【新文速递】2025年11月25日复合材料SCI期刊最新文章

今日更新：International Journal of Solids and Structures 6 篇，Journal of the Mechanics and Physics of Solids 1 篇，Thin-Walled Structures 6 篇International Journal of Solids and StructuresTime and space multiscale modeling of the high cycle fatigue of polymer solids and structuresI. Doghri, M. Haddad, G. Tsilimidos, Y. Ru, M. Lackner, Z. Majordoi:10.1016/j.ijsolstr.2025.113767聚合物固体及结构高周疲劳的时空多尺度建模High cycle fatigue (HCF) of solids and structures made of thermoplastic polymers is predicted with a new time and space multiscale formulation. The microstructure is viewed as being made of a viscoelastic (VE) matrix phase with s mall concentrations of process-induced pores and viscoelastic-viscoplastic (VEVP) damaging weak spots, which have almost no visible influence on the structural response but are responsible eventually for fatigue failure. The structure is first computed as being VE, using a Laplace-Carson based formulation enabling to compute accurate histories of strain and stress fields at a very reduced cost, which is also independent of the number of cycles. Next, the full VEVP solution for any heterogeneous representative volume element (RVE) is computed by coupling time homogenization with space homogenization. The former theory uses fast and slow time scales and asymptotic time expansions, while the latter is based on mean-field homogenization via the incremental-secant model. Coupled time and space homogenization enables to compute complete RVE solution histories at extremely limited cost. The number of cycles to failure at the macroscale is predicted when microscale damage in the weak spots reaches a critical value. The numerical accuracy of the new formulation is verified against reference solutions, and its predictions compared against experimental S-N curves for additively manufactured hollow and notched cylindrical specimens of TPU material, under displacement or force controlled HCF.用一种新的时间和空间多尺度公式预测了热塑性聚合物固体和结构的高周疲劳。微观结构被认为是由粘弹性（VE）基体相组成的，其中含有少量的工艺诱导孔隙和粘弹粘塑性（VEVP）损伤薄弱点，这些薄弱点对结构响应几乎没有明显的影响，但最终会导致疲劳破坏。该结构首先被计算为VE，使用基于拉普拉斯-卡森的公式，能够以非常低的成本计算准确的应变和应力场历史，这也与循环次数无关。接下来，通过耦合时间均匀化和空间均匀化，计算任何异质代表性体积元（RVE）的完整VEVP解。前者使用快、慢时间尺度和渐近时间展开式，而后者则基于增量-割线模型的平均场均匀化。耦合的时间和空间均质化能够以极有限的成本计算完整的RVE解决方案历史。当薄弱点的微尺度损伤达到临界值时，在宏观尺度上预测到失效的循环次数。通过参考解验证了新公式的数值精度，并将其预测结果与增材制造TPU材料空心和缺口圆柱形试样在位移或力控HCF下的实验S-N曲线进行了比较。A coupled thermo-mechanical peridynamic cohesive model for nonlinear failure ana lysis of temperature-dependent material interfaceHeng Zhang, Pizhong Qiaodoi:10.1016/j.ijsolstr.2025.113777温度相关材料界面非线性破坏分析的热-力耦合周动力内聚模型A novel fully-coupled thermo-mechanical peridynamic cohesive model for nonlinear failure an alysis of temperature-dependent material interface is developed, and it is derived from the thermodynamic laws and nonlocal formation of free energy density, including the thermal softening bilinear cohesive law, mixed-mode damage criteria and progressive frictional function. In parallel, the deformation-dependent thermal contact model, associated with the damage scalar, interface displacement, and contact pressure, is also proposed to capture the heat transfer properties of cohesive interface. Five case studies (i.e., a plate with a pressure-dependent interface, thermo-mechanical separation of two cubes, interface mixed-mode debonding, pull-out test with a thermal softening cohesive interface, and bimaterial single edge notched specimens under shear load) are an alyzed, in comparison and validation with the a nalytical solutions and numerical finite element results. The five case studies demonstrate the capabilities of the proposed model in capturing the interactions of heat transfer, mechanical deformation and interface fracture and shedding light on the thermal softening effect of interface nonlinear failure properties. The present model advances the better understanding of thermo-mechanical fracture of temperature-dependent interface.