Delamination of Bimaterial and Critical Curves of Quasi-Brittle Fracture in the Presence of Edge Cracks

Damage Accumulation and Fracture of Weld Joints under Low-Cyclic Loading Conditions

“…Here w < ∞ is the plane specimen width, ( ) for bimaterial [14,15]. The Young's modulus of the bimatrial components are considered to be coincident, the yield strengths of the materials differ ( Y σ is the least yield strength), Damage Mechanics: Theory, Computation and Practice delamination occurs along a plane interface between materials.…”

“…. Embrittlement of the bimaterial takes place as compared to the homogenous material since the pre-fracture zone of the bimaterial is two times narrower than that of the homogenous material [14,15].…”

“…Recent results [23] concerning weld seams when these are delaminated indicate that there exist various schemes of fracture, but the scheme of delamination of bimaterial can be considered as principal [14,15]. Study the process of bimaterial delamination under conditions of fatigue loading.…”

“…The critical SIFs for sufficiently long cracks are expressed via conventional constants of brittle and quasi-brittle materials with the regular structure. Derived relations (15) Values of critical SIFs for brittle and quasi-brittle materials can be borrowed from handbook [24]. Assume that critical SIFs for sufficiently long cracks are given.…”