【新文速递】2024年1月8日复合材料SCI期刊最新文章_ACT_Mechanical_Fluent_System_Inspire_振动_疲劳_断裂_复合材料_碰撞_化学_通用_航空_航天_汽车_电子_裂纹_理论_材料

【新文速递】2024年1月13日固体力学SCI期刊最新文章

今日更新：International Journal of Plasticity 1 篇，Thin-Walled Structures 3 篇International Journal of PlasticityStrengthening and ductilization of a refractory high-entropy alloy over a wide strain rate range by multiple heterostructuresRuixin Wang, Yu Tang, Yuanlin Ai, Shun Li, Li'an Zhu, Shuxin Baidoi:10.1016/j.ijplas.2024.103882 通过多重异质结构在宽应变率范围内强化和延展难熔高熵合金To improve the mechanical properties of refractory high-entropy alloy (RHEA), whose strain hardening capacity is relatively weak, over a wide strain rate range, the multi-heterostructure strategy is investigated in this work. Based on the composition and annealing design, the multi-heterostructure consisting of two mutually coherent body-centred cubic solid solution matrices and penetrating complex phases is achieved in TiZrNbTaNi0.05 RHEA (MH-RHEA). Under quasi-static loading, this multi-heterostructure takes both good precipitation strengthening and hetero-deformation-induced hardening effects, diversifies the deformation modes, finally promotes the strain hardening capacity and deformation homogeneity. The tensile yield strength, ultimate tensile strength and elongation of MH-RHEA are 1195±12 MPa, 1235±9 MPa and 22.4±1.0%, respectively, which are 18%, 20% and 50% higher than those of the base alloy. Under dynamic loading (∼103 s−1), the thermal effect can be neutralized and the deformation localization is avoided. Consequently, a high yield strength of ∼1450 MPa and a large ultimate strain of ∼25% without fracture at a high strain rate of 2390 s−1 are realized in MH-RHEA. This heterostructure strategy offers a new paradigm to enhance the strength and ductility simultaneously of RHEAs over a wide strain rate range.难熔高熵合金（RHEA）的应变硬化能力相对较弱，为改善其在宽应变速率范围内的机械性能，本研究采用了多异质结构策略。基于成分和退火设计，在 TiZrNbTaNi0.05 RHEA（MH-RHEA）中实现了由两个相互协调的体心立方固溶体基体和渗透复相组成的多异质结构。在准静态加载条件下，这种多元异质结构兼具良好的沉淀强化和异质变形诱导硬化效应，使变形模式多样化，最终提高了应变硬化能力和变形均匀性。MH-RHEA 的拉伸屈服强度、极限拉伸强度和伸长率分别为 1195±12MPa、1235±9MPa 和 22.4±1.0%，比基合金分别高出 18%、20% 和 50%。在动态加载（∼103 s-1）条件下，可以中和热效应，避免变形局部化。因此，在 2390 s-1 的高应变速率下，MH-RHEA 实现了 ∼1450 MPa 的高屈服强度和 ∼25% 的大极限应变，且没有断裂。这种异质结构策略为在宽应变速率范围内同时提高 RHEA 的强度和延展性提供了一种新的范例。Thin-Walled StructuresOut-of-plane Engineering Constants of Beetle Elytra Inspired Sandwich CoresXindi Yu, Qicheng Zhang, Mark Schenk, Fabrizio Scarpadoi:10.1016/j.tws.2024.111571甲虫叶甲启发的三明治夹芯平面外工程常数The Beetle Elytron Plate (BEP) is a new type of biomimetic sandwich core developed as a potential replacement of classical honeycomb cores in sandwich panels. This work investigates the out-of-plane engineering elastic constants, including Young's and pure shear moduli of parametric BEP cellular topologies. The BEP core configurations are simulated using Finite Element models, with both full-scale and representative unit cells for asymptotic homogenization. The numerical models are also validated by flatwise compression and out-of-plane pure shear loading experiments performed according to ASTM standards. The benchmarked models are then used to perform a parametric analysis of the beetle elytra cellular cores against their geometry characteristics. Results show that the out-of-plane Young's modulus E3/Es and the transverse pure shear modulus G31/Es of both BEP configurations are larger than those of the classic hexagonal honeycombs and increase when the size of the unit cell cylinders, or rib thickness become large. The specific shear moduli of the beetle-elytra inspired honeycombs are however lower than those of classical pure hexagonal honeycomb configurations, although the added presence of cylinders within the cell configuration offers opportunities for tailoring the design of multifunctional cores.Beetle Elytron Plate（BEP）是一种新型仿生物夹层芯材，可替代夹层板中的传统蜂窝芯材。这项工作研究了平面外工程弹性常数，包括 BEP 蜂窝拓扑参数的杨氏模量和纯剪切模量。采用有限元模型模拟 BEP 核心配置，并使用全尺寸和代表性单元格进行渐近均质化。根据 ASTM 标准进行的平面压缩和平面外纯剪切加载实验也对数值模型进行了验证。然后使用基准模型对甲虫鞘甲壳细胞核的几何特征进行参数分析。结果表明，平面外杨氏模量 E3 / Es 和横向纯剪切模量 G31/Es 都比传统的六边形蜂窝大，而且当单胞圆柱体的尺寸或肋条厚度变大时，其剪切模量也会增大。然而，受甲虫鳞片启发的蜂窝的特定剪切模量低于经典的纯六边形蜂窝结构，尽管在单元结构中增加了圆柱体，为定制多功能芯材的设计提供了机会。