【新文速递】2025年11月17日复合材料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 2 篇，International Journal of Plasticity 2 篇，Thin-Walled Structures 5 篇International Journal of Solids and StructuresOptimization of sandwich plate with re-entrant auxetic core for improved performance under transverse impact loadsRahul Reddy Gajjala, Prasun Janadoi:10.1016/j.ijsolstr.2025.113764为提高横向冲击载荷下的性能，夹层板的再入式辅助芯的优化设计The present study utilizes parametric optimization of the re-entrant auxetic core of a sandwich plate to enhance its performance against transverse impact loads. The optimization is performed by coupling finite element an alysis with the genetic algorithm optimization scheme, keeping the material volume of the structure constant. Effective material properties of the re-entrant unit cell that are calculated using a representative volume element become input to the finite element formulation for predicting the macroscopic response of the sandwich structure. A 9-noded quadrilateral element is used to capture the curvature of the plate accurately, while the plate’s kinematics are defined using first-order shear deformation theory. The finite element formulation is validated with the published literature to verify its accuracy. The adopted finite element-based optimization study results in significantly different optimal configurations of the re-entrant sandwich structures for various cases considered in the study. These optimal configurations show a substantial improvement in the macroscopic response when compared with some randomly chosen configurations. To prove the authenticity of the optimization results, a simple experiment is performed, which demonstrates an excellent correlation. Thus, the present article encapsulates a scientific method to arrive at efficient designs for the re-entrant auxetic sandwich structures, which will have potential applications in engineering fields.为了提高夹层板抗横向冲击载荷的性能，本研究采用参数优化的方法对夹层板的再入式辅助芯进行了优化。在保持结构材料体积不变的情况下，采用有限元分析与遗传算法耦合优化方案进行优化。使用代表性体积元计算的可重入单元格的有效材料特性，将输入到用于预测夹层结构宏观响应的有限元公式中。采用9节点四边形单元精确捕捉板的曲率，采用一阶剪切变形理论定义板的运动学。用已发表的文献对有限元公式进行了验证，以验证其准确性。所采用的基于有限元的优化研究结果表明，在研究中考虑的各种情况下，可重入夹层结构的最优构型存在显著差异。与一些随机选择的构型相比，这些最优构型在宏观响应方面表现出明显的改善。为了证明优化结果的真实性，进行了简单的实验，证明了良好的相关性。因此，本文总结了一种科学的方法，以达到有效的设计再入式减力夹层结构，这将有潜在的应用在工程领域。Journal of the Mechanics and Physics of SolidsIndentation-based anisotropic material parameter identifiability: Validation on a synthetic soft tissue phantomAmit Ashkenazi, Adi Shultz, Lee Jordan, Dana Solavdoi:10.1016/j.jmps.2025.106417 基于压痕的各向异性材料参数可识别性：在合成软组织模型上的验证Accurate quantification of soft tissue material parameters is essential for tissue mechanics simulations, medical device design, surgical planning, and non-invasive diagnostics. Finite element an alysis (FEA) is commonly employed, but generating accurate simulations often requires patient- and location-specific tissue material parameters. Although soft tissue constitutive models are well-developed, practical implementation is limited by the invasive nature of experiments required for fitting model parameters. Non-invasive methods, such as indentation and suction, offer in vivo applicability but typically lack an alytical solutions that would allow direct fitting of material parameters. Consequently, parameter identification becomes an inverse problem solved via FEA, which is often ill-posed, yielding multiple sets of seemingly optimal parameters, especially with limited experimental data. This non-uniqueness undermines the reliable prediction of tissue response under varying loads. This study investigates the identifiability of transversely