Analysis on Stress Concentration Factor for Elliptical Hole Based on FEM Theory

摘要

A rectangle board with a elliptical hole was simulated with the help of FEM software, then the stress concentration factor on the edge of hole for different direction of uniformly distributed load were discussed and compared with the theoretical solution of elastic mechanics. The analysis results showed that when the load direction was along with the major axis of ellipse, the stress concentration factor increased linearly with the increase of the ellipse minor axis and major axis ratio, and the error between FEM calculation results and theoretical solution was much small. When the load direction was along with the minor axis of ellipse, there was a rapid decline for the stress concentration factor with the increase of the ellipse minor axis and major axis ratio. The model boundary between elliptical hole and crack in FEM calculation was proposed in this paper, and the principle of the openings of components was pointed out, guidance for engineering practice was provided.