2/20/2023 0 Comments Power factory 2018 crackstudied the local fracture resistances and crack growth paths of a dissimilar metal-welded joint at different crack positions with different material constraints. investigated the fracture behaviors of the over-matched and under-matched high-strength low-alloyed steel weld joints. Besides, some scholars focused their studies on the fracture behavior of dissimilar metal-welded joints affected by the material constraint. studied the J-resistance curves, fracture toughness, crack growth paths and stress triaxiality of bi-materials under different work-hardening mismatches. investigated the altering of fracture resistance and crack path deviation in the bi-material interface region affected by the material constraint. Where A P E E Q is the areas surrounded by the ε p isolines ahead of the crack tip and A r e f is the reference areas surrounded by the ε p isolines in a standard test.įurthermore, many scholars focused their studies on the fracture behavior of bi-material affected by the material constraint. analyzed a two-material problem where the crack was located in the interface of two dissimilar materials and established a material constraint parameter M to consider the effect of strength mismatch on crack tip stress fields, as follows: to show how the slip-line fields were changed by altering the yield strength of the base material. The material constraint was firstly demonstrated by Joch et al. In addition, the constraint effect due to material strength mismatch, which be called the material constraint, is also an important factor effects on the fracture behavior of material. Some constraint parameters, such as T, Q, A 2, T Z, have been established to represent the stress fields at the crack tip under different geometry constraint conditions. In recent years, the constraint effect due to structure or specimen geometry have been investigated as an important factor affecting the stress distribution around a crack. Constraint is the resistance of a structure or specimen against plastic deformation.
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