Analysis of dynamic response of brittle material cement mortar under multi-axial stress
LI Ying-hua1; YANG Li-ming2; TANG Li-qun1; LIU Yu-ping1; WEI Zhi-qiang1
1.School of Civil Engineering and Transportation, South China Univ. of Tech., Guangzhou 510640, China; 2. The Faculty of Civil Engineering and Transportation, Ningbo Univ., Ningbo 315211, China
Abstract：Concrete materials used in structures generally work in state of complex stress and may bear dynamic load. So, Instron Servo-hyduaulic testing system and SHPB with confining pressure device are used in this article to investigate into the dynamic mechanical behavior of concrete material-mortar under multi-axial stress state in a wide range of strain rate; according to equivalent strength model, the strain rate coefficient and related material constants of mortar are determined experimentally; the damage evolution law of mortar under SHPB impact with confining pressure is suggested and the damage evolution parameters are determined by experiments. The experimental data are in good agreement with the theoretical values.
2011, Vol. 30 
