【新文速递】2026年1月7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 8 篇

International Journal of Solids and Structures

Oxygen-mediated inhibition of gaseous hydrogen embrittlement in pipeline steels: Sub-size specimen testing and coupled diffusion-damage modeling

P. Fernández-Pisón, L.M. Santana, Q. Sellam, V. Farrugia, Y. Madi, J. Besson

doi:10.1016/j.ijsolstr.2026.113832

管道钢中氧介导的气体氢脆抑制：亚尺寸试样测试和耦合扩散损伤模型

Hydrogen embrittlement (HE) poses a major challenge for safe hydrogen transport, particularly in repurposed natural gas pipelines. Trace oxygen additions can mitigate HE, yet their effectiveness remains insufficiently understood. This study examines the influence of 50-500 vppm oxygen in gaseous HE on a modern E355 mod. steel using sub-size tensile specimens. Tests were performed at 100 and 200 bar, with strain rates of 1 × 1 0 − 5 and 5 × 1 0 − 4 s−1. In pure hydrogen, the reduction of area decreased from 80% in air to 55% (100 bar, fast rate), 45% (200 bar, fast rate), and 40% (100 bar, slow rate), indicating severe embrittlement. Oxygen additions progressively recovered ductility, with inhibition effectiveness rising from 35-50% (50 vppm and 100 bar) to 80% (500 vppm and 200 bar). Fractography revealed reduced hydrogen-induced surface cracking and enhanced ductile features with increasing oxygen content. Finite-element simulations employed a modified nonlocal GTN model coupled with hydrogen diffusion, extended here with an ad hoc diffusion boundary condition to represent oxygen-induced inhibition. To our knowledge, this is the first FE framework to explicitly account for environmental inhibition effects. The model successfully reproduced key experimental trends, including oxygen-mediated ductility recovery, strain-rate-sensitive stress drops, and the transition from surface- to internally-initiated damage. This integrated experimental-modeling approach provides a mechanistic basis for interpreting oxygen-mediated inhibition, quantifies the beneficial effect of trace oxygen, and establishes a foundation for predictive assess ments of hydrogen uptake and damage evolution in steels under potential pipeline inhibition conditions.

氢脆（HE）是氢安全运输的主要挑战，特别是在重新利用的天然气管道中。添加微量氧可以减轻HE，但其有效性仍未充分了解。本研究采用亚尺寸拉伸试样，考察了气态HE中50-500 vppm氧对现代E355型钢的影响。试验在100和200 bar下进行，应变率为1 × 10−5和5 × 10−4 s−1。在纯氢中，空气中的面积收缩率从80%下降到55% （100 bar，快速率），45% （200 bar，快速率）和40% （100 bar，慢速率），表明脆化严重。氧的加入逐渐恢复了延性，抑制效果从35-50% （50 vppm和100 bar）上升到80% （500 vppm和200 bar）。断口形貌显示，随着氧含量的增加，氢致表面裂纹减少，延展性增强。有限元模拟采用了一个改进的非局部GTN模型，该模型与氢扩散相结合，在这里扩展了一个特殊的扩散边界条件，以表示氧诱导的抑制作用。据我们所知，这是第一个明确解释环境抑制效应的FE框架。该模型成功再现了关键的实验趋势，包括氧介导的延性恢复、应变速率敏感的应力下降以及从表面到内部损伤的转变。这种综合实验建模方法为解释氧介导的抑制作用提供了机制基础，量化了微量氧的有益作用，并为潜在管道抑制条件下钢的氢吸收和损伤演变的预测评估奠定了基础。

Journal of the Mechanics and Physics of Solids

High Strain Rate Behavior of Liquid Crystal Elastomers

Adeline Wihardja, Juan Carlos Nieto-Fuentes, Daniel Rittel, Kaushik Bhattacharya

doi:10.1016/j.jmps.2026.106501

液晶弹性体的高应变率行为

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−1 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 spectrum of examined behavior.

