoplastic flow rule. Then, employing the consistency condition of the loading surface, an incremental constitutive relation is rigorously formulated to explicitly relate stress, strain, strain rate, temperature, pore pressure, and hydrate saturation. Finally, validation against experimental data demonstrates the model’s excellent capability to simulate mechanical behaviors under complex time-dependent stress paths. This robust, rate-dependent constitutive framework provides a fundamental basis for subsequent advancements aimed at incorporating a broader spectrum of pertinent factors, such as hydrate dissociation, extended temperature ranges, multi-component effects, and particle crushing, etc.

天然气水合物沉积物（GHBS）被认为是一种新兴的、非常有前途的非常规能源资源，它表现出明显的速率、温度和孔隙压力相关的力学行为，这些行为在现有的本构模型框架中没有得到充分的解决，或者经常被忽视。本文基于分数一致性粘塑性和边界面理论，提出了一种新的非等温双面弹粘塑性模型，以捕捉不同加载条件下GHBS的关键力学行为。具体来说，首先将修正的等黏度公式推广到水合物条件，将蠕变系数表示为水合物饱和度的指数函数。其次，建立了两面（加载面和屈服面）框架，整合了各向同性硬化、渐进硬化和偏差退化等多因素粘塑性硬化机制，以及caputo形成的非正交粘塑性流动规律。然后，利用加载面一致性条件，严格建立增量本构关系，明确地将应力、应变、应变率、温度、孔隙压力和水合物饱和度联系起来。最后，对实验数据的验证表明，该模型具有良好的能力，可以模拟复杂的随时间变化的应力路径下的力学行为。这种稳健的、速率相关的本构框架为随后的进展提供了基础，旨在纳入更广泛的相关因素，如水合物解离、延长的温度范围、多组分效应和颗粒破碎等。

Thin-Walled Structures

Efficient inverse finite element method for real-time shape sensing in aerospace plate and shell structures

Xiao Xiao, Shishun Zhang, Yaqin Liu, Ang Gao, Jianping Xuan, Tielin Shi

doi:10.1016/j.tws.2025.114231

航空航天板壳结构实时形状传感的高效逆有限元方法

The inverse finite element method (iFEM) has demonstrated unique advantages in the field of shape sensing for aerospace plate and shell structures. However, existing inverse shell elements face issues with insufficient membrane strain calculation accuracy and reliance on dense sensor arrangements when dealing with complex geometries or loads. This study proposes a strain-s moothed inverse finite element real-time shape sensing method, which integrates a novel four-node quadrilateral strain-s moothed inverse shell element (iSQS) and a s moothing element an alysis (SEA) method. The novel inverse shell element is based on the kinematic framework of the MITC4 shell element theory, and adopts the strain-s moothed element (SSE) method consisting of inter-element and intra-element s moothing to improve the accuracy of membrane strain calculations. Through comparative numerical ana lysis with other inverse elements under different sensor arrangements and quantities, the effectiveness of the method in improving the membrane strain performance is verified, and high-accuracy shape sensing can be achieved with a s mall number of sensors. Additionally, this study also designs an experimental scheme for real-time shape sensing. Ana lysis of real-time shape sensing for a wing-shaped structure shows that the proposed method maintains monitoring errors within 3%, while exhibiting strong anti-interference ability. These results highlight its significant potential for practical applications.

逆有限元法在航空航天板壳结构的形状感知领域显示出独特的优势。然而，现有的反壳单元在处理复杂几何形状或载荷时面临膜应变计算精度不足和依赖密集传感器布置的问题。本文提出了一种应变光滑反有限元实时形状传感方法，该方法将一种新型的四节点四边形应变光滑反壳单元（iSQS）与一种光滑单元分析（SEA）方法相结合。基于MITC4壳单元理论的运动学框架，采用单元间平滑和单元内平滑相结合的应变光滑单元（SSE）方法，提高了膜应变计算的精度。通过与其他逆元在不同传感器布置和数量下的数值对比分析，验证了该方法在提高膜应变性能方面的有效性，并且可以用较少的传感器实现高精度的形状传感。此外，本研究还设计了一种实时形状感知的实验方案。对翼形结构的实时形状传感分析表明，该方法的监测误差控制在3%以内，抗干扰能力强。这些结果突出了其在实际应用中的巨大潜力。

Comparative Ana lysis of Dynamic Progressive Damage and Process Parameter Optimization A nalysis of Drilling BCF/PEEK Considering the Differences in Scale-span Modeling

