The effects of T-stress on the behavior of closed cracks under compression were investigated. According to the stress conditions on crack surfaces,the analytical solution of stresses near the crack tip was obtained through the Muskhelishvili method of complex functions. The rectangle specimens of sandstone with an inclined crack were tested under uniaxial compression. The calculated results were compared with the test results of sandstone specimens and the previous test results of PMMA specimens to validate...