Crack link-up for multiple site damage using an energy density approach

An energy-based crack link-up criterion for multiple site damage conditions is proposed. It is based on the magnitude of strain energy increase during the fracture of the ligament between two adjacent cracks. For the application and verification of the methodology, experiments from the open literatu...

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Bibliographic Details
Published in:Theoretical and applied fracture mechanics 2005-05, Vol.43 (2), p.233-243
Main Authors: Labeas, G., Diamantakos, J., Kermanidis, Th
Format: Article
Language:English
Subjects:
Applied sciences
Drives
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Inelasticity (thermoplasticity, viscoplasticity...)
Linkage mechanisms, cams
Mechanical engineering. Machine design
Physics
Solid mechanics
Static elasticity (thermoelasticity...)
Structural and continuum mechanics
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Summary:An energy-based crack link-up criterion for multiple site damage conditions is proposed. It is based on the magnitude of strain energy increase during the fracture of the ligament between two adjacent cracks. For the application and verification of the methodology, experiments from the open literature are used. The energy of interest is calculated using elastic–plastic finite element analysis. Numerical results obtained by the proposed methodology are in correlation with experimental data. In all cases considered the present ligament failure criterion has proved to give better predictions, as compared to alternative link-up prediction methodologies.
ISSN:0167-8442
1872-7638
DOI:10.1016/j.tafmec.2005.01.007