Yong Liu, Tianyu Wang, Zitao Pan, Weijie Cheng, Jiawei Cheng, Honggen Zhou

doi:10.1016/j.tws.2025.114232

考虑尺度跨度建模差异的BCF/PEEK钻井动态渐进损伤对比分析及工艺参数优化分析

This study focuses on employing dynamic damage behaviors during the drilling of Braided Carbon Fiber-reinforced Poly Ether Ether Ketone (BCF/PEEK), adopting macroscopic and microscopic failure criteria to optimize process parameters. Firstly, four intra-laminar constitutive models of BCF/PEEK were developed, incorporating macroscopic criteria (Hashin, Tsai-Wu, Chang-Chang, etc) and a modified Micro-Mechanics of Failure (MMF) criterion. Inter-layer delamination and drilling temperature were predicted using a bilinear cohesive element model and heat conduction model. Subsequently, a framework integrating the four failure criteria was established via a user-defined VUMAT subroutine in Abaqus/Explicit, enabling the development of a scale-span thermo-mechanical coupled model for drilling T800S/6K BCF/PEEK, and the damage behaviors such as heat conduction, inter-fiber bundle and matrix interlaminar interactions, and inter-layer bonding were also predicted. Finally, numerical simulations and experiments were conducted to validate the model and compare simulation results with different failure criteria by an alyzing thrust force, temperature and damage morphology on a comprehensive testing platform. A response surface methodology was applied to ana lyze correlations between drilling process parameters and hole quality to determine the optimal process. Results show that the adopted Tsai-Wu criterion achieves the highest accuracy and efficiency in predicting thrust force, while MMF is more precise for predicting drilling temperature fields and hole-wall damage. For drilling T800S/6K BCF/PEEK with a twist drill, the minimum drilling temperature occurs at 3000 r/min spindle speed and 40 mm/min feed rate, while lower thrust force and optimal hole quality are achieved at 5000 r/min and 40 mm/min.

本研究重点研究了编织碳纤维增强聚醚醚酮（BCF/PEEK）在钻孔过程中的动态损伤行为，采用宏观和微观破坏准则对工艺参数进行优化。首先，建立了BCF/PEEK的四种层内本构模型，包括宏观准则（Hashin、Tsai-Wu、Chang-Chang等）和改进的微观失效力学（MMF）准则。采用双线性内聚元模型和热传导模型对层间分层和钻孔温度进行了预测。随后，在Abaqus/Explicit中，通过用户自定义的VUMAT子程序建立了整合4种失效准则的框架，建立了T800S/6K BCF/PEEK钻井的尺度-跨热-力学耦合模型，并预测了热传导、纤维束间和基体层间相互作用、层间键合等损伤行为。最后，通过综合试验平台上的推力、温度和损伤形态分析，对模型进行了数值模拟和实验验证，并对不同失效准则下的模拟结果进行了比较。采用响应面法分析钻井工艺参数与井眼质量的相关性，确定最优工艺。结果表明，采用Tsai-Wu准则预测推力的精度和效率最高，而MMF预测钻进温度场和井壁损伤的精度更高。用麻花钻钻T800S/6K BCF/PEEK时，在主轴转速为3000 r/min、进给速度为40 mm/min时，钻削温度最低，在推力为5000 r/min和进给速度为40 mm/min时，钻削力较低，孔质量最佳。

Experimental study on weak-axis eccentric compression behavior of H-shaped steel partially encased bamboo scrimber columns

Ze Xing, Yang Wei, Xuan Dong, Yu Lin, Jinwei Lu, Jiawei Chen

doi:10.1016/j.tws.2025.114233

h型钢部分包壳竹材柱弱轴偏心受压性能试验研究

This paper presents a novel H-shaped steel partially encased bamboo scrimber (PEBS) column, which is fabricated by encasing the bamboo scrimber between the flange and webs of the H-shaped steel. This study investigates the weak-axis eccentric compression behavior of PEBS columns, focusing on scenarios where they are subjected to eccentric compression loads in engineering applications. Twenty-four specimens with varying eccentricities and height-to-diameter ratios were tested under weak-axis eccentric compression. Comprehensive an alyses were conducted on failure modes, load-displacement relationships, longitudinal strain, and the mechanical properties of the specimens. The results indicated that PEBS columns under eccentric compression primarily failed due to flexural buckling, accompanied by steel bending, bamboo cracking, and separation at the steel-bamboo interface. The ultimate load-carrying capacity decreased by a maximum of 71.4% as eccentricity increased from 0 to 0.5, with the peak ultimate bending moment occurring at an eccentricity of 0.25. Moreover, the ultimate load-carrying capacity decreased by 31.1%, and the maximum bending moment decreased by 42.1% as the height-to-diameter ratio increased from 5.5 to 11.5. A reliable prediction model has been developed to estimate ultimate bearing capacities, taking into account the effects of eccentricity and the height-to-diameter ratio.

