In order to determine the nature of failure mechanisms a number of fatigue tests were performed. The test specimens partly have artificial delaminations between different layers of the multidirectional laminates made from T30/914C prepregs. For better understanding of the strength degradation in fatigue a damage model, based on the delimination propagation, starting from the free edges between the plies of a multidirectional laminate, has been developed. These defects propagate due to interlaminar stresses up to an area, which is critical in the case of tension-compression fatigue against buckling or shearing of parts of the delaminated test specimen.
Growth of delaminations under fatigue loading
Ausbreitung von Schichtabloesungen und schwingender Belastung
1983
27 Seiten, 32 Bilder, 17 Quellen
Conference paper
English
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