isotropic hyperelastic material parameters through macro-scale indentation, combining simultaneous measurements of force and full-field surface deformation. We use a simplified two-parameter constitutive model to represent a soft composite phantom and compare the homogenized parameters identified through indentation with those obtained from separate ana lyses of the matrix and fiber materials. Our findings indicate that a measurement error of 5% leads to certainty bounds of ±5.2% and ±28% for the isotropic and anisotropic parameters, respectively, when utilizing combined force–deformation data. In contrast, when only force data is considered, they are ±22.5% and ±210%, respectively. These results demonstrate that surface deformation measurements are crucial for uniquely identifying anisotropic hyperelastic parameters through indentation. Further research is needed to evaluate identifiability in more complex models and in vivo indentation scenarios.软组织材料参数的精确量化对于组织力学模拟、医疗设备设计、手术规划以及无创诊断至关重要。有限元分析（FEA）通常被采用，但生成准确的模拟往往需要针对患者和特定位置的组织材料参数。尽管软组织本构模型已发展成熟，但实际应用受限于拟合模型参数所需的侵入性实验。非侵入性方法，如压入和抽吸，具有体内适用性，但通常缺乏能直接拟合材料参数的解析解。因此，参数识别成为通过 FEA 解决的逆问题，这通常是不适定的，会产生多组看似最优的参数，尤其是在实验数据有限的情况下。这种非唯一性削弱了在不同载荷下对组织反应进行可靠预测的能力。本研究通过宏观尺度的压痕实验来探究横观各向同性超弹性材料参数的可识别性，结合了力和全场表面变形的同时测量。我们使用一个简化的两参数本构模型来表示软复合体模型，并将通过压痕识别出的均质化参数与分别对基质和纤维材料进行单独分析所获得的参数进行比较。我们的研究结果表明，当利用力 - 变形组合数据时，5% 的测量误差会导致各向同性和各向异性参数的确定性界限分别为 ±5.2% 和 ±28%。相比之下，仅考虑力数据时，它们分别为 ±22.5% 和 ±210%。这些结果表明，表面变形测量对于通过压痕唯一识别各向异性超弹性参数至关重要。需要进一步的研究来评估更复杂模型和体内压痕场景中的可识别性。Mechanics of MaterialsA grain boundary region model to capture grain size and misorientation effects on elasto-plastic response of polycrystalsDevesh Tiwari, Ayub Khan, Pierre-Antony Deschênes, Daniel Paquet, Pritam Chakrabortydoi:10.1016/j.mechmat.2025.105541一个晶界区域模型来捕捉晶粒尺寸和取向错误对多晶弹塑性响应的影响Grain Boundaries (GBs) disrupt the motion of dislocations and thereby affect the elasto-plastic deformation behavior of polycrystalline alloys. A majority of conventional polycrystal plasticity models represent GBs as sharp interfaces and don’t incorporate GB micro-mechanics. In this work, a novel constitutive formulation for finitely thick GB region is developed which incorporates properties of all the adjoining grains. The GB model is based on penalizing the slip rate on the slip systems of single crystals in the GB region with an extra activation energy term. The energy penalty is based on minimizing the remnant dislocation line on GB for incoming and outgoing slip systems and evolves with slip accumulation. The size dependent elasto-plastic response of polycrystals is captured in this model by incorporating Geometrically Necessary Dislocations (GNDs) in addition to the Statistically Stored Dislocations (SSDs). The model has been implemented in a Crystal Plasticity Finite Element Method (CPFEM) code and applied to simulate the plane strain uni-axial tensile deformation of FCC polycrystals. The an alyses show that the model is able to capture: (i) the single crystal response for a bicrystal with zero misorientation; and (ii) the dependence of Hall–Petch factor on misorientation. A normalized critical GB thickness value has also been derived which renders the macroscopic response insensitive to the GB region size. Polycrystal CPFEM simulations demonstrate that the model can capture the strain dependence of Hall–Petch factor reasonably well.晶界破坏位错的运动，从而影响多晶合金的弹塑性变形行为。传统的多晶塑性模型大多将晶界表示为尖晶界，没有考虑晶界的微观力学。在这项工作中，开发了一个新的有限厚GB区域的本构公式，它包含了所有相邻晶粒的特性。GB模型是基于用一个额外的活化能项来惩罚GB区单晶滑移系统的滑移率。能量惩罚是基于最小化输入和输出滑移系统的残余位错线，并随着滑移积累而演变。该模型通过结合几何必要位错（GNDs）和统计存储位错（ssd）来捕获多晶体的尺寸相关弹塑性响应。