کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1562000 | 1513955 | 2012 | 17 صفحه PDF | دانلود رایگان |

Measurements of stress–strain properties and residual stress in purpose-designed one and three-pass groove-weld specimens are used to optimise a mixed hardening constitutive model for simulating residual stresses in austenitic Type 316 stainless steel weldments. It is demonstrated that isotropic hardening over-predicts the tensile magnitude of welding residual stress in the benchmark specimens, while pure kinematic hardening gives an under-prediction of longitudinal stresses in parent material close to the weld. The most accurate predictions are those based on optimised mixed isotropic–kinematic formulations combined with a multi-pass moving heat source welding analysis.
► Residual stresses and tensile property variation in austenitic steel weldments are characterised with high reliability.
► Isotropic, kinematic, and mixed hardening models are fitted and applied in moving heat source finite element simulations.
► Optimised mixed hardening models give the most accurate predictions of residual stress and tensile property variation.
Journal: Computational Materials Science - Volume 54, March 2012, Pages 312–328