Numerical simulation of impact toughness of welded joints for X80 pipeline steel

摘要

The LS/DYNA finite element software is used to simulate the impact testing with a reasonable FEM model. The numerical results show that the impact toughness is affected by yield strength and failure strain. The impact toughness is different when the notch is located at different regions. The impact toughness is the worst for a notch located at the HAZ and best in the base metal. It can be used to predict the impact toughness of welded joint and provides a new method to evaluate the properties of joint.