巴西试验拉伸强度公式的三维有限元解

he formula for calculating tensile strength of rock material in Brazilian test for near 30 years is not quite right. In order to get the accurate formula for Brazilian test which is a 3D elastic problem, we added a correcting coefficient Y to the 2D classical formula. We found that Y is a function of the height-to-diameter ratio and Poisson’s ratio. Through 40 3D-FEM analyses, we got the information about how the height-to-diameter ratio and Poisson’s ratio influence the stress distribution of Brazilian specimen. The table of correcting coefficients and the formula suitable for wide range of height-to-diameter and Poisson’s ratio are presented.