液晶弹性体是一种将液晶有序性和形变耦合在一起的橡胶状固体。这种耦合带来了许多在软机器人和能量吸收等应用领域颇具吸引力的特性。本文的研究动机在于后者，对一类特定的液晶弹性体——各向同性起源多畴液晶弹性体——在拉伸和压缩的宽应变率范围内进行了系统的实验研究。这项研究的一个重要方面是开发了一种新型拉伸落塔装置，能够实现 100 s−1 的拉伸应变率，这对于实际应用十分重要，但此前难以实现。本文还对最近提出的本构模型进行了扩展，使其适用于高应变率范围，并表明该模型能够很好地拟合所观察到的行为，涵盖整个研究行为范围。

Mechanics of Materials

Brittle failure in residually stressed soft materials — Modelling, initiation and propagation of failure, and experimental simulations

Soumya Mukherjee, Paritosh Mahata, Saksham Raj

doi:10.1016/j.mechmat.2026.105598

残余应力软材料的脆性破坏。破坏的模型、开始和扩展以及实验模拟

This paper presents a framework to model semi-brittle (gradual) to fully brittle catastrophic failure of residually stressed soft materials. We consider a virtual stress-free configuration that follows the Volokh failure model, where Neo-Hookean or Yeoh models are embedded in the incomplete Gamma function. Using inverse an alysis, two failure models are developed accurately for residually stressed bodies. The first developed model is used to investigate the initiation and propagation of failure in a residually stressed hollow thick sphere subjected to internal pressure — a problem equivalent to cavitation instability and void growth. In the presence of residual stress, a cavity need not necessarily grow outward starting from the inner surface Instead, the initiation and propagation of failure show intricate patterns, mechanis ms, and staging, influenced by different types of residual stress fields. Failure can initiate at the outer surface, at an intermediate point, or simultaneously at multiple locations and propagate both inward and outward. Among several other cases, compound spheres (a specific type of residually stressed spheres) exhibit an intriguing pattern and a clear staging in failure propagation. The residually stressed Yeoh model with Volokh failure is used to simulate the failure of initially stressed natural rubber under biaxial extension, based on experimental results on the failure of natural rubber. Diverse shapes of the failure envelope demonstrate the initial stress-driven anisotropic response of natural rubber. The current constitutive framework applies to predicting the failure of any other residually stressed soft structures. This model is further simplified to create a residually stressed Yeoh model that can be useful for various applications.

本文提出了一个框架来模拟残余应力软材料的半脆性（逐渐）到完全脆性突变破坏。我们考虑遵循Volokh失效模型的虚拟无应力配置，其中Neo-Hookean或Yeoh模型嵌入在不完全Gamma函数中。利用逆分析方法，准确地建立了残余受力体的两种破坏模型。第一个建立的模型用于研究内压作用下残余应力空心厚球破坏的开始和扩展，这是一个相当于空化不稳定和空洞生长的问题。在残余应力存在的情况下，空腔不一定从内表面开始向外生长，相反，受不同类型残余应力场的影响，破坏的发生和扩展表现出复杂的模式、机制和阶段。破坏可以在外表面、中间点或同时在多个位置开始，并向内和向外传播。在其他几种情况中，复合球（一种特殊类型的残余应力球）在破坏传播中表现出一种有趣的模式和明确的阶段。基于天然橡胶破坏的实验结果，采用残余应力Yeoh模型和Volokh破坏模型，模拟了初始应力天然橡胶在双轴拉伸下的破坏。不同形状的破坏包络表明天然橡胶的初始应力驱动的各向异性响应。目前的本构框架适用于预测任何其他残余应力软结构的破坏。该模型进一步简化，以创建可用于各种应用程序的残余压力杨氏模型。

International Journal of Plasticity

Strong, ductile, and hierarchical multiscale heterostructured magnesium alloy via coarse-grained twins coupled with fine-grained precipitates

