【新文速递】2026年1月1日固体力学SCI期刊最新文章

今日更新：International Journal of Solids and Structures 1 篇，Mechanics of Materials 1 篇，Thin-Walled Structures 5 篇International Journal of Solids and StructuresIntegrated nonlinear biomechanical modeling, topology optimization, and LPBF process simulation for customized mandibular fracture fixation platesE.D.M. Santanna, C.T.M. Anflor, F.F.A.O. Nascimentodoi:10.1016/j.ijsolstr.2025.113776集成非线性生物力学建模、拓扑优化和LPBF过程仿真定制下颌骨骨折固定钢板The main goal of this work relies on developing an optimal topology of a plate used in the fracture symphysis stabilization. The present numerical model was validated in a previous study. In that work, the mandibular structure was modeled with orthotropic mechanical properties, adopting a sub-region (multi-region) approach to account for the specificities of each anatomical part. Topology optimization was employed to minimize structural compliance and reduce the total mass of the plate, utilizing the Solid Isotropic Material with Penalization (SIMP) method while considering the anisotropic behavior of the Ti6Al4V alloy resulting from the additive manufacturing process. The resulting optimized geometry exhibits a non-uniform material distribution that compensates for the load path induced by the asymmetric facial distribution. Finite element a nalysis incorporated a detailed representation of the bone-implant-screw assembly, in which screws were modeled as cylindrical components with linear contact conditions at the bone-screw interface. Nonlinear contact formulations were applied to both the bone-plate and bone-bone fracture interfaces to accurately capture interfacial load transfer. In addition to the patient-specific optimized plate, the present study also included the biomechanical assess ment of standard commercial fixation systems, including both single and double plate configurations, allowing a performance comparison. Additionally, a thermo-mechanical simulation of the Laser Powder Bed Fusion (LPBF) manufacturing process was conducted to evaluate residual stress, geometric distortion, and optimal build orientation, ensuring that the final implant satisfies both mechanical and manufacturing constraints. The results demonstrate that the optimized plate outperforms conventional commercial designs in terms of stiffness and load distribution, while achieving a significant mass reduction. This underscores the importance of integrating topology optimization with process-aware design strategies in the development of patient-specific implants.这项工作的主要目标是开发用于骨折联合稳定的钢板的最佳拓扑结构。本文的数值模型在前人的研究中得到了验证。在这项工作中，下颌结构采用正交异性力学特性建模，采用子区域（多区域）方法来解释每个解剖部分的特异性。在考虑增材制造过程中Ti6Al4V合金的各向异性行为的同时，利用固体各向同性材料惩罚法（SIMP）进行拓扑优化，以最小化结构柔度并减小板的总质量。所得到的优化几何结构呈现出非均匀的材料分布，以补偿由不对称表面分布引起的负载路径。有限元分析结合了骨-种植体-螺钉组合的详细表示，其中螺钉被建模为在骨-螺钉界面处具有线性接触条件的圆柱形部件。将非线性接触公式应用于骨-板和骨-骨断裂界面，以准确捕捉界面载荷传递。除了针对患者的优化钢板外，本研究还包括标准商业固定系统的生物力学评估，包括单钢板和双钢板配置，以便进行性能比较。此外，对激光粉末床熔合（LPBF）制造过程进行了热力学模拟，以评估残余应力、几何畸变和最佳构建方向，确保最终植入物满足机械和制造约束。结果表明，优化后的板在刚度和载荷分布方面优于传统的商业设计，同时实现了显著的质量降低。这强调了将拓扑优化与过程感知设计策略集成在患者特定植入物开发中的重要性。Mechanics of MaterialsConstitutive modeling of the elastoplastic and fatigue behaviors of gradient-nanostructured 316L stainless steels with hierarchical structuresLinli Zhu, Kaiyue Fu, Zizheng Guo, Bin Gan, Jitang Fan, Ligang Sun, Xiaogui Wangdoi:10.1016/j.mechmat.2025.105550梯度纳米结构层次化316L不锈钢弹塑性和疲劳性能的本构建模The gradient nanostructured metallic materials possess the excellent mechanical properties, including the high strength, good elongation and fatigue performance. In this work, a microstructure and mechanis m-based constitutive model is established to explore the strength-ductility relation and fatigue properties of the gradient nanostructured 316L stainless