Abstract

This article proposes a three-dimensional (3D) stochastic progressive damage simulation model for the fiber-reinforced polymer matrix composite laminates. Constituents’ strength and fracture energy of each lamina were accounted as spatially varying random fields by 3D Karhunen–Loeve expansion method. Damage mechanisms modeled by continuum damage mechanics include internal damages of matrix and fiber. An anisotropic damage model was used for damage initiation and evolution of each lamina. By the proposed model, we investigated influences of variabilities in the lamina strength properties, and fracture energies along with delamination damage to the damage progression, strength, and post-failure behavior.

摘要

本文提出了一种用于纤维增强聚合物基复合材料层压板的三维（3D）随机渐进损伤模拟模型。通过 3D Karhunen-Loeve 扩展方法，将每个层的成分强度和断裂能视为空间变化的随机场。由连续损伤力学建模的损伤机制包括基体和纤维的内部损伤。各向异性损伤模型用于每个层的损伤起始和演变。通过所提出的模型，我们研究了层板强度特性和断裂能的变化以及分层损伤对损伤进展、强度和失效后行为的影响。