Shuaishuai Liu, Liuyong He, Tianjiao Li, Liping Zhong, Mingshuai Huo, Yongjian Wang, Wenzhen Xia, Wenhuan Chen, Wenbin Zhang, Qiyang He, Manoj Gupta, Guangsheng Huang, Bin Jiang, Fusheng Pan

doi:10.1016/j.ijplas.2026.104608

通过粗晶孪晶与细晶析出相结合而形成的强、延展性和分层多尺度异质镁合金

Heterostructured materials provide a promising path to address the strength-ductility trade-off in Mg alloys. However, designs relying solely on grain size heterogeneity often yield limited improvements. Herein, we fabricated multiscale heterostructures in an AZ91 alloy, featuring twin-modified coarse grains and precipitate-hardened fine grains, through a combination of pre-aging, extrusion, and pre-compression treatments. The obtained material exhibits an exceptional strength-ductility combination, outperforming most existing AZ91 alloys. Mechanistic investigations reveal that this favorable combination is primarily driven by enhanced hetero-deformation induced (HDI) strengthening and hardening, which result from the accumulation of geometrically necessary dislocations (GNDs) at multiscale interfaces. Additional contributions arise from twin-matrix interactions that activate non-basal slip systems, as well as a composite strengthening effects induced by precipitates, dislocation cells, and stacking faults. The multiscale heterostructures promote uniform deformation through slip transfer, stress redistribution, and strain delocalization. Strain hardening is initially dominated by HDI effects, while traditional dislocation-mediated mechanis ms become predominant at larger strain. The present approach, integrating precipitate engineering, grain size control, and crystallographic design, provides general guidelines for developing advanced lightweight materials.

异质结构材料为解决镁合金的强度-延性平衡问题提供了一条很有前途的途径。然而，仅仅依靠晶粒尺寸非均质性的设计通常只能产生有限的改进。本研究通过预时效、挤压和预压缩相结合的方法，在AZ91合金中制备了双晶改性粗晶和析出硬化细晶的多尺度异质组织。获得的材料表现出优异的强度-延展性组合，优于大多数现有的AZ91合金。力学研究表明，这种良好的组合主要是由多尺度界面上几何必要位错（GNDs）的积累所导致的异质变形诱导（HDI）强化和硬化的增强所驱动的。额外的贡献来自于激活非基底滑移系统的双基质相互作用，以及由沉淀、位错细胞和层错引起的复合强化效应。多尺度异质结构通过滑移传递、应力重分布和应变离域促进均匀变形。应变硬化最初以HDI效应为主，而传统的位错介导机制在大应变下起主导作用。目前的方法，集成了沉淀工程，粒度控制和晶体学设计，为开发先进的轻量化材料提供了一般指导方针。

Thin-Walled Structures

Seis mic Performance Research of H-Section Steel Grouted Connection in Modular Steel Buildings

Yu Zhang, Shuangshuang Jin, Yi Yan, Jiulin Bai

doi:10.1016/j.tws.2025.114474

组合式钢结构h型钢灌浆连接抗震性能研究

Modular steel buildings have rapidly developed owing to their advantages in fast construction and environmental sustainability. The performance and configuration of inter-module connections are critical to structural safety and construction efficiency. To address the limitations of existing connections in terms of coordinated optimization of construction efficiency, decoration protection, and rotational stiffness, a novel grouted connection utilizing H-section steel as the connector was proposed. In order to evaluate its seis mic performance, quasi-static tests were carried out on four specimens. The hysteretic behavior, load-bearing capacity, energy dissipation, and ductility were investigated under axial compression ratios of 0.2 and 0.4. Furthermore, refined finite element models were developed to investigate the effects of the axial compression ratio and the connector cross-sectional dimensions on the connection’s mechanical behavior. The a nalysis results demonstrated that the proposed connection exhibited excellent load-bearing capacity and energy dissipation performance. Based on the experimental observations and numerical an alyses, the load-transfer mechanis m of the proposed connection was clarified, and a theoretical model for initial rotational stiffness incorporating the axial compression ratio and connector dimensions was established, with calculated values deviating by less than 10%, thereby providing a reliable design reference for engineering applications.

