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 |
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页(从-至) | 226-232 |
页数 | 7 |
期刊 | Baozha Yu Chongji/Expolosion and Shock Waves |
卷 | 24 |
期 | 3 |
出版状态 | 已出版 - 5月 2004 |