OptiStruct is a proven, modern structural solver with comprehensive, accurate and scalable solutions for linear and nonlinear
analyses across statics and dynamics, vibrations, acoustics, fatigue, heat transfer, and multiphysics disciplines.
OptiStruct uses the S-N approach for calculating the fatigue life. The S-N approach is suitable for high cycle fatigue, where the
material is subject to cyclical stresses that are predominantly within the elastic range. Structures under such stress
ranges should typically survive more than 1000 cycles.
The E-N (Strain - Life) method should be chosen to predict the fatigue life when plastic strain occurs under the given
cyclic loading. S-N (Stress - Life) method is not suitable for low-cycle fatigue where plastic strain plays a central
role for fatigue behavior.
The OptiStruct Example Guide is a collection of solved examples for various solution sequences and optimization types and provides
you with examples of the real-world applications and capabilities of OptiStruct.
OS-HM-T: 6010 Fatigue Process Manager (FPM) using S-N (Stress - Life) Method OptiStruct uses the S-N approach for calculating the fatigue life. The S-N approach is suitable for high cycle fatigue, where the material is subject to cyclical stresses that are predominantly within the elastic range. Structures under such stress ranges should typically survive more than 1000 cycles.
OS-HM-T: 6020 Fatigue Process Manager (FPM) using E-N (Strain - Life) Method
The E-N (Strain - Life) method should be chosen to predict the fatigue life when plastic strain occurs under the given cyclic loading. S-N (Stress - Life) method is not suitable for low-cycle fatigue where plastic strain plays a central role for fatigue behavior.