本文提出了一种新型的h型钢部分包覆竹材柱，将竹材包覆在h型钢翼缘和腹板之间。本研究研究了PEBS柱的弱轴偏心压缩行为，重点研究了其在工程应用中受到偏心压缩载荷的情况。对24个具有不同偏心和高径比的试件进行了弱轴偏心压缩试验。对试件的破坏模式、荷载-位移关系、纵向应变和力学性能进行了综合分析。结果表明：偏心受压作用下PEBS柱的破坏主要是受弯屈曲，并伴有钢弯、竹节开裂和钢竹界面分离；当偏心距从0增加到0.5时，极限弯矩最大下降71.4%，在偏心距为0.25时达到峰值。当高径比从5.5增加到11.5时，极限承载能力下降了31.1%，最大弯矩下降了42.1%。建立了考虑偏心和高径比影响的可靠的极限承载力预测模型。

Ultimate strength characteristics of OSDs with rib cracks under uniaxial compression

Hesham Abdelbaset, Zhiwen Zhu

doi:10.1016/j.tws.2025.114234

单轴压缩下带肋裂OSDs的极限强度特征

Recently, orthotropic steel decks (OSDs) have experienced fatigue cracks at the U-rib butt weld, which can weaken the ability of the deck to resist increasing loads, potentially leading to buckling failure of the deck structure. Therefore, this study aims to investigate the ultimate strength characteristics of OSDs with fatigue cracks at the U-rib butt weld. A series of finite element (FE) models, which cover a wide range of common geometric dimensions in bridge engineering practices, was established and an alyzed. Nonlinear finite element ana lysis (FEA), considering material and geometric nonlinearities, was carried out using the Arc-length method built-in ABAQUS. Various crack lengths and locations were considered to figure out their effects on the ultimate strength reductions and collapse behavior. A regression model based on FEA results was developed to predict the ultimate strength of OSDs with fatigue cracks at the U-rib butt weld. Results indicated that the fatigue cracks at the U-rib butt weld significantly reduced the ultimate strength of OSDs, with a maximum reduction of 76.61%. It is noticed that rib cracks slightly affected the buckling behavior of models governed by deck plate local buckling failure, but significantly influenced those that failed due to the interactive buckling mode. Locating the crack in the longitudinal direction caused a reduction of 16.1% in the ultimate strength in the case of interactive buckling mode failure. The proposed regressive model accurately predicted the ultimate strength of cracked OSDs under consideration with R2 = 0.974, and a mean error close to zero (i.e., 0.26) compared to the FEA results.

近期，正交异性钢桥面板（OSD）在 U 形肋对接焊缝处出现了疲劳裂纹，这会削弱桥面板抵抗不断增加荷载的能力，有可能导致桥面板结构的屈曲破坏。因此，本研究旨在探究 U 形肋对接焊缝处存在疲劳裂纹的正交异性钢桥面板的极限强度特性。建立了涵盖桥梁工程实践中常见几何尺寸的一系列有限元（FE）模型，并进行了分析。采用 ABAQUS 内置的弧长法进行了考虑材料和几何非线性的非线性有限元分析（FEA）。考虑了各种裂纹长度和位置，以确定它们对极限强度降低和破坏行为的影响。基于 FEA 结果建立了回归模型，用于预测 U 形肋对接焊缝处存在疲劳裂纹的正交异性钢桥面板的极限强度。结果表明，U 形肋对接焊缝处的疲劳裂纹显著降低了正交异性钢桥面板的极限强度，最大降低幅度达 76.61%。注意到，肋骨裂缝对由甲板板局部屈曲失效控制的模型的屈曲行为影响较小，但对因交互屈曲模式失效的模型影响显著。在交互屈曲模式失效的情况下，将裂缝置于纵向方向会导致极限强度降低 16.1%。所提出的回归模型准确预测了所考虑的带裂缝的 OSD 的极限强度，R² = 0.974，与有限元分析结果相比，平均误差接近于零（即 0.26）。

Multi-layer annular-stable piezoelectric energy harvester for bi-directional human motion energy harvesting and ECG monitoring

