Simulation of direct shear tests using a forces on fracture surfaces (FFS) approach

Abstract The aim of this work is to provide a complete data set direct shear tests and propose corresponding simulation approach. Tests have been conducted on crystalline rock samples applying constant normal load (CNL) stiffness (CNS) boundary conditions. A physical consistent algorithm which explicitly calculates the forces acting fracture surface (FFS) has developed. This FFS approach can explain occurrence degradation shows main characteristics. After all, shearing rough joints remains complex process differences between laboratory results are still significant in some cases. All input files provided free for download testing.