Research on dynamic characteristics of Shanxi black granite under high strain rates
JIANG Feng1,2, LI Zi-mu1, LIU Qing-feng1, GUO Hua1, XU Xi-peng1
1. Engineering Research Center for Machining of Brittle Materials of Ministry of Education, Huaqiao University, Xiamen 361021, China；
2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
A series of dynamic compression tests of Shanxi black granite under different strain rates (315.53s-1~1349.87s-1) have been carried out with Split Hopkinson Pressure Bar. Dynamic compressive strength of Shanxi black granite increased from 272.33MPa to 371.78MPa when strain rate increased from 460.09s-1 to 860.20s-1. The fracture mechanism of Shanxi black granite with high strain rates is volume fracture in the initial impact region of the shock wave and Hertzian fracture in the second half of the cylinder sample. The elastic-plastic deformation energy per unit volume of Shanxi black granite decreased with strain rate increasing. Material failure and crack propagation absorb more energy during the impact with higher strain rate, which results in severer fracture of granite material.
姜峰1,2，李子沐1，王宁昌1，郭桦1，徐西鹏1. 高应变率条件下山西黑花岗岩的动态力学性能研究[J]. 振动与冲击, 2016, 35(8): 177-182.
JIANG Feng1,2, LI Zi-mu1, LIU Qing-feng1, GUO Hua1, XU Xi-peng1. Research on dynamic characteristics of Shanxi black granite under high strain rates. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(8): 177-182.
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