Jingxiong Wang, Bihan Wu, Nan Shao, Xiaoqing Pu, Jiawen Xu, Ruqiang Yan

doi:10.1016/j.tws.2025.114235

用于双向人体运动能量采集和心电监测的多层环稳定压电能量采集器

Harvesting energy from human motion presents an effective approach for enabling self-powered operation of low-power devices. This paper develops a multiple-layer piezoelectric energy harvester (PEH) with an annular stable (AS) two-dimensional potential well. The design involves two orthogonally arranged, double-layered piezoelectric composite cantilever beams coupled via repulsive magnetic forces. Facilitated by a nonlinear coupled internal resonance effect, an annual potential well is created, allowing for high-efficiency operation through annual-shaped inter-well modulation. The system can capture energy in multiple directional excitations from human motions. A mathematical model is derived, and theoretical ana lysis elucidates the operational mechanis m of the AS-PEH. Numerical simulations and experimental studies validate the feasibility of the proposed harvester. The designed AS-PEH features large inter-well motion with s mall amplitude excitations. In particular, the AS-PEH demonstrates a 645 % wider operational bandwidth and a 144 % higher output voltage compared to that of a conventional bistable PEH structure (CB-PEH) under 0.5 g excitation. In addition, the proposed design features highly efficient vibration energy harvesting under two-dimensional excitations. A case study on human motion was carried out with a self-powered sensor for ECG monitoring. This annular stable, multiple-layer dual‑cantilever PEH introduces a novel design paradigm for nonlinear energy harvesters. By leveraging its inter‑well modulation mechanis m, the proposed configuration achieves satisfactory performance in harvesting low‑frequency, low‑intensity, and multidirectional biomechanical energy from human motion.

从人体运动中收集能量为实现低功耗设备的自供电操作提供了有效的方法。本文研制了一种具有环形稳定二维势阱的多层压电能量采集器。该设计涉及两个正交排列的双层压电复合悬臂梁，通过排斥力耦合。在非线性耦合内共振效应的促进下，可以创建一个年度潜在井，通过年度形状的井间调制实现高效作业。该系统可以从人体运动中捕获多向激励的能量。推导了AS-PEH的数学模型，并对其运行机理进行了理论分析。数值模拟和实验研究验证了该收割机的可行性。设计的AS-PEH具有井间运动大、振幅小的特点。特别是，在0.5 g激励下，AS-PEH比传统的双稳态PEH结构（CB-PEH）的工作带宽宽645%，输出电压高144%。此外，该设计在二维激励下具有高效的振动能量收集功能。以自供电式心电传感器为例，对人体运动进行了研究。这种环空稳定的多层双悬臂式PEH为非线性能量收集器引入了一种新的设计范式。通过利用其井间调制机制，所提出的配置在从人体运动中收集低频、低强度和多向生物力学能量方面取得了令人满意的性能。

Numerical and experimental investigation of dual-wrinkled morphology on damage characteristics in composite laminates under multidirectional static loading

Lu Jin, Yong Chen, Jiguo Zhang, Yukun Zhang, Xuyang Li

doi:10.1016/j.tws.2025.114237

多向静载荷作用下复合材料层合板双皱形态损伤特性的数值与实验研究

Wrinkle defects readily arise during the manufacturing of composite structures and often appear as coupled multi-wrinkle morphologies, which poses challenges for failure prediction of laminates. Such defects create non-uniform geometric fields within the structure, altering local stress states and significantly affecting damage evolution. This study systematically examines the damage response of three representative dual-wrinkle morphologies (stack-based, convex-based, concave-based) under multidirectional static loading combinations (tension, bending, and tension-bending). A morphology taxonomy grounded in production statistics is established, and a Python-Abaqus routine is developed to generate specimen geometries with prescribed wrinkle amplitude and angle; intralaminar damage and interlaminar damage are predicted using composite failure criteria. Representative specimens are experimentally validated under tensile loading. The results reveal marked differences among the three dual-wrinkle morphologies in both intralaminar and interlaminar damage levels, with clear sensitivity to wrinkle amplitude and angle. This study develops an evaluation framework that integrates multi-wrinkle morphology classification, parametric geometry generation, and damage metrics, providing a basis for defect assess ment in composite manufacturing.

在复合材料结构的制造过程中，易出现褶皱缺陷，且常以多褶皱耦合形态出现，这对层合板的失效预测提出了挑战。这些缺陷会在结构内部产生不均匀的几何场，改变局部应力状态，显著影响损伤演化。本研究系统地研究了三种具有代表性的双皱形态（基于堆叠的、基于凸的、基于凹的）在多向静态载荷组合（拉伸、弯曲和拉伸-弯曲）下的损伤响应。建立了基于生产统计的形态分类，并开发了Python-Abaqus程序来生成具有规定皱纹幅度和角度的标本几何形状；采用复合失效准则对层间损伤和层内损伤进行了预测。有代表性的试件在拉伸载荷下进行了实验验证。结果表明，三种双皱形态在层内和层间损伤水平上存在显著差异，对皱幅值和角度有明显的敏感性。本研究开发了一种集成多褶皱形态分类、参数几何生成和损伤度量的评估框架，为复合材料制造中的缺陷评估提供了基础。

Topological interface state formation mechanis m of zero Poisson’s ratio metamaterial and its application in vibration reduction