钢结构模块化建筑以其施工速度快、环境可持续性强等优点迅速发展起来。模块间连接的性能和配置对结构安全和施工效率至关重要。为了解决现有连接在协调优化施工效率、装饰保护和旋转刚度方面的局限性，提出了一种利用h型钢作为连接器的新型灌浆连接。为评价其抗震性能，对4个试件进行了拟静力试验。研究了轴压比为0.2和0.4时的滞回性能、承载能力、能量耗散和延性。此外，还建立了精细化的有限元模型，研究了轴压比和连接器截面尺寸对连接力学行为的影响。分析结果表明，该连接具有良好的承载和耗能性能。在实验观察和数值分析的基础上，阐明了该连接的载荷传递机理，建立了考虑轴压比和连接尺寸的初始转动刚度理论模型，计算值偏差小于10%，为工程应用提供了可靠的设计参考。

High-performance shape memory alloy U-shaped devices under tension–compression loading for seis mic resilient design

Bin Wang, Tianhao Yu, Peng Chen

doi:10.1016/j.tws.2026.114482

高性能形状记忆合金u型装置在拉压载荷下的抗震弹性设计

Excessive seis mic damage and residual deformation in structures can lead to time-consuming post-earthquake repairs or even complete demolition, which negatively impacts the recovery of functionality and causes significant socio-economic losses. This dilemma highlights the urgent need to shift the current seis mic design philosophy from a life safety-focused approach to a seis mic resilience-oriented design strategy. In recent years, shape memory alloys (S MAs), as high-performance metallic materials, have obtained increasing attention due to their remarkable self-centering (SC) and energy dissipation capabilities. Superelastic S MA U-shaped dampers (S MA-UDs) utilize the bending properties of plates, expanding the application scenarios of S MAs in earthquake engineering. For this reason, the potential application of S MA-UDs as shear keys in highway bridges is proposed in this study. An experimental study was carried out on S MA-UDs under cyclic tension–compression loading. The performance of the S MA-UDs was evaluated using various loading protocols. Test results demonstrate excellent and stable flag-shaped hysteresis loops under different loading conditions, which are very suitable for sei mic resilient design during strong earthquakes. Additionally, detailed three-dimensional finite element an alyses were conducted to further investigate the deformation mechanis ms of the S MA-UDs. Finally, an an alytical model was developed for implementing S MA-UDs in seis mic applications.

过度的地震破坏和结构的残余变形可能导致耗时的震后修复甚至完全拆除，这对功能的恢复产生负面影响，并造成重大的社会经济损失。这种困境凸显了迫切需要将当前的抗震设计理念从以生命安全为中心的方法转变为以地震弹性为导向的设计策略。近年来，形状记忆合金作为一种高性能金属材料，因其优异的自定心性能和能量耗散性能而受到越来越多的关注。超弹性S MA u型阻尼器（S MA- uds）利用了板的弯曲特性，扩展了S MA在地震工程中的应用场景。因此，本研究提出了S MA-UDs作为公路桥梁剪切键的潜在应用。对S MA-UDs进行了循环拉压加载试验研究。通过各种加载协议对S MA-UDs的性能进行了评估。试验结果表明，在不同荷载条件下，旗形滞回线具有良好的稳定性，非常适合强震时的抗震设计。此外，还进行了详细的三维有限元分析，进一步研究了S MA-UDs的变形机理。最后，建立了在地震应用中实现S MA-UDs的分析模型。

Applicability study of offshore wind turbine blade model considering wind-wave-seis mic effects

