Analysis of dynamic response of brittle material cement mortar under multi-axial stress

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (10) : 216-220.

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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

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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.

Key words

cement mortar / SHPB / confining pressure / equivalent strength model / damage evolution

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LI Ying-hua; YANG Li-ming;TANG Li-qun;LIU Yu-ping;WEI Zhi-qiang. Analysis of dynamic response of brittle material cement mortar under multi-axial stress[J]. Journal of Vibration and Shock, 2011, 30(10): 216-220