Jiale Xu, Duo Zhu, Zhenkun Guo, Xinming Li, Ying Liu, Meng Li, Guoqing Jiang

doi:10.1016/j.tws.2025.114240

零泊松比超材料拓扑界面态形成机理及其在减振中的应用

To investigate the topological interface states and potential applications of periodic structures with zero Poisson’s ratio (ZPR), a topological metamaterial exhibiting ZPR characteristic is proposed in this study. By applying Bloch’s theorem combined with the spectral element method (SEM) and finite element method (FEM), the band structure and vibration trans mittance of the ZPR metamaterial are calculated. The mechanis m of band folding is an alyzed, and extra band gaps are generated by opening degenerate Dirac points through spatial symmetry breaking. Through an alysis of vibrational modes and band inversion mechanis ms, this study elucidates the formation dynamics mechanis m governing topological interface states in ZPR metamaterial, while providing theoretical validation of the realizability. Compression and vibration experiments are subsequently performed to verify the ZPR and band gap characteristics of the structure. Application-oriented explorations are carried out from the perspectives of energy transfer and vibration suppression. This study not only provides an approach for manipulating elastic waves in ZPR metamaterials, but also lays a novel theoretical framework for the topological design of multifunctional vibration reduction structures in practical engineering applications.

为了研究零泊松比（ZPR）周期结构的拓扑界面态及其潜在应用，本文提出了一种具有零泊松比特性的拓扑超材料。应用Bloch定理，结合谱元法（SEM）和有限元法（FEM）计算了ZPR超材料的能带结构和振动透过率。分析了带折叠的机理，通过空间对称破缺打开简并狄拉克点产生额外的带隙。本研究通过对ZPR超材料的振动模式和能带反转机制的分析，阐明了ZPR超材料拓扑界面态的形成动力学机制，同时为其可实现性提供了理论验证。随后进行了压缩和振动实验，验证了该结构的ZPR和带隙特性。从能量传递和振动抑制的角度进行了面向应用的探索。该研究不仅为ZPR超材料的弹性波操纵提供了一种方法，而且为实际工程应用中多功能减振结构的拓扑设计奠定了新的理论框架。

An improved Bayesian regularization approach with Cholesky decomposition and γ-adaptive control for multi-source/continuous impact load identification

Huagang Lin, Hui Feng, Jiabo Wang, Dangxiong Wang, Yunju Yan

doi:10.1016/j.tws.2025.114241

一种基于乔列斯基分解和γ自适应控制的改进贝叶斯正则化方法在多源/连续冲击载荷识别中的应用

Accurate load identification is the key process for health detection and invisible internal damages of aerospace composite structure. Aiming at the ill-posedness of time-dependent inverse problem, an improved Bayesian regularization algorithm with Cholesky decomposition and γ-adaptive control for multi-source/continuous load identification is proposed. Firstly, the dynamic governing equations of aerospace panel structure under the non-classical boundaries with multiple source inputs are established, where the mode functions of Galerkin approach are set up through admissible functions constructed by employing Gram–Schmidt process. Then, the discrete state-space model with multiple measurement sensors is established, the obtained response data is processed by wavelet threshold and an improved Bayesian regularization approach is developed to solve the ill-posedness problem in the aspects of multi-source/continuous impact load identification. A few numerical examples considering regularization parameters, boundary condition and multi-source/continuous load types are an alysed to demonstrate the accuracy and efficiency of the present method. The experiments including bolted stiffened panels test and bombardment test are presented to carry out the load identification. The peak error of bolted stiffened panels does not exceed 9.71%, and the maximum peak error of bombardment test does not exceed 11.8% and minimum error only 0.2%, demonstrating the effectiveness of this approach in multi-source/continuous impact load identification.

精确的载荷识别是航空航天复合材料结构健康检测和隐性内部损伤检测的关键过程。针对时变反问题的不适定性，提出了一种基于 Cholesky 分解和γ自适应控制的改进贝叶斯正则化算法，用于多源/连续载荷识别。首先，建立了具有非经典边界和多源输入的航空航天面板结构的动力学控制方程，其中通过采用 Gram-Schmidt 过程构造的可接受函数建立了伽辽金方法的模态函数。然后，建立了具有多个测量传感器的离散状态空间模型，对获得的响应数据进行小波阈值处理，并开发了一种改进的贝叶斯正则化方法来解决多源/连续冲击载荷识别中的不适定性问题。通过考虑正则化参数、边界条件和多源/连续载荷类型的一系列数值示例，证明了该方法的准确性和效率。文中介绍了包括螺栓加强板试验和冲击试验在内的实验，以进行载荷识别。螺栓加强板试验的峰值误差不超过 9.71%，冲击试验的最大峰值误差不超过 11.8%，最小误差仅为 0.2%，这表明该方法在多源/连续冲击载荷识别方面是有效的。

Deployment process and size optimization of the inflatable plug for sealing a large section tunnel fire

