Fatigue life reduction of GFRP composites due to delamination associated with the introduction of functional discontinuities

Abstract

This paper reports on an experimental investigation into the fatigue life of Glass Fibre Reinforced Polymer (GFRP) when essential design discontinuities are introduced to a GFRP part to enable correct function. Specifically, the impact of high speed drilled holes on fatigue life is investigated. Fatigue life is a critical mechanical property, in particular, for industrial applications where both minimal weight and high reliability are sought. The paper investigates the impact of high speed drilling parameters on the delamination created around the hole, and subsequently on the static strength and fatigue life of GFRP composite laminates. Delamination damage in GFRP specimens is monitored usi..