Study on the strain-rate dependent dynamic constitutive equation of A12O3 ceramics

Xiao Qing Zhang*, Xiao Hu Yao, Jian Guo Ning, Long Mao Zhao, Gui Tong Yang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

18 引用 (Scopus)

摘要

The dynamic mechanical properties of A12O3 ceramics have been investigated using the classical and the improved techniques of Split Hopkinson Pressure Bar (SHPB). It is shown that the tested ceramic is nonlinear elastic-brittle material and insensitive to strain-rates in lower ranges but sensitive in higher ranges. The dynamic elasticity modulus and the dynamic compressive strength of the ceramic increase with the strain rate increasing. Based on the theory of damage mechanics, a uniaxial nonlinear elastic-brittle damage-modified constitutive model is proposed. The parameters of this model for the A12O3 ceramic were obtained by fitting the SHPB test data. It is a strain-rate dependent damage-modified nonlinear elastic constitutive equation of A12O3 ceramics.

源语言英语
页(从-至)226-232
页数7
期刊Baozha Yu Chongji/Expolosion and Shock Waves
24
3
出版状态已出版 - 5月 2004

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