该模型已在晶体塑性有限元（CPFEM）程序中实现，并应用于FCC多晶的平面应变单轴拉伸变形模拟。分析表明，该模型能够捕获：(1)零取向错的双晶体的单晶响应；(2)霍尔-佩奇因子对定向错误的依赖关系。我们还推导了一个归一化临界GB厚度值，使宏观响应对GB区域大小不敏感。多晶CPFEM仿真结果表明，该模型能较好地捕捉到Hall-Petch因子的应变依赖性。Multi-scale compaction behavior of granular compositeSuraj Ravindran, Addis Kidanedoi:10.1016/j.mechmat.2025.105544颗粒复合材料的多尺度压实行为This study presents a multiscale experimental investigation and characterization of the formation and propagation of compaction waves in an energetic material simulant, polymer-bonded sugar (PBS), under impact loading. Local and macroscale deformation measurements during loading were performed using ultrahigh-speed photography combined with digital image correlation (DIC). The compaction wave velocity and propagation parameters were calculated from macroscale experimental data. A weak-shock-type compaction profile with a s mooth front was observed at intermediate impact velocities. After a brief period of relatively stable compaction propagation, the wavefront was observed to widen as it propagated. Mesoscale measurements revealed a rough compaction front resulting from the formation of force chains, local viscous flow of the binder, and crystal fracture. The widening of the compaction wave is attributed to energy dissipation caused by viscous binder flow and local crystal fracture. Crystal fractures occurred at relatively low average stress levels and were associated with the formation of force chains. Finally, the effects of impact velocity and volume fraction on local deformation mechanis ms during compaction wave formation are discussed.本文通过多尺度实验研究了冲击载荷下含能材料模拟物聚合物键合糖（PBS）中压实波的形成和传播特性。采用超高速摄影结合数字图像相关（DIC）技术对加载过程中的局部和宏观变形进行测量。根据宏观实验数据计算了压实波速和传播参数。在中等冲击速度下，观察到具有光滑锋面的弱冲击型压实剖面。经过一段相对稳定的压实传播后，观察到波前随着传播而变宽。中尺度测量显示，由于力链的形成、粘合剂的局部粘性流动和晶体断裂，形成了一个粗糙的压实锋。压实波的扩大主要是由于黏结剂流动和局部晶体断裂引起的能量耗散。晶体断裂发生在相对较低的平均应力水平，并与力链的形成有关。最后，讨论了冲击速度和体积分数对压实波形成过程中局部变形机制的影响。International Journal of PlasticityNonlinear chemomechanical modeling of hydrogen diffusion in super duplex stainless steel and comparison with x-ray diffraction measurementsDavid Lindblom, Menghao Liu, Jinshan Pan, Robin Woracek, Carl F.O. Dahlbergdoi:10.1016/j.ijplas.2025.104546超级双相不锈钢中氢扩散的非线性化学力学建模及与x射线衍射测量的比较A coupled hydrogen (H) diffusion and higher-order strain gradient plasticity model is used to predict H localization in the ferrite ( α ) and austenite ( γ ) phases of super duplex steel under plane stress conditions. The geometry and finite element (FE) mesh are derived from optical micrograph images of the phase morphology, ensuring a realistic representation of the alloy’s microstructure. The model highlights the role of individual phases in coupled diffusion–mechanics interactions and demonstrates that the phase morphology significantly impacts the localization of H in the material. The results indicate that plastic strains in the ferrite phase exert a much greater influence on the spatial distribution of H than in the austenite phase. Finally, results of the model compare well with in situ X-ray diffraction (XRD) measurements of the temporal evolution of the strain induced by H charging. These findings provide valuable insight for future alloy design strategies aimed at mitigating H localization and preventing embrittlement.采用氢(H)扩散和高阶应变梯度塑性耦合模型预测了平面应力条件下超级双相钢铁素体（α）和奥氏体（γ）中H的局部化。几何和有限元（FE）网格来源于相形态的光学显微图像，确保了合金微观结构的真实表现。该模型强调了单个相在耦合扩散力学相互作用中的作用，并表明相形态显著影响H在材料中的局部化。结果表明，铁素体相的塑性应变对H的空间分布的影响远大于奥氏体相。最后，该模型的结果与原位x射线衍射（XRD）测量的H电荷引起的应变的时间演变结果进行了比较。这些发现为未来旨在减轻H局部化和防止脆化的合金设计策略提供了有价值的见解。