Experimental study of frequency-temperature coupling effects on wave propagation through granite

Abstract

The present study investigates the frequency-temperature coupling effects on wave propagation through granite. The pendulum impact test was conducted on the thermally treated long granite bars. The wave propagation coefficients, such as attenuation ratio and wave velocity, were determined for the granite under five groups of high-temperature and six groups of incident waves with different frequencies. A relationship between the dynamic modulus of granite, frequency of stress wave and the high temperature was revealed. The frequency-temperature coupling effects on the dynamic modulus were discussed. The results show that the attenuation ratio, wave velocity and dynamic elastic modulus increase with the increase of frequency. The attenuation ratio increases with the increase of temperature, while the wave velocity and dynamic elastic modulus decrease with the increase of temperature. The proposed relationship between the dynamic modulus, frequency and temperature can efficiently describe the frequency-temperature coupling effects on the granite with acceptable error. The present study has potential in the application of wave propagation through granite in the high-temperature environment.