基于热软化双线性黏聚规律、混合模损伤准则和递进摩擦函数，建立了一种适用于温度相关材料界面非线性破坏分析的全耦合热-力周动力黏聚模型。同时，提出了与损伤标量、界面位移和接触压力相关的变形热接触模型，以表征黏合界面的传热特性。分析了具有压力依赖界面的板、两个立方体的热-力分离、界面混合模式剥离、热软化黏结界面拉出试验和剪切载荷下双材料单边缺口试件的5个案例，并与解析解和数值有限元结果进行了对比和验证。五个案例研究表明，所提出的模型在捕捉传热、力学变形和界面断裂的相互作用方面的能力，并揭示了界面非线性破坏特性的热软化效应。该模型有助于更好地理解温度依赖界面的热-力学断裂。Data-enabled configuration-dependent homogenization method for metamaterial structures incorporating boundary effectsDaming Nie, Shuo Li, Yu Zhang, Li Lidoi:10.1016/j.ijsolstr.2025.113766结合边界效应的超材料结构的数据支持构型依赖均质化方法Pronounced size-dependent effective structural modulus has been experimentally observed in triply periodic minimal surface (TPMS) metamaterial structures. This size-dependent mechanical behavior aligns with the nonlocal strain gradient elasticity, which captures such size dependence by introducing the dimensional intrinsic parameters. This study aims to develop a data-enabled nonlocal strain-gradient homogenization (NSGH) method for efficient and accurate prediction and characterization of the performance of TPMS metamaterial structures. The physically consistent NSGH model was developed with the help of the lumped element model firstly. Then, the intrinsic parameters in the NSGH model can be rapidly calibrated online through the offline dataset constructed by the Gaussian Process Regression (GPR) method. The data-enabled NSGH method demonstrates accurate predictive capability for the size-dependent effective structural modulus of metamaterial structures, while maintaining efficiency. Finally, the excellent agreement between the NSGH method and experimental measurements provides compelling evidence for both the theoretical soundness and practical utility of the developed NSGH method in metamaterial structure performance prediction.在三周期最小表面（TPMS）超材料结构中观察到明显的尺寸相关有效结构模量。这种尺寸依赖的力学行为与非局部应变梯度弹性一致，通过引入尺寸固有参数来捕获这种尺寸依赖。本研究旨在开发一种数据支持的非局部应变梯度均质化（NSGH）方法，用于高效准确地预测和表征TPMS超材料结构的性能。首先利用集总元模型建立了物理一致性的NSGH模型。然后，通过高斯过程回归（GPR）方法构建的离线数据集，可以快速在线校准NSGH模型中的固有参数。数据支持的NSGH方法在保持效率的同时，对超材料结构的尺寸相关有效结构模量具有准确的预测能力。最后，NSGH方法与实验测量结果的良好一致性为该方法在超材料结构性能预测中的理论合理性和实际应用提供了强有力的证据。Experimental investigation on the dynamic shear rupture of a novel high-strength and high-toughness steel subjected to high strain rate loadingYifei Zhu, Xiyue Liu, Shulin Ren, Songyuan Liu, Zhigang Tao, Manchao He, Changyi Yudoi:10.1016/j.ijsolstr.2025.113771一种新型高强高韧性钢在高应变率载荷作用下的动剪切断裂试验研究Given the frequent occurrence of dynamic disasters in geotechnical engineering, there is an increasing demand for new materials capable of controlling such disasters. NPR steel (Negative Poisson’s Ratio steel), a novel high-strength and high-toughness steel, is indispensable in mitigating geotechnical engineering disasters. However, limited studies have examined the dynamic properties of NPR steel, particularly its dynamic shear characteristics. Therefore, this study conducts Split Hopkinson pressure bar dynamic shear tests on this material, with shear strain rates ranging from 3500 to 18,000 s−1. Comparing NPR steel with Q235, Q355, Q690, and Q960 steel indicates that NPR steel withstands higher and faster impact loads and absorbs more energy during damage. In addition, on the basis of the existing high strain rate tensile constitutive model, the parameters of the Johnson-Cook model are modified, which is more suitable for dynamic shear. The finite element an alysis (FEA) results based on the modified J-C model were validated against experimental data by comparing strain signal curves, pulse propagation characteristics in the trans mitter bar, and distributions of Von Mises stress and equivalent plastic strain within specimens. This comparison confirmed the reliability of laboratory tests and demonstrated that the modified J-C parameters accurately simulate shear test behavior.