Hygrothermal Aging Effect on the Interlaminar Fracture of Woven Fabric Fibre/ PEI Composite Material

This paper deals with the experimental mechanical properties characterization of three types of woven fabric composites taking into account the effect of the hygrothermal aging.The characterization was carried out using mode I (DCB) and mode II (ENF) interlaminar fracture tests in order to determine the loss of crack propagation resistance.The materials used were two types of woven (2/2 Twill, 8 Harness Satin) glass fiber, and 8 Harness Satin carbon fiber in a polyetherimide (PEI) matrix.The critical values of the energy release rate in modes I and II were calculated using the Corrected Beam theory.The material reinforced with 8 Harness Satin glass fibre had the highest mode I and mode II fracture toughness.Also, the variations of the delamination energies G ic and Gn c with the time of exposure to severe hygrothermal aging (70°C and 95% RH) were obtained.The decrease in the fracture behaviour was more important in the case of 2/2 Twill weave reinforced material.

Abstract licence: CC BY

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