【新文速递】2023年11月4日复合材料SCI期刊最新文章

今日更新：International Journal of Solids and Structures 3 篇，Journal of the Mechanics and Physics of Solids 1 篇，International Journal of Plasticity 1 篇，Thin-Walled Structures 1 篇International Journal of Solids and StructuresAn iterative plane stress integrated Transformation Field Analysis for Equivalent Homogeneous Medium characterization and localization — Application to structural holesLeconte Nicolas, Langrand Bertrand, Kruch Sergedoi:10.1016/j.ijsolstr.2023.112559 用于等效均质介质特征描述和定位的迭代平面应力综合变换场分析--应用于结构孔洞Full-scale structure models of high-energy situations exhibited insufficient localization when connector elements were employed to model the assemblies. An alternative approach using a super-element featuring a hole was proposed and successful in mechanical fields localization. However this approach was restrained to linear problems. An extension to materially non-linear problems was thus looked for, and in particular perforated plate materially non-linear fields.An iterative plane stress integrated TFA method is thus developed to relocate the micro-scale elastic–plastic mechanical fields of a plate containing an extremely soft medium / a strong discontinuity: a hole. To this end, a RVE is defined and discretized, the accuracy of the localization relation is assessed, and a radial return algorithm is set-up to integrate the constitutive equation of the micro-scale problem. The results of the proposed TFA approach are compared to an analytical solution and to non-linear FEA. The results show that the localization of elastic–plastic perforated plate mechanical fields is accurate, provided that the method is iterative and that the hole is discretized in the RVE. It is foreseen that both the sequential and integrated TFA approaches will be combined to evaluate criteria in full-scale structure computations.当采用连接器元件对装配体进行建模时，高能量情况下的全尺寸结构模型显示出定位不足。有人提出了另一种方法，即使用具有孔洞的超级元素，并在机械场定位方面取得了成功。然而，这种方法仅限于线性问题。因此，需要将其扩展到材料非线性问题，特别是穿孔板材料非线性场。因此，我们开发了一种迭代平面应力集成 TFA 方法，用于重新定位含有极软介质/强不连续性（孔）的板的微尺度弹塑性机械场。为此，对 RVE 进行了定义和离散化，评估了定位关系的准确性，并建立了径向返回算法来整合微尺度问题的构成方程。将所提出的 TFA 方法的结果与分析解法和非线性有限元分析法进行了比较。结果表明，弹性塑性穿孔板机械场的定位是准确的，前提是该方法是迭代的，并且孔在 RVE 中被离散化。可以预见，在全尺寸结构计算中，将结合顺序和综合 TFA 方法来评估标准。Cage-shaped self-folding mechanical metamaterialsMeng Zhiqiang, Gao Xu, Yan Hujie, Liu Mingchao, Cao Huijie, Mei Tie, Qing Chen Changdoi:10.1016/j.ijsolstr.2023.112560 笼状自折叠机械超材料Self-folding is an effective design method for mechanical metamaterials with complex configurations and multiple material components. However, existing self-folding mechanical metamaterials are typically limited to a single transformation, limiting their potential for various deformation modes and diverse application scenarios. In this paper, we present the design of a cage-shaped, self-folding mechanical metamaterial. This metamaterial exhibits multiple deformation modes from an initial flat state upon heating to different temperatures and subsequently remains stable upon cooling. The constituent self-folding elements of the metamaterial comprise temperature-responsive materials to achieve different folding thresholds. Theoretical models have been developed to quantify the mechanical properties of the metamaterial, enabling programmable design of its mechanical performance. We also demonstrate that the cage-shaped mechanical metamaterial has tunable mechanical properties, multi-stage load-bearing, and decoupling of mechanical performance, providing the possibility of multifunctional applications in various fields.对于具有复杂结构和多种材料成分的机械超材料来说，自折叠是一种有效的设计方法。然而，现有的自折叠机械超材料通常局限于单一变形，限制了它们在各种变形模式和不同应用场景中的潜力。在本文中，我们介绍了一种笼形自折叠机械超材料的设计。这种超材料在加热到不同温度时，会从最初的平面状态表现出多种变形模式，并在冷却后保持稳定。超材料的自折叠元件由温度响应材料组成，以实现不同的折叠阈值。我们建立了理论模型来量化超材料的机械性能，从而实现了对其机械性能的可编程设计。我们还证明，笼形机械超材料具有可调的机械特性、多级承重和解耦机械性能，为其在各个领域的多功能应用提供了可能。