steel (316LSS) through considering the various microstructure distributions. Inspired by the experimental observation of distinguish distribution of nanograined austenite and martensite phase, nanotwinned austenite grains and coarse grains, the micromechanical constitutive model is developed to describe the axial tensile deformation behaviors of the gradient-nanostructured 316SS, involving the flow stress for different phases and the contribution of microcracks on plastic deformation. The simulation results demonstrate that the proposed constitutive model enables to describe the experimental results successfully, including the yield strength, strain hardening and ductility. Additionally, with considering the gradient distribution evolution of microstructures and the damage evolution during cyclic deformation behavior, the fatigue constitutive model for gradient nanostructured metals is developed to describe the uniaxial tensile cycle characteristics of gradient nanostructured 316LSS. The numerical results show that the strain-controlled cyclic deformation behavior of gradient nanostructured stainless steel can be well described, including the cyclic softening and secondary hardening behaviors. The proposed fatigue constitutive model is also applied to forecast the fatigue behavior of the various amplitudes of the stress and the strain, and the various distribution of the fine-grained martensitic phase, nanotwinned austenite grains and coarse grains. These findings could provide the theoretical basis for regulating the strength-ductility relation and fatigue properties of gradient nanostructured metals.梯度纳米结构金属材料具有优异的力学性能，包括高强度、良好的延伸率和疲劳性能。本文建立了基于微观组织和力学的梯度纳米结构316L不锈钢（316LSS）的本构模型，在考虑不同微观组织分布的基础上，探讨了梯度纳米结构316L不锈钢（316LSS）的强度-塑性关系和疲劳性能。基于对纳米奥氏体与马氏体相、纳米孪晶奥氏体晶粒与粗晶的区分分布的实验观察，建立了梯度纳米结构316SS轴向拉伸变形微观力学本构模型，包括不同相的流变应力和微裂纹对塑性变形的贡献。仿真结果表明，所提出的本构模型能够较好地描述试验结果，包括屈服强度、应变硬化和延性。此外，考虑到梯度组织的梯度分布演化和循环变形过程中的损伤演化，建立了梯度纳米结构金属的疲劳本构模型来描述梯度纳米结构316LSS的单轴拉伸循环特性。数值结果表明，梯度纳米结构不锈钢的应变控制循环变形行为可以很好地描述，包括循环软化和二次硬化行为。提出的疲劳本构模型还用于预测不同应力应变幅值下的疲劳行为，以及细晶马氏体相、纳米孪晶奥氏体晶粒和粗晶的不同分布。研究结果可为调控梯度纳米结构金属的强度-延性关系和疲劳性能提供理论依据。Thin-Walled StructuresNonlinear combined vibration modeling and an alysis of honeycomb-filled corrugated core cylindrical shells considering thermal effectsBocheng Dong, Rui Zhao, Zhenqian Liu, Lihao Zhang, Kaiping Yu, Jinze Lidoi:10.1016/j.tws.2025.114257考虑热效应的蜂窝状波纹芯圆柱壳非线性组合振动建模与分析The present study develops an ana lytical model to obtain the static mechanical properties and nonlinear vibration behaviors of an emerging composite core cylindrical shell with promising application prospects in engineering components, where the object is constituted by a honeycomb-filled corrugated core and gradient-distributed composite supporting and covering skins. Explicit calculation expressions of the equivalent macro-mechanical properties of the core and skin are first achieved by employing the modified Halpin-Tsai approach and macroscopic and microscopic strain energy density invariance criterion, and energy computation formulas for the overall structure are derived based on the first-order shear deformation theory and energy methods, which take the von Kármán nonlinear terms into account, with Rayleigh dissipation function, thermal strain energy and the external work generated by the multi-harmonic external loads being characterized. The nonlinear dynamic equations of the system are determined by the Euler-Lagrange routine, while the Galerkin discretization and static condensation techniques are used to reconstruct the mechanics equation for the reduction of the degrees of freedom. The solution procedures regarding the linear and nonlinear vibration behaviors are proposed