Research Initiation: Three-Dimensional Fracture Analysis of Rubber Composite Structures

橡胶复合材料的破坏机理极其复杂，本质上是三维的。本项目致力于发展一种三维有限元模型，该模型包括几何和材料的非线性、各向异性和双模材料行为，用于描述橡胶复合材料的界面/层间失效。将建立三维撕裂能计算公式、表征不同界面失效的失效准则和预测裂纹扩展路径。重点将放在模型的简单性和准确性上，并使用计算机图形学来表示界面失效机理，以便更好地理解橡胶复合材料结构。所获得的有限元结果将使用基准问题和现有的实验数据进行验证。

Failure mechanisms of rubber composites are extremely complex and three dimensional in nature. This project focuses on the development of a 3-D finite element model which includes geometrical and material nonlinearities, anisotropic, and bimodular material behavior for characterizing the interface/interlaminar failures in rubber composites. Formulations for 3-D tearing energy computations, failure criterion for characterizing different interface failures and prediction of crack propagation path will be developed. Emphasis will be placed on the simplicity of the model and accuracy, and the use of computer graphics to represent the interface failure mechanisms for better understanding of rubber composite structures. The finite element results obtained will be validated using benchmark problems and available experimental data.