Bin Ruan, Chongjin Liu, Suyang Wang, Renqiang Xi

doi:10.1016/j.tws.2026.114487

考虑风浪-地震效应的海上风力机叶片模型适用性研究

As offshore wind turbines (OWTs) continue to scale up, their blades are becoming increasingly slender. High-fidelity blade modeling is therefore essential for accurate prediction of system dynamics; however, the influence of different blade representations on finite-element (FE) results remains insufficiently quantified. Focusing on a 5-MW OWT, this study develops a unified modeling-and-an alysis framework compatible with beam elements (BM), simplified shells (SS), and composite shells (CS). The framework explicitly accounts for rotor rotation and pitch control and evaluates structural responses under combined wind–wave–seis mic loading. Results show that the choice of blade model markedly alters the OWT’s natural frequencies. Under high-frequency excitation, overly simplified blade models tend to overestimate tower-top displacement and tower-base shear, amplify inter-model shear discrepancies, and reshape the spatiotemporal distribution of tower stress peaks. Under coupled wind–wave–seis mic conditions, low-frequency seis mic input narrows inter-model differences in displacement and base shear. Overall, BM predictions align closely with those of the high-fidelity CS model, indicating greater reliability for dynamic-response assess ment.

随着海上风力涡轮机（owt）规模的不断扩大，它们的叶片变得越来越纤细。因此，高保真叶片建模对于系统动力学的准确预测至关重要；然而，不同叶片表现形式对有限元结果的影响仍然没有足够的量化。本研究以5mw的OWT为重点，开发了一个统一的建模和分析框架，兼容梁单元（BM）、简化壳（SS）和复合壳（CS）。该框架明确考虑了转子旋转和俯仰控制，并评估了结构在风波-地震联合载荷下的响应。结果表明，叶片模型的选择显著改变了叶片的固有频率。在高频激励下，过于简化的叶片模型容易高估塔顶位移和塔底剪切，放大模型间剪切差异，重塑塔顶应力峰值的时空分布。在风波-地震耦合条件下，低频地震输入缩小了模型间位移和基底剪切的差异。总体而言，BM预测与高保真CS模型密切相关，表明动态响应评估具有更高的可靠性。

Liquid nitrogen assisted -ice clamping strategy to suppress milling force-induced deformation and residual stress release deformation in thin-walled cylindrical shells

Lingqi Zeng, Tianran Liu, Lianqi Cheng, Hao Zhang, Kuo Liu, Haibo Liu, Yongqing Wang

doi:10.1016/j.tws.2026.114488

液氮辅助冰夹紧策略抑制薄壁圆柱壳铣削力致变形和残余应力释放变形

Thin-walled components with complex curved surfaces are susceptible to machining giving way to deformation due to weak rigidity during machining, while the machining residual stresses under mechanical-thermal load coupling will trigger macro-structural deformation through stress rebalancing after unclamping constraints. For this reason, this paper proposes a compound machining strategy integrating liquid nitrogen cooling and ice-based clamping to simultaneously suppress milling force-induced deformation and residual stress release deformation. This study employs an improved R-O model based on the stress-strain response of 6061-T6 aluminum alloy under cryogenic conditions. Through fitting and numerical inversion methods, Johnson-Cook constitutive parameters suitable for –165°C were identified, enabling the reconstruction of the material's constitutive model in deep cryogenic environments. Combining the material parameters, tool-workpiece contact relationship, and ice/aluminum interface model, a three-dimensional side milling finite element model for ice-supported thin-walled parts and a low-temperature two-dimensional orthogonal cutting model were constructed, and combined with the milling experiments of thin-walled cylindrical shells, the milling thermal/force, the transient stress evolution law, the characteristics of residual stress distribution on the surface of the low-temperature machined surface, and the machining deformation suppression mechanis m were systematically investigated. The results showed that liquid nitrogen cooling cut down the milling heat during machining alleviated the thermal stress gradient, and induced the formation of a residual stress state dominated by mechanical compressive stress on the machined surface. The liquid nitrogen-ice clamping synergistic process reduces the letting tool deformation by 63.05% and the machining residual stress-induced deformation by 86.5%. At the same time, the ultra-low temperature environment significantly inhibits the thermal activation process, leading to grain refinement (10.38% reduction), formation of fine and uniform dislocation structure, and increase in the proportion of s mall-angle grain boundaries (>20%), and synergistically improves the modulus of elasticity (15% increase) and deformation resistance of the material through the optimization of the weave structure (minimization of the polar density) and the pinning effect. Through fundamental research, this strategy successfully achieved high-precision machining of large-scale thin-walled array monolithic structures with a wall thickness of 0.8 mm and a diameter of 137.2 mm, validating its engineering applicability in the manufacturing of large aerospace components. This study provides theoretical foundations and innovative process solutions for low-stress precision machining of weakly rigid components in the aerospace field.