by eigen-parameters and the multiscale approach, which incorporate the intrinsic frequency, mode shapes, history responses, amplitude-frequency relation, and phase characteristics. The model outcomes are validated by comparison a nalyses, which in turn elucidate the external manifestations and internal mechanis ms of the time-domain course response, amplitude-frequency curves, and phase trajectories triggered by several combined resonance occasions, with the discrepancies in these standards being revealed. The influencing rules and underlying physical causes of critical conformation variables on the multi-harmonic combination resonance behaviors are disclosed, and some proposals conducive to enhancing the structural dynamics capabilities are reported.本文建立了一种新兴的、在工程部件中具有应用前景的复合材料芯柱壳的静力性能和非线性振动特性的解析模型，该壳体由蜂窝填充的波纹芯和梯度分布的复合材料支撑和覆盖表皮构成。采用改进的Halpin-Tsai方法和宏观和微观应变能密度不变性准则，首先获得了芯层和表皮层等效宏观力学性能的显式计算表达式，并基于一阶剪切变形理论和考虑von Kármán非线性项的能量方法，推导了整体结构的能量计算公式，并考虑了Rayleigh耗散函数；研究了多谐外载荷产生的热应变能和外功。采用欧拉-拉格朗日例程确定系统的非线性动力学方程，利用伽辽金离散化和静态凝聚技术重构系统的力学方程，降低了系统的自由度。采用本征参数法和多尺度法，结合固有频率、模态振型、历史响应、幅频关系和相位特性，提出了线性和非线性振动特性的求解方法。通过对比分析对模型结果进行了验证，进而阐明了几种组合共振场合触发的时域过程响应、幅频曲线和相位轨迹的外在表现和内在机制，揭示了这些标准之间的差异。揭示了关键构象变量对多谐波组合共振行为的影响规律及其物理原因，并提出了一些有助于提高结构动力学能力的建议。A Simplified Control Volume-Based Numerical Method for Fire-Induced Collapse of Air-Supported Membrane StructuresYaning Zhang, Ying Sun, Tengfei Wang, Yang Yu, Qiming Zhu, Zhenggang Caodoi:10.1016/j.tws.2025.114258基于简化控制体积的气支膜结构火灾倒塌数值计算方法Personnel evacuation remains possible during the time interval between the initial membrane damage and the complete collapse of air-supported membrane structures under fire conditions. However, targeted research is limited due to the destructive nature of fire-induced collapse experiments and the complexity of simulations involving fluid-thermal-structural coupling. This study proposes a simplified segmental numerical method based on a control volume model and thermodynamic theory, in which the fire-related thermal parameters are obtained through large eddy simulation using FDS, to a nalyze the full fire evolution process from high-pressure stage to pressure-relief stage caused by the membrane damage and then to low-pressure stage. S mall-scale structural collapse tests are conducted under both non-fire and fire conditions to validate the proposed method, and parametric simulations of a full-scale fire test case are performed to systematically investigate collapse characteristics. Results show that, with fans operating normally, collapse occurs only when internal pressure drops to a critical threshold. Compared to non-fire conditions, fire-induced thermal buoyancy lowers this critical pressure, thereby prolonging structural collapse duration particularly during the pressure-relief stage and the early low-pressure stage. But when the membrane damage area becomes sufficiently large and the internal air temperature drops to a relatively low level, the volumetric reduction rate resembles that of the non-fire scenario. The findings provide theoretical and practical insights for the development of fire-resistant design methodologies and safety assess ment frameworks for air-supported membrane structures.在火灾条件下，从初始膜损伤到气支膜结构完全倒塌这段时间内，人员疏散仍然是可能的。然而，由于火灾坍塌实验的破坏性和涉及流-热-结构耦合的模拟的复杂性，有针对性的研究受到限制。本文提出了一种基于控制体积模型和热力学理论的简化分段数值方法，通过FDS大涡模拟获得与火灾相关的热参数，分析了火灾从高压阶段到膜损伤引起的减压阶段再到低压阶段的整个演变过程。在非火灾和火灾条件下进行了小型结构倒塌试验，验证了所提出的方法，并进行了全尺寸火灾试验案例的参数模拟，系统地研究了倒塌特性。结果表明，在风机正常运行的情况下，只有当内压降至临界阈值时才会发生坍塌。与非火灾条件相比，火灾引起的热浮力降低了这个临界压力，从而延长了结构倒塌的持续时间，特别是在减压阶段和早期低压阶段。但当膜损伤面积足够大且内部空气温度下降到较低水平时，其体积减小率与非火灾情况相似。研究结果为空气支撑膜结构的耐火设计方法和安全评估框架的发展提供了理论和实践见解。