由于岩土工程中动力灾害的频繁发生，对控制动力灾害的新型材料的需求日益增加。负泊松比钢是一种新型的高强度、高韧性钢，是缓解岩土工程灾害不可缺少的材料。然而，研究NPR钢的动态性能，特别是其动态剪切特性的研究有限。因此，本研究对该材料进行了劈裂霍普金森压杆动剪试验，剪切应变率为3500 ~ 18000 s−1。NPR钢与Q235、Q355、Q690和Q960钢的对比表明，NPR钢能承受更高更快的冲击载荷，在损伤过程中吸收更多的能量。此外，在现有高应变率拉伸本构模型的基础上，对Johnson-Cook模型的参数进行了修正，使其更适合动剪切。通过对比应变信号曲线、脉冲在发射杆内的传播特性以及试件内Von Mises应力和等效塑性应变的分布，验证了基于修正J-C模型的有限元分析结果与实验数据的一致性。通过对比验证了室内试验的可靠性，表明修正后的J-C参数能较好地模拟剪切试验行为。Automating the failure mode based partition of the failure envelope for tubes using unsupervised machine learningRuoyu Sun, Nilesh D. Mankame, Girish Krishnandoi:10.1016/j.ijsolstr.2025.113772使用无监督机器学习对管道的故障包络进行基于故障模式的自动划分Failure mode-based partitioning of the failure envelope of a structure can make the design process for optimal structures more efficient. However, partitioning the failure envelope is challenging for structures whose failure modes are not known a priori. We present a two- step algorithm that automates the failure mode-based partition of the failure envelope for a structure and demonstrate its capability using tubes with a circular cross section as canonical structural elements. The first step of the algorithm employs non-intrusive finite element an alyses (FEA) to generate the structure’s failure envelope. The von Mises stress field at the onset of failure encapsulates critical information about the failure mode. We exploit this observation by using the stress field output by the first step of the algorithm as input for the second step. The second step of the algorithm uses clustering, an unsupervised machine learning technique, to partition the failure envelope based on the von Mises stress field at the onset of failure. We use the algorithm to generate partitions of the failure envelope for tubes with circular cross sections subjected to pure bending and three-point bending. In the pure bending case, where an alytical results are available in the literature, the results from our algorithm show good agreement with an alytical results. We provide practical guidelines for choosing suitable values for the various parameters and hyperparameters in the algorithm.基于失效模式的结构失效包络划分可以提高结构优化设计的效率。然而，对于失效模式未知的结构，划分失效包络层是一项挑战。我们提出了一种基于失效模式的结构失效包络自动划分的两步算法，并以具有圆形截面的管作为典型结构单元来证明其能力。算法的第一步采用非侵入式有限元分析（FEA）生成结构的失效包络线。失效开始时的冯·米塞斯应力场包含了关于失效模式的关键信息。我们通过使用算法第一步的应力场输出作为第二步的输入来利用这一观察结果。该算法的第二步使用聚类，一种无监督机器学习技术，在故障开始时基于von Mises应力场划分故障包络。我们使用该算法生成了纯弯曲和三点弯曲的圆形截面管的失效包络线分区。在文献中已有分析结果的纯弯曲情况下，本文算法的结果与分析结果吻合良好。我们为算法中的各种参数和超参数选择合适的值提供了实用的指导。A microstructure-informed hyperelastic model for CNT-based polymer nanocomposites under large deformationsMatteo Pelliciari, Stefano Sirotti, Angelo Marcello Tarantinodoi:10.1016/j.ijsolstr.2025.113779大变形下碳纳米管基聚合物纳米复合材料的微结构超弹性模型Modeling the mechanical response of carbon nanotube (CNT)-reinforced polymer nanocomposites (PNCs) under large deformations remains an open and complex challenge. Microstructural phenomena such as the formation of CNT agglomerates and the progressive detachment of CNTs from the polymer matrix significantly influence the macroscopic mechanical behavior, particularly in the nonlinear regime. These effects are further complicated by variability introduced during fabrication, which can significantly affect both internal morphology and mechanical performance. Despite progress in the field, a comprehensive hyperelastic model capable of capturing these phenomena and linking them to continuum-level response is