具有复杂曲面的薄壁构件在加工过程中刚度较弱，容易产生加工变形，而在机械-热载荷耦合作用下的加工残余应力会在解夹约束后通过应力再平衡引发宏观结构变形。为此，本文提出了液氮冷却与冰基夹紧相结合的复合加工策略，以同时抑制铣削力诱导变形和残余应力释放变形。本研究采用基于6061-T6铝合金在低温条件下应力应变响应的改进R-O模型。通过拟合和数值反演方法，确定了适用于-165℃的Johnson-Cook本构参数，实现了深低温环境下材料本构模型的重建。结合材料参数、刀工接触关系和冰/铝界面模型，建立了冰支承薄壁件的三维侧铣有限元模型和低温二维正交切削模型，并结合薄壁圆柱壳的铣削实验，得到了铣削热/力、瞬态应力演化规律；系统地研究了低温加工表面残余应力分布特征及加工变形抑制机理。结果表明：液氮冷却降低了加工过程中的铣削热量，缓解了热应力梯度，导致加工表面形成以机械压应力为主的残余应力状态；液氮-冰夹紧协同工艺可使刀具变形减少63.05%，加工残余应力诱发变形减少86.5%。同时，超低温环境显著抑制了热活化过程，导致晶粒细化（减少10.38%），形成细小均匀的位错结构，小角度晶界比例增加（>20%）。并通过优化编织结构（极值密度最小化）和钉住效果，协同提高材料的弹性模量（增加15%）和抗变形能力。通过基础研究，该策略成功实现了壁厚为0.8 mm、直径为137.2 mm的大型薄壁阵列单片结构的高精度加工，验证了其在大型航空航天部件制造中的工程适用性。本研究为航空航天领域弱刚性零件的低应力精密加工提供了理论基础和创新工艺解决方案。

A review on advanced composite materials in marine structures

Genghui Xu, Guangyong Sun, Wentao He, Xiaoming Deng, Xinghua Liu, Weixin Zhou, Jingxi Liu

doi:10.1016/j.tws.2026.114490

海洋结构中先进复合材料研究进展

Composites are widely utilized in engineering structures due to superb properties, such as, low density, high specific strength, impact resistance, energy absorption, and vibration and acoustic characteristics. With advances in material properties and processing technologies, the load-bearing capacity of composite structures has been continuously enhanced. Ship structures endure conditions involving impact, vibration and radiation noise, which raise great challenges for conventional materials. In response to these challenges, extensive studies have been conducted on composites with various properties. This paper presents a comprehensive review of experimental, theoretical and numerical studies over the past decade on mechanics, vibration and acoustics of composites. The primary objectives are to systematically summarize the multifunctional characterisation of composite and evaluate potential applications in shipbuilding. Specifically, this review examines failure modes of composites under various impact loadings, an alyzes the dynamic responses of typical structures under excitations, and compares differences in acoustic performance among various composite types. Furthermore, the research on advanced composite processing technology and potential design methods are summarised and outlined.

