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- Title
A note on the coupled and dual energy release rates for VCCT.
- Authors
Farkash, Elad; Banks‐Sills, Leslie
- Abstract
The coupled energy release rate may be used with the virtual crack closure technique (VCCT) method to determine the stress intensity factors of interface cracks. Different equations were presented over the years using this parameter. In recent papers, a new approach was presented by the authors. This approach includes two additional energy release rates, called here, the dual energy release rates. Here, the coupled and dual energy release rates are explored and well established. This leads to a new and more suitable equation for calculating the mode mixity or phase angle. In addition, a geometrical interpretation between the energy release rates for both homogeneous and interface crack problems is found. A problem of an interface crack between two linear elastic, isotropic, and homogeneous materials in an infinite body is presented. This problem emphasizes the advantage of the new equation, and the geometrical relation between the energy release rates is illustrated. Highlights: The VCCT was reappraised for interface cracks.A previous relation for calculating the phase angle is found to be invalid for some cases.A new relation for calculating the phase angle that is valid for all cases is presented.A geometrical interpretation for this relation is presented.
- Subjects
CRACK closure; EQUATIONS
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2021, Vol 44, Issue 12, p3363
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.13562