still lacking. This work presents a physically motivated hyperelastic model informed by scanning electron microscopy (SEM) observations. The growth of agglomerates and the local increase in CNT concentration are incorporated using functions derived from underlying statistical distributions. The reinforcement contributions of CNTs in agglomerated and non-agglomerated regions are described by strain energy functions reflecting microstructural observations. Interfacial detachment is captured within the framework of continuous softening hyperelasticity, introducing critical strain invariants to define the onset of debonding. All model parameters retain a clear physical interpretation and can be directly estimated from SEM imaging, making the model fully predictive without requiring mechanical test data. To demonstrate practical applicability, the model is implemented in a finite element framework and validated against experimental simple tension and bending tests. Additionally, a simplified version of the model is proposed for cases where microstructural data are unavailable, following a more classical phenomenological approach in nonlinear mechanics. This formulation requires only stress–strain data for calibration and is shown to accurately reproduce experimental results from three independent datasets, confirming the effectiveness and versatility of the proposed approach.模拟大变形下碳纳米管增强聚合物纳米复合材料（pnc）的力学响应仍然是一个开放和复杂的挑战。微观结构现象，如碳纳米管团聚体的形成和碳纳米管从聚合物基体上的逐渐脱离，显著影响宏观力学行为，特别是在非线性状态下。这些影响由于制造过程中引入的可变性而进一步复杂化，这可能会显著影响内部形态和机械性能。尽管该领域取得了进展，但仍然缺乏能够捕捉这些现象并将其与连续级响应联系起来的综合超弹性模型。这项工作提出了一个物理驱动的超弹性模型，通过扫描电子显微镜（SEM）观察。团块的增长和碳纳米管浓度的局部增加使用从基础统计分布中导出的函数进行合并。CNTs在聚集和非聚集区域的增强作用可以通过反映微观结构观察的应变能函数来描述。在连续软化超弹性的框架内捕获界面脱离，引入临界应变不变量来定义脱粘的开始。所有模型参数都保留了清晰的物理解释，可以直接从SEM成像中进行估计，使模型完全具有预测性，而不需要力学测试数据。为了证明该模型的实用性，在有限元框架中实现了该模型，并通过简单的拉伸和弯曲试验进行了验证。此外，在微观结构数据不可用的情况下，根据非线性力学中更经典的现象学方法，提出了模型的简化版本。该公式只需要应力应变数据进行校准，并且可以准确地再现来自三个独立数据集的实验结果，证实了所提出方法的有效性和通用性。Journal of the Mechanics and Physics of SolidsStress dependence of the chemical potential of lithium in a silicon electrodeAnh Tuan Le, Xavier Bruant, Ngoc Tram Phung, François Ozanam, Michel Rosso, Laurent Guindoi:10.1016/j.jmps.2025.106421硅电极中锂化学势的应力依赖性We report operando measurements and concurrent modeling of the stress dependence of the chemical potential of lithium in a silicon electrode. An experimental study is carried out on hydrogenated amorphous silicon thin films in which the electrode stress state is modified operando during electrochemical lithiation and delithiation by applying an external mechanical load. During galvanostatic cycling, the electrode is periodically subjected to a tensile strain, inducing stress variations that are reflected in voltage changes. The measured stress-induced voltage changes are interpreted using a well-established chemomechanical model of lithium insertion in silicon. Comparison of voltage measurements with model predictions allows us to determine the concentration-dependent Young’s modulus (from 29 GPa to 26 GPa with increasing lithium content) and some of the viscoplastic parameters of lithiated silicon. The calibrated model shows good predictive capability when applied to lithiation cycles performed at a C-rate different from that of the calibration cycle. However, it shows limitations in explaining voltage changes under delithiation. These results show that thermodynamically-consistent chemomechanical models of lithiation not only adequately describe the effect of lithium insertion and deinsertion on stress, as already shown in the literature, but also capture the reverse effect of stress on lithium chemical potential in silicon. In this respect, this work opens up new perspectives for the quantitative validation and calibration of existing diffusion-deformation theories, notably by highlighting their possible limitations.