复合材料具有低密度、高比强度、抗冲击、吸能、振动和声学等优良性能，在工程结构中得到了广泛的应用。随着材料性能和加工技术的进步，复合材料结构的承载能力不断增强。船舶结构所承受的冲击、振动和辐射噪声对传统材料提出了巨大挑战。为了应对这些挑战，人们对各种性能的复合材料进行了广泛的研究。本文对近十年来在复合材料力学、振动和声学方面的实验、理论和数值研究进行了综述。主要目的是系统地总结复合材料的多功能特性，并评估其在造船中的潜在应用。具体而言，本文研究了复合材料在各种冲击载荷下的破坏模式，分析了典型结构在激励下的动力响应，并比较了不同类型复合材料在声学性能上的差异。并对先进复合材料加工技术和潜在设计方法的研究进行了总结和概述。

A Damage-Controllable Square CFST Column Incorporating a Discontinuously Corrugated Steel Tube: Concept, Experimental Testing, and Numerical Validation

Zhuo Zhang, Xin-Yu Zhao

doi:10.1016/j.tws.2026.114491

包含不连续波纹钢管的可控制损伤方形CFST柱：概念、实验测试和数值验证

Square concrete-filled steel tubular (CFST) columns provide weaker confinement than their circular counterparts, often resulting in premature local buckling and limited ductility. Inspired by corrugation strategies introduced for circular CFSTs, this study experimentally and numerically investigated the axial behavior of square CFST columns with discontinuous corrugations intentionally formed on the steel tube walls to trigger a controllable damage mechanis m. Results showed that introducing corrugations inevitably reduced the peak axial capacity by 4%–16% due to local stiffness weakening, yet this intentional reduction effectively dispersed damage, mitigated buckling localization, and achieved a stable, damage-controlled failure mode. The notable increase in ductility index (61.8%–122.1%) reflects a trade-off between strength and deformability rather than a direct strength enhancement. The finite-element model approximately reproduced the full load–displacement responses with engineering accuracy and clarified the interaction between corrugation geometry and confinement. Parametric an alyses revealed that corrugation length governed the strength–ductility balance. A configuration with length close to the effective width is recommended, as it substantially improved ductility and post-peak behavior with only a modest strength loss, offering practical potential for damage-controllable CFST designs.

方形钢管混凝土（CFST）柱比圆形钢管混凝土柱提供更弱的约束，往往导致过早的局部屈曲和有限的延性。受圆形钢管混凝土波纹策略的启发，本研究对方形钢管混凝土柱的轴向行为进行了实验和数值研究，在钢管壁上故意形成不连续波纹，以触发可控损伤机制。结果表明，由于局部刚度减弱，波纹的引入不可避免地使峰值轴向承载力降低了4%-16%，但这种有意的降低有效地分散了损伤，减轻了屈曲局部化，并实现了稳定的、损伤控制的破坏模式。延性指数的显著增加（61.8%-122.1%）反映了强度和变形能力之间的权衡，而不是直接的强度增强。该有限元模型以工程精度近似再现了全荷载-位移响应，并阐明了波纹几何形状与约束之间的相互作用。参数分析表明，波纹长度支配着强度-延性平衡。长度接近有效宽度的结构是推荐的，因为它大大提高了延性和峰后行为，只有适度的强度损失，为损伤可控的CFST设计提供了实际的潜力。

Multiscale a nalysis of the effect of asymmetric structures on the in-plane impact mechanical properties of hierarchical honeycombs

Hexiang Wu, Haiqiang Zhang, Ying Liu, Quansheng Sun, Xinchun Zhang

doi:10.1016/j.tws.2026.114492

非对称结构对分层蜂窝面内冲击力学性能影响的多尺度分析

A novel multiscale hierarchical honeycomb incorporating asymmetric design at the honeycomb, cell, and hierarchical levels is proposed based on the multiscale characteristics of hierarchical materials. By varying the inclination angle of one sidewall in the unit cells across different scales, multiscale asymmetric configurations were developed. The in-plane mechanical behavior and energy absorption performance under quasi-static compression were systematically examined through experiments, finite element (FE) simulations, and theoretical an alyses. The results reveal that asymmetry at different scales exerts distinct effects on the plateau stress, specific energy absorption (SEA), and dynamic Poisson’s ratio. In particular, asymmetry at the cell scale has the most pronounced impact on the zero-order plateau stress and SEA; asymmetry at the hierarchical scale mainly influences the first-order plateau stress; while the arrangement at the honeycomb scale shows a comparatively minor effect on the overall response. Under specific geometric conditions, the structure exhibits a negative Poisson’s ratio while maintaining high load-bearing and energy absorption capacities. This study is the first to introduce asymmetric design into a multiscale hierarchical honeycomb, elucidating the scale-dependent effects of asymmetry on macroscopic mechanical properties. The findings provide a new design strategy and theoretical foundation for controlling deformation and energy absorption in multiscale honeycombs.