Xinhui Sun, Yingying Zhang, Peijian Chen, Junhao Xu, Yushuai Zhao, Yi Zhou

doi:10.1016/j.tws.2025.114242

大断面隧道火灾密封膨胀塞的部署工艺及尺寸优化

Compared with traditional sandbag and roller shutter door, the inflatable plug is expected to be an economical, fast and effective tunnel sealing method. When the inflatable plug is used to seal the large section highway tunnel fire, the complex tunnel boundary affects the sealing capacity and stress evolution of the inflatable plug after deployment. It is also necessary to establish the relationship between the plug dimensions and the sealing effectiveness. This paper a nalyses the whole process of deflation, folding, installation and deployment of the inflatable plug in the large section tunnel through numerical simulation. The stress evolution of the inflatable plug was clarified. The sealing capacity of the inflatable plug was investigated using contact area and leakage area as indicators, and the relationship between the tunnel sealing ratio and the inflatable plug size was determined. The research results show that there is a stress concentration area in the inflatable plug after deployment, and the maximum stress decreases with the increase of the internal pressure in the inflatable plug. The sizes of the inflatable plug, especially the radius, have a significant effect on the sealing capacity. The leakage area of the inflatable plug showed an exponentially decreasing negative relationship with the inflation volume. Additionally, compared with installed in the tunnel top, installing the inflatable plug on the tunnel side can improve the sealing capacity, but will increase the probability of inflatable plug failure. This work can be references for the design of the inflatable plug to seal tunnel disasters.

与传统的沙袋和卷帘门相比，充气塞有望成为一种经济、快速、有效的隧道密封方法。在采用膨胀塞封堵大断面公路隧道火灾时，复杂的隧道边界会影响膨胀塞展开后的密封能力和应力演化。还需要建立堵头尺寸与密封效果之间的关系。通过数值模拟分析了大断面隧道中膨胀塞的放气、折叠、安装、展开全过程。澄清了膨胀桥塞的应力演化过程。以接触面积和泄漏面积为指标考察了膨胀塞的密封能力，确定了膨胀塞尺寸与隧道密封比的关系。研究结果表明：膨胀桥塞下入后存在应力集中区，最大应力随膨胀桥塞内压的增大而减小；膨胀桥塞的尺寸，尤其是半径对密封能力有显著影响。膨胀塞的泄漏面积与膨胀体积呈指数递减的负相关关系。此外，与安装在隧道顶部相比，安装在隧道侧面可以提高膨胀塞的密封能力，但会增加膨胀塞失效的概率。本文的工作可为膨胀塞封堵隧道灾害的设计提供参考。

Bending fatigue behavior and microstructure on the T-shaped ferritic stainless steel joints brazed with Ni-Cr-Si-P filler metal

Gyoko Oh, Atsushi Umezawa

doi:10.1016/j.tws.2025.114243

Ni-Cr-Si-P钎料钎焊t型铁素体不锈钢接头的弯曲疲劳行为及显微组织

The fatigue strength of brazed joints is strongly influenced by material structure, geometrical shape, and loading mode. In this study, we performed tests and numerical stress ana lysis on the fatigue strength and fracture behavior of T-shaped Ni alloy brazed joints of thin ferritic stainless steels with different plate thicknesses and the relationship with metallographic structure and stress concentration. It was revealed that the Ni-Cr-Si-P brazing filler metal has excellent gap-filling properties, promotes bonding by interfacial melting reaction with ferritic stainless steel, and forms a s mooth fillet at the joint, where the ratio of the fillet curvature radius to the plate thickness affects the stress concentration factor and fatigue limit. The surface of the brazing alloy layer was enriched in P and Cr, and a Ni-Cr-Fe-Si-P solidification structure with lamellar eutectic was formed, where both intergranular and transgranular cracks near the crack initiation site were observed. The slope constant of the S–N curve of the brazed joint was s maller than that of the s mooth material plate. When comparing peak stress amplitudes, the fatigue limit values of the brazed joints were the same regardless of the plate thickness based on the probabilistic a nalysis. A novel model was proposed to predict the fatigue limit of brazed joints by taking into account the impact of both the metallographic structure and the geometry of the fracture initiation point.

钎焊接头的疲劳强度受材料结构、几何形状和加载方式的影响较大。本研究对不同板厚铁素体不锈钢t型Ni合金钎焊接头的疲劳强度和断裂行为以及与金相组织和应力集中的关系进行了试验和数值应力分析。结果表明：Ni-Cr-Si-P钎料具有良好的补隙性能，能促进与铁素体不锈钢的界面熔化反应，在接头处形成光滑的圆角，圆角曲率半径与焊板厚度之比影响应力集中系数和疲劳极限。钎焊合金层表面富集了P和Cr，形成了Ni-Cr-Fe-Si-P的片层共晶凝固组织，裂纹起裂部位附近出现了沿晶和穿晶裂纹。钎焊接头S-N曲线的斜率常数小于光滑材料板的斜率常数。对比峰值应力幅值时，根据概率分析，无论板材厚度如何，钎焊接头的疲劳极限值都是相同的。提出了一种同时考虑金相组织和起裂点几何形状影响的钎焊接头疲劳极限预测模型。