Asymptotic analysis of thin linear elastic layers constrained by two rigid platesMovchan A.B., Movchan N.V., Rodin G.J.doi:10.1016/j.ijsolstr.2023.112561受两块刚性板约束的线性弹性薄层的渐近分析Two asymptotic solutions are presented for linear elastic thin, not necessarily circular, cylindrical layers fully constrained by two rigid plates. Other than being small, the plate displacements and rotations are not restricted, and therefore, in general, a constrained layer is subjected to combined stretching, bending, shearing, and twisting. The first solution is restricted to layers formed by compressible solids, whose Poisson’s ratio is not too close to one half. This solution is a superposition of a polynomial displacement field, valid in the bulk of the layer, and a corrective displacement field, which decays exponentially fast away from the cylindrical surface and becomes negligible at distances comparable to the layer thickness. The second solution is not restricted in terms Poisson’s ratio but it is correct only to a leading order. This solution unifies leading-order solutions for layers formed by compressible, nearly incompressible, and incompressible solids. The unification involves a parameter characterizing the competition between compressibility and thinness.本文提出了两个线性弹性薄圆柱层（不一定是圆形）的渐近解，这些薄层完全受到两块刚性板的约束。板的位移和旋转除了很小以外没有其他限制，因此一般来说，约束层会受到拉伸、弯曲、剪切和扭曲的综合作用。第一种解法仅限于由泊松比不太接近二分之一的可压缩固体形成的层。这种解法是多项式位移场和修正位移场的叠加，多项式位移场在层的主体上有效，修正位移场在远离圆柱表面的地方以指数速度衰减，在与层厚度相当的距离上可以忽略不计。第二种解法不受泊松比的限制，但其正确性仅限于前导阶。这种解法统一了由可压缩、几乎不可压缩和不可压缩固体形成的层的先导阶解法。这种统一涉及一个参数，该参数表征了可压缩性和薄度之间的竞争。Journal of the Mechanics and Physics of SolidsA treatment of particle-electrolyte sharp interface fracture in solid-state batteries with multi-field discontinuitiesZhang Xiaoxuan, Gupta Tryaksh, Wang Zhenlin, Trewartha Amalie, Anapolsky Abraham, Garikipati Krishnadoi:10.1016/j.jmps.2023.105490多场不连续固态电池中颗粒-电解质尖锐界面断裂的处理方法In this work, we present a computational framework for coupled electro-chemo-(nonlinear) mechanics at the particle scale for solid-state batteries. The framework accounts for interfacial fracture between the active particles and solid electrolyte due to intercalation stresses. We extend discontinuous finite element methods for a sharp interface treatment of discontinuities in concentrations, fluxes, electric fields and in displacements, the latter arising from active particle-solid electrolyte interface fracture. We model the degradation in the charge transfer process that results from the loss of contact due to fracture at the electrolyte-active particle interfaces. Additionally, we account for the stress-dependent kinetics that can influence the charge transfer reactions and solid state diffusion. The discontinuous finite element approach does not require a conformal mesh. This offers the flexibility to construct arbitrary particle shapes and geometries that are based on design, or are obtained from microscopy images. The finite element mesh, however, can remain Cartesian, and independent of the particle goemetries. We demonstrate this computational framework on micro-structures that are representative of solid-sate batteries with single and multiple anode and cathode particles.在这项研究中，我们为固态电池的粒子尺度提出了一个电化学（非线性）耦合力学计算框架。该框架考虑了活性颗粒与固体电解质之间因插层应力而产生的界面断裂。我们扩展了非连续有限元方法，对浓度、通量、电场和位移的不连续性进行了尖锐的界面处理，后者是由活性粒子-固体电解质界面断裂引起的。我们模拟了电解质-活性粒子界面断裂导致接触丧失而引起的电荷转移过程退化。此外，我们还考虑了可能影响电荷转移反应和固态扩散的应力相关动力学。非连续有限元方法不需要共形网格。这样就可以灵活地根据设计或显微镜图像构建任意的粒子形状和几何结构。不过，有限元网格可以保持笛卡尔式，与粒子的几何形状无关。我们在具有单个和多个阳极和阴极粒子的固态电池微结构上演示了这一计算框架。International Journal of PlasticityModeling and numerical simulation of liquid crystal elastomers with thermo-electro-mechanical couplingGuo Qiang, Zheng Yue, Cai Shengqiangdoi:10.1016/j.ijplas.2023.103799热-电-机耦合液晶弹性体的建模与数值模拟Liquid crystal elastomer (LCE), as a newly emerging soft material, has been extensively explored to construct diverse structures for a wide range of applications. Many unique yet complex properties of LCEs originate from the tight coupling between the alignment of liquid crystal mesogens and the deformation of polymer network. It makes the modeling and simulation of the deformation of LCEs caused by the actions of multiple external stimuli very challenging. In this work, we formulate a theoretical framework to model the intricate behaviors of LCEs with