基于层次化材料的多尺度特性，提出了一种在蜂巢、细胞和层次化水平上结合非对称设计的新型多尺度层次化蜂窝结构。通过在不同尺度上改变单晶胞内侧壁的倾角，形成了多尺度的不对称结构。通过实验、有限元模拟和理论分析，系统地研究了准静态压缩条件下的面内力学行为和吸能性能。结果表明，不同尺度下的不对称对高原应力、比能吸收（SEA）和动态泊松比有不同的影响。其中，胞元尺度上的不对称性对零级高原应力和SEA的影响最为显著；层次尺度上的不对称性主要影响一级高原应力；而蜂窝尺度上的排列对整体响应的影响相对较小。在特定的几何条件下，结构表现为负泊松比，同时保持较高的承载和能量吸收能力。本研究首次将不对称设计引入到多尺度分层蜂窝中，阐明了不对称对宏观力学性能的尺度依赖性影响。研究结果为控制多尺度蜂窝的变形和能量吸收提供了新的设计策略和理论基础。

Interface micromechanical evolution of 3D braided composites under shock-cooling impact

Bo Li, Jingjing Chen, Baozhong Sun, Bohong Gu, Meiqi Hu

doi:10.1016/j.tws.2026.114493

冲击冷却冲击下三维编织复合材料界面细观力学演化

Due to the designability and structural integrity, braided carbon fiber reinforced polymer (CFRP) composite containers enable ultra-low temperature applications in aerospace engineering, where shock-cooling impact is critically prevalent. The carbon fiber/epoxy interface micromechanical properties are severely affected during shock-cooling impact. The evolution of interface micromechanical in braided CFRP composites under shock-cooling impact was investigated through testing and simulation. The influence of the braided structure micromechanical was assessed by subjecting 3D braided composites to shock-cooling impact in a vacuum chamber while recording real-time temperature and strain. Interface micromechanical damage was examined using microscopic and characterized with atomic force microscope (AFM) and nanoindentation. A molecular dynamics model was adopted to evaluate the interaction between epoxy and fibers, showing a 28.7% reduction in epoxy free volume fraction as temperature fell from 25°C to -196°C. Through experiments and simulations, shock-cooling impact generated high interfacial stresses and reduced local modulus and hardness, promoting crack formation and thinner interface. Understanding shock-cooling impact interfacial effects in braided CFRP composites is essential for interface design and material selection to guarantee reliable cryogenic performance.

由于可设计性和结构完整性，编织碳纤维增强聚合物（CFRP）复合材料容器可以在冲击冷却影响非常普遍的航空航天工程中实现超低温应用。在冲击冷却过程中，碳纤维/环氧树脂界面的微观力学性能受到严重影响。通过试验和模拟研究了CFRP编织复合材料在冲击冷却冲击作用下界面细观力学的演化规律。通过在真空室中对三维编织复合材料进行冲击冷却冲击，同时记录实时温度和应变，评估编织结构的微观力学影响。采用原子力显微镜（AFM）和纳米压痕技术对界面进行微观力学损伤检测和表征。采用分子动力学模型评价环氧树脂与纤维之间的相互作用，结果表明，温度从25℃降至-196℃时，环氧树脂的游离体积分数降低了28.7%。通过实验和模拟，冲击冷却冲击产生高界面应力，降低局部模量和硬度，促进裂纹形成，界面变薄。了解编织CFRP复合材料的冲击冷却冲击界面效应对界面设计和材料选择至关重要，以确保可靠的低温性能。