Determination of Rock Tensile Strength Based on Arc Loading Splitting Test considering Modulus Effect

Tensile strength is an important control parameter for the design and stability analysis in rock engineering. In order to reveal influence of elastic modulus on tensile test results, Brazilian splitting tests were carried out specimens with different strengths, such as mudstone, white sandstone, green red marble. Longitudinal transverse strains monitored analyze maximum contact angle peak load between head disc. A numerical model was built, disc detailed revealed. Based experimental a modified formula calculate considering effect proposed theoretically. Results show that pressure increases decreases increasing modulus, which great failure; distribution can be divided into three types: parabolic I, sinusoidal, II, are suitable soft rock, medium-hard hard respectively; new models improve calculation accuracy strength.