我们报告了锂在硅电极中化学势的应力依赖性的operando测量和并发建模。在外加机械载荷的作用下，对氢化非晶硅薄膜进行了电化学锂化和电解过程中电极应力状态改变的实验研究。在恒流循环期间，电极周期性地受到拉伸应变，引起应力变化，反映在电压变化中。测量应力引起的电压变化是用一个完善的锂插入硅的化学力学模型来解释的。电压测量值与模型预测值的比较使我们能够确定与浓度相关的杨氏模量（随着锂含量的增加，从29 GPa到26 GPa）和锂化硅的一些粘塑性参数。当校正后的模型应用于不同于校正周期的碳速率的锂化循环时，显示出良好的预测能力。然而，它在解释衰减作用下的电压变化时显示出局限性。这些结果表明，热力学一致的锂化化学力学模型不仅充分描述了锂插入和去插入对应力的影响，正如文献所示，而且还捕获了应力对硅中锂化学势的反向影响。在这方面，这项工作为现有扩散变形理论的定量验证和校准开辟了新的视角，特别是通过强调它们可能的局限性。Thin-Walled StructuresExtracting flexural and torsional mode shapes of bridges using a 3D two-axle passing vehicle with experimental validationsJunyong Zhou, Binbin Du, Jiang Yi, Xiancai Yuan, Chudong Pan, Xuan Kongdoi:10.1016/j.tws.2025.114256利用三维双轴车辆提取桥梁的弯扭模态振型，并进行了实验验证The vehicle scanning method (VS M) has been widely explored for its efficiency, mobility, cost-effectiveness, and non-interruption to traffic. However, most existing studies are based on two-dimensional vehicle-bridge interaction (2D VBI) theory and lack experimental validation, limiting their applicability to real-world 3D scenarios. This study presents an alytical and experimental investigations using a 3D two-axle passing vehicle to identify frequencies and spatial mode shapes of a thin-walled box-girder bridge. A novel multi-peak-spectra idealized filter combined with the continuous wavelet transform is developed to extract frequencies and reconstruct spatial mode shapes from residual wheel contact-point (CP) responses derived from vehicle accelerations. Finite element simulations and laboratory tests validate the theoretical framework and proposed approach. Numerical results show that CP responses of the 3D two-axle vehicle capture both flexural and torsional modes, while residual CP responses effectively mitigate the influence of vehicle self-vibrations and road roughness when VBI effects are moderate. Under significant roughness, where VBI effects become prominent, frequency identification remains reliable, though mode shape reconstruction is less accurate. Laboratory tests further confirm accurate identification of the first flexural and torsional frequencies, with the corresponding reconstructed spatial mode shapes showing satisfactory precision.车辆扫描方法（VS M）以其高效、机动、经济、不中断交通等优点得到了广泛的探索。然而，现有的研究大多基于二维车桥相互作用（2D VBI）理论，缺乏实验验证，限制了其在现实三维场景中的适用性。本文采用三维双轴通行车辆对薄壁箱梁桥的频率和空间模态振型进行了分析和实验研究。提出了一种结合连续小波变换的多峰谱理想滤波器，从车辆加速度产生的剩余车轮接触点（CP）响应中提取频率并重建空间模态振型。有限元仿真和实验室试验验证了理论框架和提出的方法。数值计算结果表明，三维双轴车辆的CP响应捕获了弯曲和扭转两种模式，而当VBI效应适度时，剩余CP响应可以有效地缓解车辆自振动和路面粗糙度的影响。在显著的粗糙度下，VBI效应变得突出，频率识别仍然可靠，尽管模态振型重建不太准确。实验室试验进一步证实了第一弯曲和扭转频率的准确识别，相应的重构空间模态振型显示出令人满意的精度。Effect of adhesive interface on the ballistic performance for double-layered aluminum plates impacted by blunt projectileYi Shen, Tianbao Ma, Jianqiao Lidoi:10.1016/j.tws.2025.114259粘接界面对钝弹冲击双层铝板弹道性能的影响The double-layered metallic structures are widely used in various engineering designs due to their excellent impact resistance and lightweight. In this paper, the effects of thickness configuration and interface adhesive on the impact resistances for double-layered aluminum plates against blunt projectiles were experimental and numerical investigated. Above all, ballistic experiments were conducted using a gas gun to investigate the impact resistance of monolithic plates, non-bonded and adhesively bonded double-layered plates with identical total thickness. Based on experimental results, the effects of thickness configurations and adhesive interfaces on impact resistances were obtained. Subsequently, numerical simulations were performed, and their results were validated against experimental