Ana lyses of CFRP-to-steel Joints with a Hybrid Debonding Failure Mode

Yongming Yang, Jun Zhao, Ata Khabaz-Aghdam, Shishun Zhang, Hugo Biscaia

doi:10.1016/j.tws.2025.114244

具有复合脱粘破坏模式的cfrp -钢节点分析

Hybrid debonding is a common failure mode of bonded joints within the Carbon Fibre Reinforced Polymers (CFRP) strengthened steel structures when mechanically loaded, but the bond response is still unclear and requires further studies to guide engineering applications. In this paper, a hybrid debonding mode combining cohesive debonding and CFRP delamination, with different relative proportions of each, was obtained by applying a monotonic load to CFRP-to-steel double-strap bonded joints. The effect of the ratio between the cohesive debonding length (Lc) with the CFRP bonded length (Lb) (i.e., (Lc/Lb)∗100%) on the bond response was studied. It was found that for the bonded joints with a debonding mode with a higher (Lc/Lb)∗100%, a longer CFRP strain distribution plateau can be measured before failure, and a more complete load vs. slip curve and local bond vs. slip curve can be determined. In these cases, with a higher (Lc/Lb)∗100%, the bond stress gradually extended farther away from the CFRP-loaded end and even to the free end of the bonded joints, indicating that the CFRP debonding propagation was more efficient during the monotonic loading. For the bonded joints with the debonding mode where (Lc/Lb)∗100% was near zero, the load vs. slip curve had only a linear ascending stage, indicating an absolute brittle failure, which should be avoided. It is suggested that the allowable value of (Lc/Lb)∗100% in real applications can be determined based on the linear relationship between the degree of ductility represented by the load vs. slip plateau length and (Lc/Lb)∗100%. A numerical model of CFRP-to-steel joints considering the hybrid debonding mode was constructed using the commercial software ABAQUS. The full-range bond response of the CFRP-to-steel joints with the hybrid debonding mode, not obtained from the experimental measurements, was an alysed and discussed thoroughly.

在碳纤维增强聚合物（CFRP）加固的钢结构中，当受到机械载荷时，混合脱粘是粘结接头的一种常见失效模式，但其粘结响应仍不清楚，需要进一步研究以指导工程应用。本文通过在 CFRP 至钢的双带粘结接头施加单调载荷，获得了结合内聚脱粘和 CFRP 分层的不同相对比例的混合脱粘模式。研究了内聚脱粘长度（Lc）与 CFRP 粘结长度（Lb）之比（即（Lc/Lb）×100%）对粘结响应的影响。结果表明，对于脱粘模式中（Lc/Lb）×100%较高的粘结接头，在破坏前可以测量到更长的 CFRP 应变分布平台，并且可以确定更完整的载荷-滑移曲线和局部粘结-滑移曲线。在这些情况下，（Lc/Lb）×100%较高时，粘结应力逐渐远离 CFRP 受载端，并甚至延伸至粘结接头的自由端，表明在单调加载过程中 CFRP 脱粘传播更有效。对于脱粘模式下（Lc/Lb）×100% 接近零的粘结接头，荷载与滑移曲线仅有一个线性上升阶段，表明其为绝对脆性破坏，应予以避免。建议在实际应用中，（Lc/Lb）×100% 的允许值可根据由荷载与滑移平台长度所代表的延性程度与（Lc/Lb）×100% 之间的线性关系来确定。利用商业软件 ABAQUS 构建了考虑混合脱粘模式的碳纤维增强复合材料（CFRP）与钢粘结接头的数值模型。对未通过实验测量获得的具有混合脱粘模式的 CFRP 与钢粘结接头的全范围粘结响应进行了全面分析和讨论。

An an alytical model for the mechanical properties of semi-circular expansion bellows

Baolong Shi, Zhong Luo, Lei Li, Linhong Song, Zidong Wang, Qiu Li

doi:10.1016/j.tws.2025.114246

半圆膨胀波纹管力学性能的解析模型

The distinctive corrugated morphology of bellows imparts exceptional mechanical compliance, with stress-strain characteristics serving as fundamental determinants of their displacement compensation and structural continuity performance. This study focuses on the semi-circular bellows, establishing an efficient ana lytical model initially to accurately predict various mechanical parameters of which subjected to axial loads. The an alytical model was double validated from two perspectives, which include FEA and experimental testing. Among them, a comprehensive comparison was made between the mechanical parameter results obtained from the FEA and the an alytical model, while the FEA-derived Von-Mises stress distributions showed excellent alignment with established theoretical expectations from prior studies. Finally, the study systematically investigated the influence of the critical geometric parameter μ on the mechanical response characteristics of bellows. Single-convolution a nalysis revealed that the variation curves of the mechanical parameters with respect to the meridional angle of established ana lytical model, exhibited good consistency with the curves from FEA and testing, conclusively verifying the model's accuracy and reliability. The parametric comparative study indicates that the variable μ exerts a primary influence on the Lame coefficients and consequently induces alterations in the angular strains, which result in complex and diverse variations of mechanical behavior at the boundaries, crest-trough transition points, and ±0.5π rad positions. Research contents present the insights necessary for the mechanical characteristics of bellows under axial loads.