Damage and energy absorption behavior of CFRP/aluminum hybrid open-section thin-walled columns subjected to quasi-static loadingHaolei Mou, Yingshi Chen, Zhenyu Feng, Haibao Liudoi:10.1016/j.tws.2024.111593承受准静态荷载的 CFRP/铝混合开口薄壁柱的损伤和能量吸收行为In this study, the damage and energy absorption behaviors of carbon fiber reinforced plastic (CFRP)/aluminum (Al) hybrid open-section thin-walled columns were explored. The results showed that hybrid columns exhibited tremendous merits for the energy absorption. The CFRP-Al columns could absorb 61.21% and 44.11% more energy than the corresponding single CFRP columns and the single Al columns with the same thickness, respectively. Furthermore, the specific energy absorption (SEA) of HI-2 columns was 16.29% and 85.06% higher than that of the corresponding single CFRP columns and the single Al columns. However, different configurations of hybrid columns underwent different damage and failure processes. In addition to Al-CFRP columns, the open-section thin-walled structure exhibited a positive hybrid interaction effect, and the energy dissipated 45.6% of the total energy absorption. The Al inner layer absorbed a large amount of energy by inducing the CFRP to undergo large deformation and progressive damage, thus, the CFRP-Al columns and CFRP-Al-CFRP columns dissipated more energy and had a higher energy absorption efficiency. Concurrently, the energy absorption behavior of the hybrid column could be changed by different proportions of 45° layers. The present research on damage and energy absorption mechanisms provides some guidance for the lightweight and crashworthiness design of hybrid open-section thin-walled columns.本研究探讨了碳纤维增强塑料（CFRP）/铝（Al）混合开口薄壁柱的损伤和能量吸收行为。结果表明，混合柱在能量吸收方面表现出巨大优势。与相同厚度的单一 CFRP 柱和单一铝柱相比，CFRP-铝柱吸收的能量分别增加了 61.21% 和 44.11%。此外，HI-2 柱的比能量吸收（SEA）分别比相应的单一 CFRP 柱和单一铝柱高出 16.29% 和 85.06%。然而，不同结构的混合柱经历了不同的破坏和失效过程。除 Al-CFRP 柱外，开截面薄壁结构也表现出了积极的混合相互作用效应，能量耗散占总吸能的 45.6%。Al 内层通过诱导 CFRP 发生大变形和渐进破坏吸收了大量能量，因此 CFRP-Al 柱和 CFRP-Al-CFRP 柱耗散的能量更多，能量吸收效率更高。同时，45°层的不同比例可改变混合柱的能量吸收行为。本研究对破坏和能量吸收机理的研究为混合开截面薄壁柱的轻量化和耐撞性设计提供了一些指导。Thermal analysis for laminated plates with arbitrary supports under non-uniform temperature boundary conditionsHai Qian, Zhentao Wang, Chunhua Lu, Dongsheng Cai, Yang Yangdoi:10.1016/j.tws.2024.111595非均匀温度边界条件下带有任意支撑的层压板的热分析This paper aims to investigate thermal behaviors of composite laminated plates with different supports under non-uniform temperature boundary conditions. The thermo-elastic solutions of temperature, displacements, and stresses for the laminated plate with arbitrary layer numbers and thickness are obtained based on the three-dimensional theory of thermoelasticity. By applying the Fourier law of heat conduction and the thermoelastic equations, the state-space equations are established by employing the temperature, heat flux, displacements, and stresses as state variables without the hypothesis of displacement form. The differential quadrature method is introduced to discretize the in-plane state variables. On the basis of the continuities of state variables at the interfaces in the laminated plate, the relationships of temperature, heat flux, displacements, and stresses between the top and bottom surfaces can be derived. By simultaneously considering temperature and mechanical boundary conditions applied to the surfaces of the laminated plate, the initial state variables for temperature, displacements, and stresses can be determined uniquely. The errors in the temperature, displacements and stresses resulting from the differential quadrature method can be eliminated by incrementally augmenting the number of sampling points in the convergence study. The accuracy of the present method is thoroughly verified by comparing the current results with both the finite element solutions and the findings reported in previous literature. Finally, the influences of surface temperature, length-to-thickness ratios, material properties, layer numbers, and support types for the distributions of the temperature field, displacements, and stresses in the laminated plate are discussed in detail.本文旨在研究在非均匀温度边界条件下具有不同支撑的复合层压板的热行为。基于三维热弹性理论，得到了任意层数和厚度的层压板的温度、位移和应力的热弹性解。通过应用热传导的傅立叶定律和热弹性方程，以温度、热通量、位移和应力为状态变量，建立了状态空间方程，而不假定位移形式。引入微分正交法对平面内状态变量进行离散化。在层压板界面状态变量连续性的基础上，可以推导出上下表面之间的温度、热通量、位移和应力关系。通过同时考虑层压板表面的温度和机械边界条件，可以唯一确定温度、位移和应力的初始状态变量。在收敛性研究中，可以通过逐步增加采样点的数量来消除微分正交法产生的温度、位移和应力误差。通过将当前结果与有限元求解结果和以往文献中的结论进行比较，彻底验证了本方法的准确性。最后，详细讨论了表面温度、长度厚度比、材料特性、层数和支撑类型对层压板中温度场、位移和应力分布的影响。来源：复合材料力学仿真Composites FEM

【新文速递】2024年1月8日复合材料SCI期刊最新文章

Composite Structures

Composites Part A: Applied Science and Manufacturing

Composites Part B: Engineering

Composites Science and Technology

【新文速递】2024年1月13日固体力学SCI期刊最新文章