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

作　　者：宋卫东[1] 宁建国[1] 毛小南[2] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2011年第9期1555-1560,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(10625208);北京理工大学爆炸科学与技术国家重点实验室自主研究课题(ZDKT10-03a)

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。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.

关 键 词：钛基复合材料 力学性能 不动点迭代 动态载荷 

分 类 号：TB331[一般工业技术—材料科学与工程]