Accession Number : ADA304651

Title :   The Construction and Use of Toughness Maps in a Fracture Analysis of the Micromechanics of a Composite Failure.

Corporate Author : CAMBRIDGE UNIV (UNITED KINGDOM) DEPT OF ENGINEERING

Personal Author(s) : Wells, J. K. ; Beaumont, P. W.

PDF Url : ADA304651

Report Date : FEB 1981

Pagination or Media Count : 28

Abstract : Analytical expressions are presented which predict the debonding and pull-out lengths observed in brittle fibre composites. These characteristic lengths are combined with models of four toughening mechanisms to calculate the work of fracture of a composite. The results are presented as maps showing not only contours of toughness but also the dominant toughening micromechanism. The toughness is largely determined by six material parameters, each map demonstrating the combined effect of changing two of these simultaneously. Maps are presented for glass-fibres in epoxy and carbon-fibres in epoxy. Their use is demonstrated by showing the effects of hygrothermal aging on the toughness of the composites. (MM)

Descriptors :   *FIBER REINFORCED COMPOSITES, TOUGHNESS, FRACTURE(MECHANICS), BRITTLENESS, FAILURE(MECHANICS), MICROMECHANICS.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE