TiC颗粒增强钛基复合材料细观动态力学性能

Meso-Mechanical Behavior of TiC Particle-Reinforced Titanium Matrix Composites under Dynamic Loadings

摘要:

基于不动点迭代法提出宏细观多尺度计算方法对颗粒增强钛基复合材料的静动态力学性能进行研究。采用该多尺度计算方法可以将复合材料的宏观力学性能与材料的微观结构相联系，通过迭代法从宏观角度为单胞模型提供真实的物理边界条件，将该边界条件施加到单胞有限元模型，对其进行有限元分析可最终获得复合材料的宏观力学性能。在与试验结果比较的基础上，预测颗粒形状、颗粒的体积分数、颗粒大小以及界面强度对TiC颗粒增强钛基复合材料静动态力学性能的影响, 为颗粒增强钛基复合材料力学性能的优化设计提供依据

Abstract:

A macro-meso multi-scale method was proposed to investigate the quasi-static and dynamic mechanical behavior of particle-reinforced titanium matrix composites based on a fixed point iteration method. By using this method, the macro-mechanical properties of the composites can be connected with the microstructure. The physical boundary conditions can be obtained for unit cells with the fixed point iteration method from the macro point of view. Dozens of cases have been performed to simulate the macro-mechanical characteristics of the composites by applying these displacement constraint conditions to the unit cells. Based on the comparison of numerical predictions with experimental results, the effects of particle shape, particle volume fraction, particle size and interface strength on the TiC particle-reinforced titanium matrix composites under quasi-static and dynamic loadings are predicted, which provides a basis for the optimal design of particle-reinforced titanium matrix composites