Abstract：Dissimilar metal welding parts in special vehicles equipment are the key parts that affect their performance, and different working environment temperatures also have different effects on the fracture behavior of cracks. In order to study the effect of temperature on quasi-static crack propagation in dissimilar metal welds, this paper combined the finite element of crack tip propagation and the interaction integral under thermal load and the simulation method of quasi-static crack propagation path at different temperature. Compared with the analytical solution, the correctness of the method and the region independence of the integral are proved. The research in this paper is of great engineering significance for the performance prediction of special vehicles.
2025, Vol. 46 