data, confirming the reliability of our numerical methodology. Leveraging this validated approach, the out-of-plane deformation features, failure modes, energy dissipation modes, and adhesive debonding modes were an alyzed in detail. Moreover, the influences of adhesive layer thickness, plate thickness, and super-velocity impact on the impact resistances of plates against blunt projectiles were studied. The results indicated that an adhesive layer significantly suppressed deformation disparity between front and rear plates. Moreover, the adhesive application completely altered the evolution trends of both ballistic limit velocities and energy dissipation mode along the thickness configurations. Crucially, due to stress concentration at the interface, both bonded and non-bonded double-layered plates exhibited inferior impact resistances against blunt projectiles compared to monolithic plates with the same total thickness.双层金属结构由于其优异的抗冲击性能和轻质性能，在各种工程设计中得到了广泛的应用。本文采用实验和数值方法研究了厚度结构和界面胶粘剂对双层铝板抗钝性弹丸冲击性能的影响。首先，利用气 枪进行了弹道试验，研究了总厚度相同的单层板、无粘结双层板和粘接双层板的抗冲击性能。基于实验结果，得到了厚度配置和粘结界面对抗冲击性能的影响。随后进行了数值模拟，并与实验数据进行了验证，验证了数值方法的可靠性。利用这一验证方法，详细分析了面外变形特征、破坏模式、能量耗散模式和粘结脱粘模式。此外，还研究了粘接层厚度、板厚和超高速冲击对板抗钝器冲击性能的影响。结果表明，粘接层对前后板变形差有明显的抑制作用。此外，胶粘剂的应用完全改变了弹道极限速度和能量耗散模式沿厚度构型的演变趋势。至关重要的是，由于界面处的应力集中，与总厚度相同的单片板相比，粘合和非粘合双层板对钝器弹丸的抗冲击性较差。A novel honeycomb tube-combined metamaterial by a sequential arrangement strategy with designable dual-stage mechanical propertiesYang Zhou, Han Wu, Xiangqiang Zhong, Qiang Gaodoi:10.1016/j.tws.2025.114262一种具有可设计双级力学性能的有序排列的新型蜂窝管组合超材料Mechanical metamaterials with dual-stage crushing characteristics have received enthusiastic attention, while the deformation mechanis ms involved in existing research are still limited, and the two-stage designability still needs to be enhanced. This work proposes a novel honeycomb tube-combined metamaterial (HTCM) via the sequential arrangement of a Re-entrant honeycomb and a thin-walled tube, which is expected to obtain an enhancing energy absorption and two-stage designability. The crushing properties of the HTCM are systematically studied by numerical simulations and experimental methods. Results show that the HTCM exhibits distinct dual-stage stress plateau characteristics driven by sequential deformations, where the first is wall bending deformation, and the second is plastic squeezing and wrinkling of tubes. The second plateau stress with the value of 0.619 MPa is significantly higher than that of the first plateau with the value of 0.096 MPa. By adjusting the height ratio of the two involved parts, the transition point of the dual stages can be an alytically determined within the range of about 0.2-0.8. Increasing the ratio of the tube can significantly improve the specific energy absorption (SEA), with an increasing ratio of 243.5%. The wall thicknesses of the two parts can independently regulate the first and second plateau stresses respectively. A comparison an alysis further shows that the HTCM can achieve a higher SEA value, a wider transition point and a wider ratio of dual plateaus, compared with existing metamaterials. Overall, this work provides a new paradigm for the design of mechanical metamaterials and the tuning strategy of the dual-stage mechanical properties.具有双阶段破碎特性的机械超材料受到了人们的热烈关注，但现有研究涉及的变形机制仍然有限，两阶段可设计性仍有待提高。本研究提出了一种新的蜂窝管组合超材料（HTCM），该材料通过再入式蜂窝和薄壁管的顺序排列，有望获得增强的能量吸收和两阶段可设计性。采用数值模拟和实验相结合的方法，系统地研究了HTCM的破碎性能。结果表明：在连续变形的驱动下，HTCM表现出明显的双阶段应力平台特征，第一阶段是管壁弯曲变形，第二阶段是管材的塑性挤压和起皱；第2个高原应力值为0.619 MPa，显著高于第1个高原应力值0.096 MPa。通过调整两个相关部分的高度比，可以在0.2 ~ 0.8的范围内解析确定双级的过渡点。增大管径比可显著提高比能吸收（SEA），增加比能达到243.5%。两部分的壁厚可以分别独立调节第一和第二平台应力。对比分析进一步表明，与现有的超材料相比，HTCM可以实现更高的SEA值、更宽的过渡点和更宽的双平台比。总之，本研究为机械超材料的设计和双级力学性能的调整策略提供了新的范式。