Fatigue Damage in Notched, Glass-Epoxy Sheet.
WATERVLIET ARSENAL N Y
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This paper reports the results of an experimental study of the fatigue damage originating from a notch in laminated, glass-epoxy panels subjected to cyclic tension loading. The mechanism of fatigue damage consists of the formation of a region of delamination ahead of the notch. The rate of growth of this zone is a function of the maximum stress intensity factor at the notch tip and an inverse function of the number of cycles. The effects of notch depth, notch root radius, fiber orientation, cyclic frequency and of overloads prior to fatigue cycling were investigated. The residual strength of the panels after fatigue cycling was also determined.
- Laminates and Composite Materials