The Regularized eXtended Finite Element Method (Rx-FEM) with Abaqus implementation is introduced and applied to modeling fracture in laminated composites involving initiation and evolution of matrix cracking and delamination, their interaction and delamination migration. The proposed implementation in Abaqus consists of a technique for modeling the mesh-independent transverse matrix cracks within each ply as well as the delaminations between plies. A mixed-mode cohesive constitutive model is applied for delamination and matrix cracking evolution. The capabilities of the proposed implementation are validated by comparing with the experimental data of the clamped tapered beam sub-element specimen under static loading, which was designed by NASA to study the matrix crack and delamination initiation, propagation, and subsequent crack-induced delamination migration from one ply interface to another. The simulation of the failure path accurately captures significant characteristics of the sequence of damage events observed in the experiments, and the predictions show a good quantitative agreement for stiffness, peak failure load, and the delamination migration location.

引入了使用 Abaqus 实现的正则化扩展有限元方法 (Rx-FEM) 并将其应用于模拟层压复合材料中的断裂，包括基体开裂和分层的起始和演变、它们的相互作用和分层迁移。建议在 Abaqus 中的实现包括一种对每层内与网格无关的横向基体裂纹以及层之间的分层进行建模的技术。混合模式内聚本构模型适用于分层和基体开裂演化。通过与 NASA 设计的用于研究基体裂纹和分层起始、传播、以及随后的裂纹引起的分层从一层界面迁移到另一层界面。失效路径的模拟准确地捕捉了实验中观察到的损坏事件序列的重要特征，并且预测显示了刚度、峰值失效载荷和分层迁移位置的良好定量一致性。