The mechanical performance and a rate-dependent constitutive model for Al3Ti compound

Defence Technology

Jun Ma¹  Jin-guang Du²  Kun Liu²  Yang Cao²  Dan-dan Zhang²  Wen-bin He²  Jian-xiu Liu² 

[1] Corresponding author.;Henan Key Laboratory of Intelligent Manufacturing of Mechanical Equipment, Mechanical and Electrical Engineering Institute, Zhengzhou University of Light Industry, Zhengzhou, 450002, China;

关键词: Titanium aluminide;    JH-2 model;    Numerical simulation;    Quasi-static and dynamic compression tests;    Ballistic test;   

DOI  :  

来源: DOAJ

【 摘 要 】

The Al3Ti compound has potential application in the high temperature structure materials due to its low density, high strength and stiffness. The mechanical behaviors of the material under different loading rates were studied using compression tests. The results indicate that Al3Ti is a typical brittle material and its compressive strength is dependent on the strain rate. Therefore, a series of rate-dependent constitutive equations are needed to describe its mechanical behaviors accurately. However, it is still short of professional research on the material model for Al3Ti. In this study, the material model was developed on the basis of JH-2 constitutive equations using the experimental data. The model was then applied in simulating the impact process of Ti/Al3Ti metal-intermetallic laminate composites so as to validate the established model. Good agreement between simulation and experiment results shows the constitutive model predict the material responses under high rate and large deformation accurately. This work provides more support for the theoretical and numerical research on the intermetallic.

【 授权许可】

Unknown