The intralaminar fracture toughness of a unidirectionally reinforced glass/epoxy composite is determined experimentally at several mode I and mode II loading ratios. The crack propagation criterion, expressed as a quadratic form in terms of single-mode stress intensity factors (alternatively, linear in terms of energy release rates), approximates the test results reasonably well. The mixed-mode cracking criterion obtained is used to predict the intralaminar crack on set in a cross-ply glass/epoxy composite under off-axis tensile loading.
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 44, No. 6, pp. 785–794, November–December, 2008.
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Andersons, J., Spārniņš, E. & Joffe, R. The onset of mixed-mode intralaminar cracking in a cross-ply composite laminate. Mech Compos Mater 44, 549–556 (2008). https://doi.org/10.1007/s11029-009-9055-z
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DOI: https://doi.org/10.1007/s11029-009-9055-z