Splitting tensile mechanical behavior and failure characteristics of thermally damaged rock Available to Purchase

The Brazilian disc specimen (BDS) and flattened Brazilian disc specimen (FBDS) test was conducted on the thermally damaged rock (from room temperature to 1000°C) that was subjected to static loads. The temperature effects on the splitting tensile strength (STS) of BDS and FBDS were investigated. Then, the FBDS test was conducted in thermally damaged rock by way of the split Hopkinson pressure bar. The high-temperature and strain rate effects on STS were evaluated, and the relationship between the STS growth factor and the high-temperature and strain rate was established. The results indicated that in the sandstone failure modes, not only did a strain rate threshold exist but also a temperature influence threshold existed. Below 800°C, the FBDS under a high strain rate failed through the plane that was determined by the diameter perpendicular to the two platforms. The sample failure mode took the form of two complete halves. Increasing the loading rate resulted in a triangle-like crushing area being observed at both platform ends; the higher the loading rate was, the larger the crushing area. When the treatment temperature exceeded 800°C, the sample failure mode took the shape of being crushed.