Snap-through self-peeling of liquid crystal elastomer bilayers under constant lightDali Ge, Shenshen Wei, Yongsheng Liang, Kai Lidoi:10.1016/j.tws.2025.114260恒光作用下液晶弹性体双层的自剥离Self-oscillating systems convert steady external stimuli into continuous motion, enabling applications in robotics, energy absorption, optics, and logic. Yet most existing designs overlook adhesion-based instabilities—such as snap-through debonding—that enable rapid state transitions and large-amplitude actuation. Inspired by the attachment-detachment mechanis m of geckos, we propose a novel snap-through self-peeling oscillator based on a photo-responsive liquid crystal elastomer bilayer strip with rigid substrate featuring two distinct adhesion energy barriers. Using a nonlinear beam deformation model and Dugdale's cohesive law, we develop a nonlinear dynamic model to describe the self-peeling behavior of the liquid crystal elastomer bilayer strip under steady illumination. Through quasi-static ana lysis, we identify two distinct operating regimes for the bilayer strip: a static regime and a self-peeling regime. Under constant illumination, light-induced contraction causes the bilayer to peel off from the strongly adhesive rigid substrates until it undergoes snap-debonding. In the dark, the recovery process enables the bilayer to adhere to weakly the adhesive rigid substrate until snap-rebonding occurs, thereby facilitating a self-sustained "peeling-debonding-adhering-rebonding" cycle. Additionally, we explore the critical conditions required to trigger self-peeling and the control of the self-peeling duration. This self-sustained oscillation system offers advantages such as controllable high-amplitude oscillations, a wide range of controllable oscillation periods, well-defined reciprocating motion trajectories, and a simple structure. These features could pave the way for innovations in actuated devices, rescue operations, military industries, and other fields.自振荡系统将稳定的外部刺 激转换为连续运动，使其在机器人、能量吸收、光学和逻辑方面的应用成为可能。然而，大多数现有的设计都忽略了基于黏附的不稳定性，例如卡扣脱粘，这使得快速状态转换和大振幅驱动成为可能。受壁虎的附着-剥离机制的启发，我们提出了一种基于具有两种不同粘附能垒的刚性衬底的光响应液晶弹性体双层条带的自剥离振荡器。利用非线性光束变形模型和Dugdale内聚定律，建立了稳态光照下液晶弹性体双层条带自剥离的非线性动力学模型。通过准静态分析，我们确定了两种不同的双层带材运行机制：静态机制和自剥离机制。在恒定的光照下，光诱导的收缩导致双分子层从强粘合的刚性基材上剥离，直到发生卡扣脱粘。在黑暗中，恢复过程使双分子层能够粘附在弱粘接的刚性基材上，直到发生卡扣-再粘接，从而促进了一个自我持续的“剥离-脱粘-粘接-再粘接”循环。此外，我们还探讨了触发自剥离所需的临界条件和自剥离持续时间的控制。这种自持续振荡系统具有高振幅振荡可控、振荡周期范围广、往复运动轨迹明确、结构简单等优点。这些特性可以为驱动设备、救援行动、军事工业和其他领域的创新铺平道路。Investigation into the dynamic response of steel box structures with foam-filled corner connections subjected to internal blast loadingYuan Guo, Zixiao Hu, Sipei Cai, Daihui Mo, Yeping Xiong, Yuansheng Cheng, Pan Zhangdoi:10.1016/j.tws.2025.114261 内爆荷载作用下填充泡沫角连接钢箱结构动力响应研究The vulnerability of the box structure under internal blast loading drives the innovative design of the corner connection. In present study, the box structures with novel foam-filled corner connections were designed, fabricated, and finally tested under internal blast loading. Parallelly, a three-dimensional model based on finite element method-s moothed particle hydrodynamics was proposed to investigate the deformation mechanis m and energy absorption of the box structures. The results showed that the foam-filled corner connections had the potential to enhance the blast resistance of the box structures. Specifically, the bulkhead with a foam-filled inclined corner connection exhibited lower maximum displacement, which was 4.1% s maller than that of the triangular corner connection. The connection plates mainly experienced bending deformation, while the aluminum foam could support the deformation of the plates. The inclined corner connection also promoted earlier activation of membrane tension, thereby advancing the onset of the saturation effect in plastic deformation. Additionally, the triangular design absorbed approximately 20% more energy but was more susceptible to fracture, with the critical TNT (Trinitrotoluene) charge being 61% lower than that of the inclined connection. These findings demonstrate that the inclined foam-filled corner connection offers superior blast resistance, while the triangular connection is more conducive to higher energy dissipation but at the cost of reduced structural integrity.