Constant and Variable Amplitude Cyclic Plasticity in 316L Stainless Steel

摘要

In this paper, cyclic plastic behavior of 316L stainless steel has been investigated through uniaxial experiments. An elasto-plastic material model is proposed that builds on a Chaboche based model that is readily available in commercial FE-software. The model has been calibrated for 316L through cyclic symmetric strain experiments for a strain range up to 4 percent. Experiments show that strain loading history and strain range have a significant impact on the behavior of the material. The plasticity model available in FE-codes only depends on the maximum equivalent plastic strain though. More complex material models require a significant number of parameters to be calibrated and require extensive experiments to provide the required calibration data. For most applications this calibration effort is too extensive. To include both phenomena of strain history and strain range dependency, at least in a basic manner, a user subroutine was created that aids the material model in describing these dependencies.