一种用于任意铺层顺序复合材料层合板损伤演化的、自动生成的基于几何的离散有限元模型
An Auto-Generated Geometry-Based Discrete Finite Element Model for Damage Evolution in Composite Laminates with Arbitrary Stacking Sequence
AI总结：
提出一种自动生成、基于几何的离散有限元模型，通过节点匹配和面绑定约束耦合纤维断裂、基体裂纹与分层，准确预测任意铺层层合板的损伤演化与拉伸强度。
摘要：
复合材料层合板的刚度退化和渐进失效是复杂过程，涉及纤维断裂、层内基体裂纹和层间分层的演化及多模式相互作用。本文提出一种新型有限元模型，能够显式处理随机铺层层合板中的此类离散失效。在潜在裂纹分叉处保证节点匹配，以确保裂纹尖端附近正确的位移跳跃以及裂纹之间显式的载荷传递。该模型完全基于几何（无网格先决条件），不同分段通过基于面的绑定约束装配在一起，因此不需要单元分割或富集。文中包含若干数值算例，以证明该模型能够生成在试样损伤演化和拉伸强度两方面均与实验观察在定性和定量上一致的结果。据信，本模型的独特之处在于，在具有任意铺层角度和铺层方式的层合板中实现了所有三种失效类型的同时且准确的耦合。
英文摘要：
Stiffness degradation and progressive failure of composite laminates are complex processes involving evolution and multi-mode interactions among fiber fractures, intra-ply matrix cracks and inter-ply delaminations. This paper presents a novel finite element model capable of explicitly treating such discrete failures in laminates of random layup. Matching of nodes is guaranteed at potential crack bifurcations to ensure correct displacement jumps near crack tips and explicit load transfer among cracks. The model is entirely geometry-based (no mesh prerequisite) with distinct segments assembled together using surface-based tie constraints, and thus requires no element partitioning or enrichment. Several numerical examples are included to demonstrate the model's ability to generate results that are in qualitative and quantitative agreement with experimental observations on both damage evolution and tensile strength of specimens. The present model is believed unique in realizing simultaneous and accurate coupling of all three types of failures in laminates having arbitrary ply angles and layup.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