Data-driven optimization of fiber orientation using physics-enhanced machine learning and substructuring methodXuan Wang, Weiqi Ji, Xiang Chen, Zeng Mengdoi:10.1016/j.tws.2025.114264使用物理增强机器学习和子结构方法的数据驱动纤维定向优化This paper introduces a novel data-driven method for optimizing spatially varying fiber orientation in composite structures with enhanced computational efficiency. The fiber angle distribution is parameterized using radial basis functions (RBFs), which provide a flexible and continuous representation of the orientation field. To ensure physical realizability, the divergence constraint for controlling gap/overlap and the curvature constraint for controlling fiber's bending are explicitly incorporated into the optimization formulation. To address computational challenges, a model reduction technique based on a linear-assumption-enhanced substructuring method is utilized. Furthermore, to accelerate the internal displacement recovery and substructure condensation processes within the substructuring framework, an offline-trained physics-enhanced machine learning (ML) model is introduced. This pre-trained ML model enables instantaneous calculation of substructure shape functions based on the element angles, making it applicable to structural optimization under arbitrary boundary conditions without the need for additional data training. Numerical examples validate the effectiveness of the proposed approach, confirming its ability to generate manufacturable fiber orientation designs while significantly reducing computational overhead compared to conventional methods.本文介绍了一种新的数据驱动方法，用于优化复合材料结构中纤维取向的空间变化，提高了计算效率。利用径向基函数（rbf）对纤维的角度分布进行了参数化，提供了一种灵活、连续的方向场表示。为了保证物理可实现性，将控制间隙/重叠的发散约束和控制纤维弯曲的曲率约束明确纳入优化公式。为了解决计算难题，采用了基于线性假设增强子结构方法的模型简化技术。此外，为了加速子结构框架内的内部位移恢复和子结构凝聚过程，引入了离线训练的物理增强机器学习（ML）模型。这种预训练的ML模型可以基于元素角度即时计算子结构形状函数，使其适用于任意边界条件下的结构优化，而无需额外的数据训练。数值算例验证了该方法的有效性，证实了该方法能够生成可制造的纤维取向设计，同时与传统方法相比显著减少了计算开销。The Resonant Actuation and Optimization Design of Piezoelectrically Actuated Bistable Composite LaminatesYuting liu, Ke Huang, Jiaying Zhangdoi:10.1016/j.tws.2025.114265压电驱动双稳态复合材料层合板的谐振驱动及优化设计Asymmetric cross-ply laminates exhibit two stable configurations due to thermal residual stresses developed during or after curing and cooling process, which may cause them to bend in both directions. Bistable laminates, such as asymmetric cross-ply laminates, exhibit excellent response speed and load-bearing capacity, and strong nonlinear and negative stiffness characteristics during deformation. These characteristics make bistable laminates highly promising for wide applications in morphing wings, soft actuators, energy harvesting and electronic devices. Especially in the aerospace field, morphing wings composed of bistable laminates can improve flight performance, enhance control, and reduce drag and flutter. To overcome the shortcomings of traditional discrete rigid deformation structures and promote the development of adaptive structures to lightweight, self-driven and high-performance systems, this paper integrates Macro Fiber Composite (MFC) into bistable laminates to replace the traditional exciter for actuation. An an alytical model is derived using Hamilton’s principle and the Rayleigh-Ritz method, by comparing the calculation results of commonly used fourth-order and sixth-order dynamic a nalytical models with ABAQUS finite element shell models to determine systematic parameter and stable configurations. Summarizing the advantages of the existing dynamic actuation, this paper proposes resonant actuation which can change the structure to ensure that the inertia forces and stiffness forces cancel each other over the desired