Ascertaining the plastic deformation mechanis ms of polycrystalline extruded Zn through in situ SEM/EBSD mechanical testsAlireza Rezaei, Nafiseh Mollaei, Maral Sarebanzadeh, Biaobiao Yang, Seyed Mahmood Fatemi, Javier LLorcadoi:10.1016/j.ijplas.2025.104548通过原位SEM/EBSD力学试验确定多晶挤压锌的塑性变形机理The plastic deformation micro-mechanis ms of extruded pure Zn deformed in tension along the extrusion direction were investigated by means of in situ scanning electron microscopy (SEM) integrated with electron back-scatter diffraction (EBSD). Plastic deformation began with the activation of basal slip in grains with the highest Schmid factor while the incompatibility of deformation between neighbour grains was accommodated by grain boundary sliding. The geometrically necessary dislocation density increased sharply from 1.53 × 1013 m⁻² to 9.03 × 1013 m⁻² when applied strain reached 6.7%, and this increase coincides with the strong initial strain hardening region. The incompatibility of deformation between neighbour grains was accommodated by grain boundary sliding at strains above 3.3%, which somehow limited the strain hardening rate. Evidence of <c+a> pyramidal II slip was also found through slip trace an alysis from the early stages of deformation, i.e. 1.6% strain, but it was always limited to a s mall fraction of suitably oriented grains. Moreover, trans mission electron microscopy observations showed that many <c+a> pyramidal dislocations were dissociated into the basal plane and became sessile. {10 1 ¯ 2}<10 1 ¯ 1 ¯ > compression twins were nucleated at 3.3% strain and the fraction of grains undergoing twinning as well as the area fraction of twins increased proportionally to the applied strain. Twinning was favoured by the fiber texture and the twin variant with the highest Schmid factor was primarily activated in each grain. The contribution of twinning to the total strain was limited (around 11% when the applied strain was 16.7%). The strain hardening rate decreased sharply beyond 6.7% and the hardening contribution of basal slip was balanced by grain boundary slding and compression twinning. Finally, a high fraction of sub-grain boundaries that trigger recrystallization at larger strains ws found at 16.7%. These observations reveal the sequence and interaction of plastic deformation mechanis ms in Zn, which may help design novel Zn alloys with improved mechanical properties.采用原位扫描电子显微镜（SEM）和电子背散射衍射（EBSD）相结合的方法，研究了挤压纯锌沿挤压方向拉伸变形的微观塑性变形机理。塑性变形开始于施密德系数最高的晶粒< 1 >基底滑移的激活，而相邻晶粒之间的变形不相容由晶界滑动调节。当应变达到6.7%时，几何上必要的位错密度从1.53 × 1013 m⁻²急剧增加到9.03 × 1013 m⁻²，这种增加与强的初始应变硬化区一致。当应变大于3.3%时，晶界滑移调节了相邻晶粒间变形的不相容，这在一定程度上限制了应变硬化速率。变形初期的滑移迹分析也发现了<c+a>锥体II滑移的证据，即1.6%的应变，但始终局限于一小部分合适取向的晶粒。此外，透射电镜观察显示，许多<c+a>锥体 位错被解离到基面上并成为无柄。{10¯2}<10 1¯1¯>压缩孪晶在3.3%应变下成核，孪晶的晶粒比例和孪晶的面积比例随应变的增加而成比例增加。纤维织构有利于孪晶形成，施密德因子最高的孪晶变异主要在各粒中被激活。孪生对总应变的贡献是有限的（当施加应变为16.7%时约为11%）。应变硬化率急剧下降至6.7%以上，基底滑移的硬化作用被晶界滑移和压缩孪晶所平衡。最后，16.7%的亚晶界在较大的应变下触发再结晶。这些观察结果揭示了Zn中塑性变形机制的顺序和相互作用，这可能有助于设计具有更好力学性能的新型Zn合金。Thin-Walled StructuresStructural performance of steel beams strengthened with prestressed CFRP plates: Steel beam-CFRP plate string systemsHai-Tao Wang, Zhun Wang, Qiong Wu, Gaoming Zhu, Xian-Jie Liudoi:10.1016/j.tws.2025.114251预应力CFRP板加固钢梁的结构性能：钢梁-CFRP板串系统By using unbonded prestressed carbon fibre-reinforced polymer (CFRP) plates to strengthen existing steel beams, the steel beam-CFRP plate string system can be formed, which effectively improves structural performance. Nevertheless, the relevant working mechanis m and the flexural resistance prediction model have not been comprehensively investigated. In this study, elaborate three-dimensional finite element models were first developed to reveal the working mechanis m of