Paper
Delamination of Bimaterial and Critical Curves of Quasi-Brittle Fracture in the Presence of Edge Cracks
- Authors:
- V. M. Kornev
- Abstract
- Critical stresses for quasi-brittle bimaterial with edge cracks have been obtained. Cracks along the plane interface of the bimaterial are simulated as bilateral cuts. The critical stresses correspond to necessary and sufficient fracture criteria and those are lower-bound and upper-bound estimates for critical states of a system. The embrittlement effect is revealed by comparison of fracture between bimaterial and homogeneous material. Estimates for effective diameters of grain separation have been obtained. It is noted that -stress affects critical stresses for very short cracks, so for cracks occupying the most of a specimen width. Critical stresses have been derived above which specimens are broken apart. Subareas on the plot of external load versus crack length are singled out where damage accumulation in material takes place after single loading. Comparison of critical stresses with the subareas mentioned above for homogeneous materials and bimaterials has been performed.
- Keywords
- Brittle and Quasi-Brittle Fracture; Structured Materials; Edge Crack; Bimaterial
- StartPage
- 164
- EndPage
- 176
- Doi
- 10.5963/AMSA0304001