Accession Number : ADA303068

Title :   Failure of Fibrous Composites. Part 1: Stress Concentrations, Cracks and Notches. Part 2: Toughness,

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

Personal Author(s) : Beaumont, Peter W.

PDF Url : ADA303068

Report Date : 1981

Pagination or Media Count : 19

Abstract : A fibrous composite containing a notch or hole in monotonic loading exhibits premature cracking at stresses significantly lower than the ultimate strength; interfacial shear cracking, delamination or splitting, fibre fracture, matrix cracking and so forth. The formation of a damaged region is due to the concentration of localized tensile and shear stresses close to the noton front. The precise mode of failure depends upon the orientation of fibres and stacking geometry of the laminate; it is also sensitive to the properties of the matrix and fibre-matrix interface; and to the stress-state and environment. The article surveys the micromechanisms of crack extension in various classes of fibrous composites and includes models to account for the origins of toughness. (MM)

Descriptors :   *FIBER REINFORCED COMPOSITES, *TOUGHNESS, FOREIGN TECHNOLOGY, COMPOSITE MATERIALS, LAMINATES, TENSILE STRESS, CRACKING(FRACTURING), CRACKS, MATRIX MATERIALS, FRACTURE(MECHANICS), SHEAR STRESSES, FAILURE(MECHANICS), NOTCH TOUGHNESS, STRESS CONCENTRATION.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE