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A Comparison of Energy Release Rates for Locally Buckled Laminates Containing Symmetrically and Asymmetrically Located Delaminations

Department of Mechanical, Aerospace and Manufacturing Engineering, Syracuse University, Syracuse, NY 13244

Todd M. Krafchak

Department of Mechanical, Aerospace and Manufacturing Engineering, Syracuse University, Syracuse, NY 13244

Results are presented from a study to determine energy release rate and mode ratio for a locally buckled, compression loaded laminate which contains either a single delamination or two symmetrically located delaminations. It is shown that, at a given applied load or displacement, significantly different values of energy release rate and mode ratio may exist in the two configurations. In general, the rate-of-increase of energy release rate with increasing displacement, as well as the percentage of crack-tip shearing mode at a given displacement, are higher in the configuration which contains two delaminations.

Journal of Composite Materials, Vol. 29, No. 6, 700-713 (1995)
DOI: 10.1177/002199839502900601


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