A polyaxial strength model for intact sandstone based on Artificial Neural Network

A comprehensive database of the polyaxial compressive strength of eight sandstones has been compiled from the literature. An experimental study has also been conducted on local sandstone to add up to the database. A correlation-based analysis has been performed to find out the influence of each independent parameter namely uniaxial compressive strength (UCS, σci), minor principal stress (σ3), and intermediate principal stress (σ2) on the...