波纹管独特的波纹形态赋予了特殊的机械顺应性，应力-应变特性是其位移补偿和结构连续性性能的基本决定因素。本文以半圆形波纹管为研究对象，初步建立了高效的分析模型，能够准确预测其在轴向载荷作用下的各种力学参数。从有限元分析和实验测试两个角度对分析模型进行了双重验证。其中，有限元计算得到的力学参数与解析模型得到的力学参数进行了全面比较，得到的Von-Mises应力分布与前人研究建立的理论期望非常吻合。最后，系统地研究了关键几何参数μ对波纹管力学响应特性的影响。单卷积分析表明，所建立的解析模型的力学参数随子午角的变化曲线与有限元分析和试验曲线具有较好的一致性，最终验证了模型的准确性和可靠性。参数对比研究表明，变量μ对Lame系数产生主要影响，从而引起角应变的变化，从而导致边界、波峰谷过渡点和±0.5π rad位置的力学行为发生复杂而多样的变化。研究内容提出了对轴向载荷下波纹管力学特性的必要见解。

Experimental study on cyclic loading behavior of web-connected buckling-restrained beam-column joints

Chao Dou, Hui-fang Ding, Xiang-xu Teng, Jie Zhang, Jin-guang Yu

doi:10.1016/j.tws.2025.114248

腹板连接约束屈曲梁柱节点循环荷载性能试验研究

Based on the concepts of damage control, buckling restraint and rapid post-earthquake repair, this paper proposes a novel Web-Connected Buckling-Restrained Beam-Column Joint (WC-BR-BCJ). In the joint, splicing beams are connected via an energy-dissipation component (EDC) and a web shear connector. The web shear connector, together with the beam flange, provides restraint to prevent buckling of the reduced-section buckling-restrained plates (BRPs) in the EDC. The joint achieves decoupling between the connection components and the floor slab system, eliminating the interference of the slab to the post-earthquake repair. Quasi-static cyclic loading tests were conducted for three joint specimens to reveal the working mechanis m and hysteretic performance of the WC-BR-BCJ, accompanied by finite element modelling and simulations. The study indicated that, the WC-BR-BCJ exhibited the anticipated working mechanis m, where the upper and lower BRP s can be effectively constrained and achieves full yielding under both tension and compression, while the main components remain elastic. When the constraint clearance between the BRP and the restrainers is proper, the BRP develops a multi-stage deformation mode, with high bearing capacity and excellent energy-dissipating capability. In contrast, overlarge constraint clearance results in significant flexural buckling deformation of the BRP, leading to a significant decline in the stiffness, bearing capacity, and energy dissipation capability. The finite element modelling and an alyses agreed well with the test results, and reasonably reflected the cyclic loading behavior. In addition, the joint is not sensitive to initial geometric defects, which reduces the manufacturing difficulty. Generally, the new WC-BR-BCJ features a simple construction and clear working mechanis m, as well as superior seis mic performance.

基于损伤控制、屈曲约束和震后快速修复的概念，提出了一种新型的腹板连接屈曲约束梁柱节点（WC-BR-BCJ）。在节点中，拼接梁通过耗能构件（EDC）和腹板剪切接头连接。腹板剪切接头与梁翼缘一起提供约束，以防止EDC中减截面抗屈曲板（brp）的屈曲。该节点实现了连接构件与楼板体系的解耦，消除了楼板对震后修复的干扰。为揭示WC-BR-BCJ的工作机理和滞回性能，对3个节理试件进行了准静态循环加载试验，并进行了有限元建模和仿真。研究表明，WC-BR-BCJ表现出了预期的工作机制，即上下BRP在拉压双重作用下均能得到有效约束，实现完全屈服，而主要构件仍保持弹性。当BRP与约束间隙适当时，BRP发展为多阶段变形模式，具有较高的承载能力和良好的耗能能力。约束间隙过大则会导致BRP发生明显的屈曲变形，导致其刚度、承载能力和耗能能力显著下降。有限元建模和分析与试验结果吻合较好，合理地反映了循环加载特性。此外，该接头对初始几何缺陷不敏感，降低了制造难度。总体而言，新型WC-BR-BCJ结构简单，工作机制清晰，抗震性能优越。