Abstract:
Transverse fillet lap weld joint is designed for tensile strength as one of the
plates exerts shear force while the other one exerts tensile force. So, stress
prediction is not easy. Stress distribution at the fillet weld with lap joint is predicted
without residual stresses previously. Various experimental and analytical
approaches are listed in literature review. Stresses at the fillet weld are obtained
only at realistic set of boundary conditions. This work includes stress distribution at
the weldment using Coupled Field Transient Analysis in ANSYS workbench.
Temperature dependent mechanical and thermal properties of structural steel A992
grade 50 at elevated temperatures upto 20000C are used for non-linear analysis.
Multi-linear isotropic hardening plasticity model is used for non-linear strain
hardening response until necking begins. Moving heat is modelled using ACT
extension. Structural distortion is the outcome of this heat flux input and residual
stresses are generated due to temperature field developed. Stresses at different
paths are predicted in the presence of residual stresses. The findings of this study
indicate that stresses obtained are significantly higher in the presence of residual
stresses and their behaviour are also changed.