actuation period. Based on the strong nonlinear characteristics of bistable laminates, the method for determining the critical actuation load is systematically summarized for the first time. In order to find bistable laminates with low energy actuation and large deformation, taking the size of the composite laminates as a variable to establish a global mathematical model of critical actuation load by Response Surface Methodology (RS M). Taking the actuation voltage required for one unit deflection as the objective function, the non-dominated sorting genetic algorithm-Ⅱ (NSGA-Ⅱ) is used to find the Pareto front, determining the best operating specimens for experimental verification. This approach lays a theoretical foundation for exploring low energy consumption paths and global optimization of MFC actuation, paving the way for the large-scale application of morphing wings.由于在固化和冷却过程中或之后产生的热残余应力，不对称交叉层合板呈现出两种稳定的结构，这可能导致它们在两个方向上弯曲。非对称交叉层合板等双稳态层合板在变形过程中具有良好的响应速度和承载能力，且具有较强的非线性和负刚度特性。这些特性使得双稳态层压板在变形翼、软致动器、能量收集和电子设备等方面具有广泛的应用前景。特别是在航空航天领域，由双稳态层压板组成的变形机翼可以提高飞行性能，增强控制，减少阻力和颤振。为了克服传统离散刚性变形结构的缺点，促进自适应结构向轻量化、自驱动和高性能系统发展，本文将宏纤维复合材料（Macro Fiber Composite， MFC）集成到双稳态层压板中，取代传统的激励器进行驱动。利用Hamilton原理和Rayleigh-Ritz方法，将常用的四阶和六阶动力分析模型的计算结果与ABAQUS有限元壳模型进行比较，建立了解析模型，确定了系统参数和稳定构型。在总结现有动态驱动的优点的基础上，提出了共振驱动，通过改变结构，使惯性力和刚度在预期的驱动周期内相互抵消。针对双稳态层压板的强非线性特性，首次系统地总结了临界驱动载荷的确定方法。为了寻找驱动能量低、变形大的复合材料层合板，以层合板尺寸为变量，采用响应面法建立了临界驱动载荷的全局数学模型。以单位挠度所需的驱动电压为目标函数，采用非支配排序遗传算法Ⅱ（NSGA-Ⅱ）寻找Pareto前沿，确定最佳运行试件进行实验验证。该方法为探索MFC驱动的低能耗路径和全局优化奠定了理论基础，为变形翼的大规模应用铺平了道路。Effects of the ballast water state on the dynamic response of cabin structure subjected to underwater explosionYanwu Chen, Cheng Wang, Yuanxiang Sun, Tianzhao Wangdoi:10.1016/j.tws.2025.114266压载水状态对水下爆炸作用下舱室结构动力响应的影响This paper investigates the dynamic response of cabin structure under different ballast states in different underwater explosion (UNDEX) scenarios, aiming to provide references for enhancing the damage capability of underwater weapons and the protective design of ship structures. A 1: 3 scale model of the midship cabin of a certain type of frigate was used as the research object. Far-field and close-in UNDEX experiments were conducted under different ballast states of the cabin structure. A finite element model of the close-in UNDEX was established and its validity was verified, and the evolution of the internal flow field loads and the structural damage process were obtained. The results show that under far-field explosion loads, the cabin is in the elastic response stage, and the peak strain, spectral displacement, and spectral velocity are the largest when it is in full load. Under close-in UNDEX loads, the ballast state first affects the response form of the cabin’s outer plate, and then determines the trans mission and evolution of the loads in the internal flow field. When the cabin is in full load, the inner plate is subjected to trans mitted shock wave load and compression load, and the damage degree of the cabin is the s mallest. When the cabin is in half load, the inner plate is subjected to water impact load and compression load, and the damage degree is moderate. When the cabin is in empty load, the inner plate is mainly subjected to the pushing force of the petal crevasse of the outer plate, and the damage degree is the severest.本文研究了不同压舱状态下船舶舱室结构在不同水下爆炸场景下的动力响应，旨在为提高水下武器的毁伤能力和船舶结构防护设计提供参考。以某型护卫舰舰中舱1:1比例模型为研究对象。在舱体结构不同压载状态下进行了远场和近场UNDEX实验。建立了近端UNDEX有限元模型，并对其有效性进行了验证，得到了内部流场载荷的演化规律和结构损伤过程。结果表明：在远场爆炸载荷作用下，座舱处于弹性响应阶段，满载时峰值应变、谱位移和谱速度最大；在近程UNDEX载荷作用下，压载状态首先影响客舱外板的响应形式，然后决定载荷在内部流场中的传递和演化。客舱满载时，内板承受传递冲击波载荷和压缩载荷，客舱损伤程度最小。客舱半载时，内板承受水冲击载荷和压缩载荷，损伤程度适中。当客舱处于空载状态时，内板主要受到外板花瓣裂缝的推力，损伤程度最严重。来源：复合材料力学仿真Composites FEM