the steel beam-CFRP plate string system and to investigate key factors that affect the structural performance. Subsequently a general mechanical model was proposed to quantify the structural resistance of the strengthened steel beam. Both the numerical and ana lytical models were validated against experimental results from the literature. The study results indicated that the total prestressing force in the CFRP plate and the strut height play pivotal roles in enhancing the structural resistance. For the modelled specimens, the yield load increased by 22.8%-43.4% as the prestress level increased from 30% to 70%, and by 6.2%-42.3% as the strut height increased from 0 to 150 mm, compared to the unstrengthened beam. In contrast, the CFRP area and strut spacing have only a slight impact on the structural resistance under the same total prestressing force, with variations in yield load remaining below 5%. Moreover, the proposed mechanical model demonstrated excellent accuracy in predicting the flexural resistance of the strengthened beam, confirming its potential for use in the practical strengthening design.采用无粘结预应力碳纤维增强聚合物（CFRP）板对既有钢梁进行加固，形成钢梁-CFRP板串体系，有效地提高了结构性能。然而，相关的工作机理和抗弯阻力预测模型尚未得到全面的研究。在本研究中，首次建立了精细的三维有限元模型，揭示了钢梁-碳纤维布板串体系的工作机理，并研究了影响结构性能的关键因素。随后，提出了一种通用力学模型来量化加固钢梁的结构阻力。数值模型和解析模型都与文献中的实验结果进行了验证。研究结果表明，CFRP板的总预应力和支撑高度对提高结构抗力起着关键作用。与未加固梁相比，当预应力水平从30%增加到70%时，屈服荷载增加22.8% ~ 43.4%，当杆高从0增加到150 mm时，屈服荷载增加6.2% ~ 42.3%。相比之下，在相同的总预应力下，碳纤维布面积和支撑间距对结构阻力的影响很小，屈服荷载的变化保持在5%以下。此外，所提出的力学模型在预测加固梁的抗弯阻力方面表现出优异的准确性，证实了其在实际加固设计中的应用潜力。Anti-thermal buckling behavior of NiTi shape memory alloy thin plates: Experiment and modelingYan Cheng, Jun Wang, Yahui Zhang, Xiaojun Gu, Jihong Zhu, Weihong Zhangdoi:10.1016/j.tws.2025.114239NiTi形状记忆合金薄板的抗热屈曲行为：实验与建模Thermal buckling presents a significant challenge to the stability of thin-walled structures exposed to elevated temperatures. The thermally induced phase transformation deformation of NiTi shape memory alloys can counteract thermal expansion, thereby exhibiting the so-called anti-thermal buckling behavior. This study experimentally investigates the out-of-plane thermal buckling deformation, as well as the stress and strain responses, of NiTi alloy thin plates under increasing temperature. The anti-thermal buckling mechanis m is systematically elucidated. Through the introduction of appropriate pre-strain, thermally induced phase transformation deformation can eliminate out-of-plane deformation caused by thermal buckling and also reduce thermal stress. A theoretical model was developed based on elastic buckling theory and quadruple strain decomposition to explain the deformation mechanis m and to predict the effects of pre-strain on the stress and strain responses of NiTi alloy thin plates. The comparison between experimental results and theoretical predictions confirms the accuracy and effectiveness of the proposed model. This study offers both theoretical and experimental foundations for the design of thermally stable structures reinforced with S MA thin plates.热屈曲对高温下薄壁结构的稳定性提出了重大挑战。NiTi形状记忆合金的热诱导相变变形可以抵消热膨胀，从而表现出所谓的抗热屈曲行为。实验研究了NiTi合金薄板在温度升高条件下的面外热屈曲变形及应力应变响应。系统地阐述了抗热屈曲机理。通过引入适当的预应变，热诱导相变变形可以消除热屈曲引起的面外变形，降低热应力。基于弹性屈曲理论和四重应变分解理论，建立了NiTi合金薄板变形机理的理论模型，预测了预应变对其应力应变响应的影响。实验结果与理论预测结果的比较证实了所提模型的准确性和有效性。该研究为S MA薄板增强热稳定结构的设计提供了理论和实验依据。