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Abstract

This paper reports on the fatigue behaviour of surface–cracked glass/polyester composite plates. The machined cracks have various aspect ratios (a/c) and depth ratios (a/t). The propagation behaviour of surface cracks and delamination are investigated under constant-amplitude (R = 0) loading. The stress intensity factor, K_I, is obtained using Newman–Raju and Paris and Sih equations, while K_del is determined using equations given by Suo and Hutchinson and Bao et al. The results were plotted as curves of the typical relationship between the crack growth rate (dc/dN) and the stress intensity factor range (ΔK_I) and the delamination propagation rate (db/dN) and the delamination stress intensity factor range (ΔK_del). Material constants A and n were obtained according to the Paris–Erdoğan equation.

Keywords

Tension fatigue surface crack glass reinforced plastics crack propagation rate delamination stress intensity factor

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Fatigue behaviour of surface–cracked glass/polyester composite plates

Abstract

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References