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

作　　者：Yang Cao Dan-dan Zhang Jian-xiu Liu Kun Liu Jin-guang Du Wen-bin He Jun Ma 

机构地区：[1]Henan Key Laboratory of Intelligent Manufacturing of Mechanical Equipment,Mechanical and Electrical Engineering Institute,Zhengzhou University of Light Industry,Zhengzhou,450002,China

出　　处：《Defence Technology（防务技术）》2020年第3期627-634,共8页Defence Technology

基　　金：The authors gratefully acknowledge the financial support from National Natural Science Foundation of China(No.11602230);the Program for Innovative Research Team in Science and Technology in the University of Henan Province(No.18IRTSTHN015);Key Scientific Projects of University in Henan Province(20B430021).

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 mate rial 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.

关 键 词：Titanium aluminide JH-2 model Numerical simulation Quasi-static and dynamic compression tests Ballistic test 

分 类 号：TQ133.1[化学工程—无机化工]