Low-frequency bandgaps in locally resonant metamaterial rotating beamsJie Tang, Ke Sun, Tielin Wang, Jiachun Zhang, Meng Li, Yinghui Li, Huatao Chen, Dengqing Caodoi:10.1016/j.tws.2025.114247 局部共振超材料旋转光束中的低频带隙Rotating slender structures are widely employed in aerospace, energy engineering, and industrial manufacturing. However, suppressing vibrations of rotating beam structures under low-frequency excitation remains a significant challenge. The concept of locally resonant structures offers a novel approach for isolating vibrations in rotating slender structures. Since the propagation of elastic waves is suppressed within a frequency range near the local resonators’ natural frequency, a profound attenuation band, called ”bandgaps,” appears in the trans missibility curve. Consequently, vibration isolation at specific frequencies can be achieved by exploiting this bandgaps characteristic. This study initiates from the design of a curved-beam locally resonant resonator, characterized by high structural integrity and simplicity. Static ana lysis is performed, and structural parameter optimization is employed to achieve quasi-zero stiffness (QZS) characteristics in the local resonator. The QZS curved-beam local resonator is then integrated with the host beam structure, resulting in a QZS locally resonant metamaterial cantilever beam. Subsequently, the dynamic model of the rotating QZS locally resonant cantilever beam is established based on Euler–Bernoulli beam theory. The governing equations of the beam are discretized using the Galerkin method. The dynamic response is then solved employing the Incremental Harmonic Balance (IHB) method combined with the pseudo-arc length continuation technique, and the influence of various parameters on vibration isolation performance is ana lyzed. Finally, rotational vibration experiments are conducted on the locally resonant beam. These experiments elucidate the structure’s low-frequency bandgaps characteristics and its low-frequency vibration isolation performance achieved by leveraging the bandgaps, thereby validating the theoretical findings. This work provides a novel avenue for vibration mitigation in rotating slender structures.旋转细长结构广泛应用于航空航天、能源工程和工业制造等领域。然而，旋转梁结构在低频激励下的振动抑制仍然是一个重大的挑战。局部共振结构的概念为隔离旋转细长结构的振动提供了一种新的方法。由于弹性波的传播被抑制在本地谐振器固有频率附近的频率范围内，因此在透射率曲线中出现了一个称为“带隙”的深度衰减带。因此，可以通过利用这种带隙特性来实现特定频率下的隔振。本研究从结构完整性高、结构简单的弯梁局部谐振腔的设计入手。进行了静力分析，并采用结构参数优化实现了局部谐振腔的准零刚度特性。然后将QZS弯曲光束局部谐振器与主光束结构集成，形成QZS局部谐振超材料悬臂梁。随后，基于欧拉-伯努利梁理论，建立了旋转QZS局部谐振悬臂梁的动力学模型。采用伽辽金方法对梁的控制方程进行离散化。采用增量谐波平衡法结合伪弧长延续技术求解系统的动态响应，分析了各参数对隔振性能的影响。最后，对局部共振梁进行了旋转振动实验。这些实验阐明了结构的低频带隙特性以及利用带隙实现的低频隔振性能，从而验证了理论研究结果。这项工作为旋转细长结构的减振提供了一条新的途径。Experimental and Numerical Investigation of Corrosion Effects on the Seis mic Performance of Shear LinksSong YANG, Shansuo ZHENG, Liguo LIU, Zhongxiang TIAN, Yongming LI, Yan XIAOdoi:10.1016/j.tws.2025.114249腐蚀对剪力杆抗震性能影响的实验与数值研究Four corroded shear link specimens were prepared using accelerated corrosion techniques, and 3D laser scanning was employed to capture their surface morphology and corrosion depth distribution. Subsequently, quasi-static cyclic loading tests were conducted to investigate the effects of corrosion and web thickness on the failure modes, hysteretic behavior, energy dissipation capacity, and overstrength of shear links. Based on experimental findings, a finite element (FE) methodology was developed. This methodology stochastically assigns thickness reductions at nodal points on steel plates to accurately represent the surface morphology changes caused by corrosion. A parametric an alysis of 245 corroded shear links was conducted to evaluate the influence of corrosion level, web height-to-thickness ratio, and flange-to-web ratio on overstrength. Finally, a predictive model for the overstrength factor of corroded shear links was established using nonlinear regression a