Abstract
A general theoretical analysis is presented to prove that, under mixed mode fracture, truss-like mixed mode cohesive laws (cohesive laws that are coupled in a special manner such that the traction vector follows the separation/opening vector) are path independent only in the limited case where the fracture resistance (and effective traction) is independent of the phase angle of openings. To verify the theoretical analysis, a specific class of truss-like cohesive laws, coupled with a failure criterion for damage initiation and an effective opening displacement is used. It is shown analytically and numerically that these cohesive laws are path dependent.
Original language | English |
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Journal | Engineering Fracture Mechanics |
Volume | 91 |
Pages (from-to) | 117-132 |
ISSN | 0013-7944 |
DOIs | |
Publication status | Published - 2012 |
Keywords
- Cohesive law
- Cohesive element
- Path dependence