A Method to Calculate the Dynamic Compressive Strength of Rock with Single Specimen

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (4) : 123-127.

YANG Renshu1,2，CHEN Jun1, XIAO Chenglong1，CHEN Shuaizhi1

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Abstract

The dynamic failure mechanism of rock in intermediate and low strain-rate is analyzed from three aspects --- failure modes, energy absorption and mechanical parameters, A new method to calculate the dynamic compressive strength of rock is presented. Pseudo-static method combined with principle of virtual work is used to build the formula, as we consider that the work done by external force to rock is more than the internal energy loss, and the damage happened because of the rock cannot endure the external load. Therefore the dynamic compressive strength σcd is equal to the static compressive strength σc’ plus the increased strength which is caused by strain-rate effect. Then the calculated value of dynamic compressive strength is compared with the experimental results in other literatures, which the two values are similar.

Key words

dynamic compression strength / failure mechanism / SHPB / Pseudo-static method;

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YANG Renshu1,2，CHEN Jun1, XIAO Chenglong1，CHEN Shuaizhi1. A Method to Calculate the Dynamic Compressive Strength of Rock with Single Specimen[J]. Journal of Vibration and Shock, 2018, 37(4): 123-127

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