nalysis. The results indicated that the corrosion depth distribution in steel plates approximately follows a log-normal distribution. Failures of all corroded shear links were primarily attributed to severe shear buckling-induced web tearing. As corrosion level increased and web thickness reduced, significant deterioration was observed in the bearing capacity, deformation capacity, energy dissipation, and overstrength of shear links. Experimental validation demonstrated that the developed FE methodology effectively captures the adverse mechanical effects of non-uniform corrosion, achieving high predictive accuracy. Furthermore, the prediction error of the proposed model for the overstrength of corroded shear links, based on the parametric an alysis, was maintained within 10%.采用加速腐蚀技术制备了4个腐蚀剪切连杆试件，采用三维激光扫描技术捕获了试件的表面形貌和腐蚀深度分布。随后，进行了准静态循环加载试验，研究了腐蚀和腹板厚度对剪力杆破坏模式、滞回行为、耗能能力和超强的影响。基于实验结果，提出了一种有限元分析方法。该方法随机分配钢板节点处的厚度减小量，以准确表示腐蚀引起的表面形貌变化。通过对245个腐蚀剪切连杆进行参数化分析，评估腐蚀程度、腹板高厚比和翼缘腹板比对超强度的影响。最后，采用非线性回归分析方法，建立了腐蚀剪力杆超强度因子的预测模型。结果表明：钢板腐蚀深度近似服从对数正态分布；所有腐蚀剪切环节的破坏主要是由于严重的剪切屈曲引起的腹板撕裂。随着腐蚀程度的增加和腹板厚度的减小，剪力杆的承载力、变形能力、能量耗散和超强都出现了明显的恶化。实验验证表明，所开发的有限元方法有效地捕获了非均匀腐蚀的不利力学影响，实现了较高的预测精度。此外，基于参数分析的腐蚀剪力杆超强度模型预测误差保持在10%以内。Multi-ribs repair of thin steel plate shear walls damaged by earthquake: Comparison of orthogonal and oblique multi-ribsJin-guang Yu, Pei-zhou Zhang, Hai-sheng Yu, Chu Zhao, Wei-hui Zhong, Jay Shendoi:10.1016/j.tws.2025.114250地震破坏薄钢板剪力墙的多肋修复：正交与斜多肋的比较To study the repair methods of thin steel plate shear wall (SPSWs) after seis mic damage, this paper conducts two-stage quasi-static tests on three SPSWs specimens with a scale ratio of 1/3, and compares and an alyzes the hysteretic performance of unrepaired specimen, orthogonal multi-ribs repair specimen, and oblique multi-ribs repair specimen under the action of two earthquake. The results show that the orthogonal multi-ribs repair increases the bearing capacity of the seis mic-damaged SPSWs by 11.46 %, the initial stiffness by 67.08 %, the energy dissipation capacity by 105.12 %, and the ductility by 11.14 %. The oblique multi-ribs repair increases the bearing capacity of the seis mic-damaged SPSWs by 22.83 %, the initial stiffness by 88.01 %, the energy dissipation capacity by 126.26 %, but the ductility decreases by 3.34 %. Therefore, the oblique multi-ribs repair method is more effective in improving bearing capacity, stiffness and energy consumption. Orthogonal multi-ribs repair method can be adopted to improve ductility. In addition, multi-ribs repair can provide effective out-of-plane support for the wall plate and reduce the wall plate buckling deformation, among which the oblique multi-ribs repair method is more effective. The use of the birth and death element method in numerical simulation can effectively realize the repair process of multi-ribs. Compared with orthogonal multi-ribs, the stress development of oblique multi-ribs repair is more prominent, and the degree of participation is higher. Adding an orthogonal frame around the oblique multi-ribs can further improve the hysteretic performance of SPSWs and suppress the out-of-plane deformation of the wall plate.为研究薄钢板剪力墙在地震破坏后的修复方法，本文对3个比例尺为1/3的薄钢板剪力墙试件进行了两阶段拟静力试验，对比分析了未修复试件、正交多筋修复试件和斜向多筋修复试件在两次地震作用下的滞回性能。结果表明：经正交多肋修复后，震损单肋结构承载力提高11.46%，初始刚度提高67.08%，耗能能力提高105.12%，延性提高11.14%。经斜肋修复后，震损单肋结构承载力提高22.83%，初始刚度提高88.01%，耗能能力提高126.26%，但延性降低3.34%。因此，斜多肋修复方法在提高承载力、刚度和能耗方面更为有效。可采用正交多筋修补法提高延性。此外，多肋修复可以为墙板提供有效的面外支撑，减少墙板屈曲变形，其中斜向多肋修复方法更为有效。在数值模拟中采用生灭元法可以有效地实现多肋的修复过程。与正交多肋相比，斜向多肋修复的应力发展更为突出，参与程度更高。在斜肋周围加入正交框架可以进一步改善spsw的滞回性能，抑制壁板的面外变形。来源：复合材料力学仿真Composites FEM