Experimental and Numerical Simulation Analysis of Stress Wave Propagation in Granite
To investigate the stress wave attenuation in Huashan granite,pendulum impact tests are conducted on one-dimensional granite bar specimens to detect and analyze pulse amplitude attenuation and signal propagation features.Subsequently,dynamic test simulations and analyses are performed using LS-DYNA commercial software with the Holmquist-Johnson-Cook(HJC)constitutive model.The numerical results of stress wave attenuation in granite rods are compared with experimental data to validate the applicability of the HJC parameters to Huashan granite and to analyze stress wave propagation and attenuation patterns.Results indicate that in Huashan granite,stress wave amplitude decays exponentially with increasing propagation distance,with an attenuation coefficient η of approximately 0.181.The HJC constitutive model effectively simulates stress wave propagation in Huashan granite,and the corresponding HJC model parameters are determined based on experimental results.These findings have provided valuable insights for the safety and stability analysis of mining explosions in granite rock masses.
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