论文标题
使用新型的几何非线性弹性脆性界面模型对复合结构中界面裂纹的数值研究：混合模式断裂条件和在结构化界面中的应用
Numerical study of interface cracking in composite structures using a novel geometrically nonlinear Linear Elastic Brittle Interface Model: mixed-mode fracture conditions and application to structured interfaces
论文作者
论文摘要
界面开裂是纤维增强聚合物（FRP）复合材料中最突出的故障模式之一。 FRP复合材料高科技应用的最新趋势利用了负载承载力的限制，通常涵盖了从几何和材料特征中产生显着的非线性效应的发展。在这项研究中，我们介绍了在经历混合模式断裂条件的几何非线性应用中，对新的线性弹性界面模型（LEBIM）进行了全面评估。该触发断裂事件的接口模型是通过提倡类似连续性的假设（对于初始非零界面厚度）提出的，并允许纳入平面内变形效应的潜在作用。通过使用混合模式分层的样品模拟样品的模拟证明了本接口模型的性能，并特别注意其在配备结构化接口的样品中。当前的预测在实验数据方面表现出了极好的一致性，从而验证了所提出的方法。
Interface cracking is one of the most prominent failure modes in fibre reinforced polymer (FRP) composites. Recent trends in high-tech applications of FRP composites exploit the limits of the load bearing capacity, generally encompassing the development of notable nonlinear effects from geometrical and material signatures. In this investigation, we present a comprehensive assessment of the new Linear Elastic Brittle Interface Model (LEBIM) in geometrically nonlinear applications undergoing mixed-mode fracture conditions. This interface model for triggering fracture events is formulated through the advocation of continuum-like assumptions (for initial non-zero interface thickness) and allows the incorporation of the potential role of the in-plane deformation effects. The performance of the present interface model is demonstrated through the simulation of specimens with mixed-mode delamination, with special attention for its application in samples equipped with structured interfaces. Current predictions exhibit an excellent agreement with respect to experimental data, validating the proposed methodology.