thermo-electro-mechanical coupling and derive analytical solutions for homogeneous deformation. To implement the model in finite element simulation, a numerical approach that employs a quasi-convexified free energy function and achieves a key transformation of reference configuration is proposed. The numerical approach is further developed into a user subroutine for the commercial software ABAQUS. Various simulations are conducted by using it to validate the effectiveness of the model and numerical approach, as well as to demonstrate their potential applications. We hope the current work, particularly the developed program, provides a useful tool for various researchers to study the complex phenomena of LCEs.液晶弹性体（LCE）作为一种新兴的软材料，已被广泛应用于构建各种结构。液晶弹性体的许多独特而复杂的特性源于液晶介质的排列与聚合物网络的变形之间的紧密耦合。因此，对液晶介质在多种外部刺 激作用下的变形进行建模和模拟极具挑战性。在这项工作中，我们建立了一个理论框架，为具有热-电-机械耦合的 LCE 的复杂行为建模，并推导出均匀变形的解析解。为了在有限元模拟中实现该模型，我们提出了一种采用准凸自由能函数的数值方法，并实现了参考构型的关键转换。该数值方法被进一步开发成商业软件 ABAQUS 的用户子程序。我们利用它进行了各种模拟，以验证模型和数值方法的有效性，并展示其潜在应用。我们希望当前的工作，尤其是开发的程序，能为各类研究人员研究 LCE 的复杂现象提供有用的工具。Thin-Walled StructuresDynamic responses of kerosene-filled riveted tanks subjected to hydrodynamic ram caused by ballistic impactsRen Kerong, Yuan Wenhao, Hua Qing, Peng Yong, xu Wentao, Jia Haobo, li Xiangyu, Lu Fangyundoi:10.1016/j.tws.2023.111337煤油填充铆接储罐在弹道撞击造成的流体冲压下的动态响应The hydrodynamic ram (HRAM) is a hydrodynamic pressure phenomenon that occurs when high-speed projectiles impact a liquid-filled tank. During combat missions, aircraft are prone to HRAMs caused by projectile impacts, which can damage the structural integrity of riveted tanks, posing a threat to flight safety. In this study, kerosene-filled riveted tanks were chosen as the research object. The dynamic response histories of the rear panel were observed using the three-dimensional digital image correlation (3D-DIC) technique. Additionally, numerical simulations of the projectile's impact on the tank were performed using the fluid–structure interaction finite element method. The simulation results had a good fit with the experimental results. The spatial and temporal distribution of the HRAM and the effect of the projectile impact velocity on the deformation of the tank structure were further analyzed. The impulse exerted by the drag wave on the rear panel was greater than that of the pioneer wave. However, the drag wave's region was limited to a radius of 6 cm around the exit point with the impact velocity range of the projectile of 955 m·s−1–1607 m·s−1 in both the experiments and simulations. When the impact velocity of the projectile reached 955 m·s−1, radial plastic hinge lines appeared on the rear panel along the diagonal direction. When the impact velocity increased to 1607 m·s−1, radial plastic hinge lines along the diagonal direction, and traveling plastic hinges at the root of the central cross-shaped cracks appeared on the rear panel, accompanied by a petal-shaped hole. Based on the spatial distribution of the impulse on the rear panel, a dimensional relationship was established between the hole size and the impulse on the rear panel. The petal model for describing petal-shaped cracks was proposed based on the law of conservation of energy, which could predict the hole size in the case of projectile impact at high velocity. The research results are of great significance for the study of the damage of riveted tanks with HRAMs and provide support for the vulnerability analysis of aircraft tanks.流体动力冲压（HRAM）是一种流体动力压力现象，当高速射弹撞击充满液体的油箱时就会发生。在执行作战任务时，飞机很容易受到弹丸撞击而产生 HRAM，从而破坏铆接油箱的结构完整性，对飞行安全构成威胁。本研究选择煤油填充铆接油箱作为研究对象。使用三维数字图像相关（3D-DIC）技术观察了后面板的动态响应历史。此外，还使用流固耦合有限元法对弹丸对油箱的冲击进行了数值模拟。模拟结果与实验结果吻合良好。进一步分析了 HRAM 的时空分布以及弹丸撞击速度对坦克结构变形的影响。阻力波对后面板产生的冲力大于先驱波。然而，在实验和模拟中，当弹丸的冲击速度范围为 955 m-s-1-1607 m-s-1 时，阻力波的作用区域仅限于出口点周围 6 cm 的半径范围内。当弹丸的冲击速度达到 955 m-s-1 时，后面板上出现了沿对角线方向的径向塑性铰链线。当冲击速度增加到 1607 m-s-1 时，后面板上出现了沿对角线方向的径向塑性铰链线和位于中央十字形裂纹根部的游动塑性铰链，并伴有花瓣形孔。根据后面板上冲量的空间分布，建立了孔洞大小与后面板上冲量之间的尺寸关系。根据能量守恒定律，提出了描述花瓣形裂纹的花瓣模型，该模型可以预测高速弹丸冲击时的孔洞大小。该研究成果对研究带 HRAM 的铆接坦克的损伤具有重要意义，并为飞机坦克的脆弱性分析提供了支持。来源：复合材料力学仿真Composites FEM