(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，西安 710016)
摘 要:
关键字: 钛基复合材料；颗粒增强；力学性能；数值模拟
（1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
2. Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China）
Abstract:Static and dynamic behaviors of TiC particle reinforced titanium matrix composite TP650 and titanium alloy matrix were studied by MTS810 testing apparatus and a split Hopkinson tension bar (SHTB), and the stress—strain curves of materials at different strain rates were obtained. The results show that with the strain rate increasing, the yield stresses of the composites and the matrix (a strain rate sensitive material) also increase. The dominating failure types of TP650 are tearing in matrix around particles and debonding between particles and matrix along with few particle fractures. Assuming that the inhomogeneous cells of composites are arrayed periodically in space, the numerical simulations of static and dynamic behaviors of titanium matrix composites with finite element software are carried out and the results agree with experiment results well. The effects of particle shape and particle volume fraction on the static and dynamic behaviors of TiC particle reinforced titanium matrix composites are also predicted by numerical simulations.
Key words: titanium matrix composites; particle reinforced; mechanical properties; numerical simulation