箱体结构在内爆荷载作用下的脆弱性，推动了转角连接的创新设计。在本研究中，设计、制作了具有新型泡沫填充角连接的箱形结构，并进行了内爆荷载试验。同时，提出了基于有限元方法-光滑颗粒流体力学的三维模型，研究了箱形结构的变形机理和能量吸收。结果表明，泡沫填充角节点具有提高箱式结构抗爆破能力的潜力。其中，泡沫填充斜角连接的舱壁最大位移较小，比三角形角连接的舱壁最大位移小4.1%。连接板主要经历弯曲变形，泡沫铝可以支撑连接板的变形。斜角连接也促进了膜张力的早期激活，从而提前了塑性变形中饱和效应的发生。此外，三角形设计多吸收了约20%的能量，但更容易破裂，其临界TNT（三硝基 甲苯）装量比倾斜连接低61%。这些结果表明，倾斜泡沫填充角连接具有更好的抗爆炸性能，而三角形连接更有利于更高的能量耗散，但以降低结构完整性为代价。Design and Validation of Bionic Ribs Based on a Four-Parameter Mechanical A nalysis ModelJundong Zhang, Zhixin Liu, Weidong Liu, Ruiyao Liu, Shihang Chen, Yongxin Ren, Hai Liu, Zhenglei Yu, Luquan Rendoi:10.1016/j.tws.2025.114263基于四参数力学分析模型的仿生肋设计与验证The biofidelity of Anthropomorphic Test Devices (ATDs) is critical for accurate human injury assess ment in automotive passive safety. However, current ATDs ribs exhibit significant differences from human ribs in both structural and mechanical properties. Moreover, unknown physical conditions in Post-Mortem Human Surrogate (PMHS) rib dynamic bending tests make it difficult to reproduce the time-domain responses of PMHS experiments using finite element models (FEMs). This study proposes a mechanical an alysis model (MAM) with four equivalent parameters: mass factor β, coefficient of restitution e, foam stiffness KF, and equivalent rib stiffness KR. Based on PMHS test data, the dynamic bending test is accurately reconstructed within the FEM by identifying β, e, and KF in the MAM. The reconstructed model shows excellent agreement with PMHS time-domain data in key mechanical indices such as fracture time, fracture force and deflection, with a maximum error not exceeding 4%. Furthermore, a variable cross-section design method based on a two-tangent parameter approach is developed, combined with a nonlinear material stiffness, to achieve both the structural design and expression of KR for the bionic ribs. By modifying the physical material properties via MAM, coupling between the bionic ribs and human ribs in both geometric configuration and mechanical performance is accomplished. To validate the effectiveness of the MAM, bionic ribs made of steel - PVC composites are designed and simulated using THUMS ribs as a benchmark. The results show that the bionic ribs have a mean absolute error of 0.743 ± 0.350 mm in centroidal path, exhibit nonlinear stiffness behavior consistent with THUMS under dynamic bending, and demonstrate mean relative errors of 2.569% in rib force and 0.255% in deflection at fracture time, with a maximum error below 7%. The MAM-based design approach effectively improves biofidelity and model accuracy, demonstrating strong practical applicability.在汽车被动安全中，拟人化测试装置（ATD）的生物逼真度对于准确评估人体损伤至关重要。然而，目前的 ATD 肋骨在结构和机械性能方面与人类肋骨存在显著差异。此外，PMHS肋骨动态弯曲试验中的未知物理条件使得难以使用有限元模型（FEM）重现 PMHS 实验的时间域响应。本研究提出了一种机械分析模型（MAM），包含四个等效参数：质量系数β、恢复系数 e、泡沫刚度 KF 和等效肋骨刚度 KR。基于 PMHS 测试数据，在有限元模型中通过识别 MAM 中的β、e 和 KF 准确地重建了动态弯曲试验。重建模型在诸如骨折时间、骨折力和挠度等关键机械指标上与 PMHS 时间域数据表现出极好的一致性，最大误差不超过 4%。此外，基于双切线参数法开发了一种可变截面设计方法，并结合非线性材料刚度，实现了仿生肋骨的结构设计和 KR 的表达。通过 MAM 修改物理材料属性，实现了仿生肋骨与人体肋骨在几何构型和机械性能上的耦合。为了验证 MAM 的有效性，以 THUMS 肋骨为基准，设计并模拟了钢 - PVC 复合材料制成的仿生肋骨。结果表明，仿生肋骨的质心路径平均绝对误差为 0.743 ± 0.350 毫米，在动态弯曲下表现出与 THUMS 一致的非线性刚度行为，在骨折时刻的肋骨力和挠度的平均相对误差分别为 2.569% 和 0.255%，最大误差低于 7%。基于 MAM 的设计方法有效地提高了生物逼真度和模型精度，具有很强的实用性。来源：复合材料力学仿真Composites FEM