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Title: Failure modes and durability of kevlar/epoxy composites

The fracture topographies of Kevlar 49/epoxy composite strands and multilayer composites in the form of pressure vessels are discussed in terms of the microscopic deformation and failure processes of the composites. The effect of resin ductility and fiber-matrix interfacial bond strength on mechanisms of fiber damage are considered. The failure of the Kevlar 49 fibers by a splitting process and the parameters, such as fiber fibrillation and macromolecular chain scission, that control such a process are discussed in relation to fiber and composite performance.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
5809228
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: SAMPE Q.; (United States); Journal Volume: 12:3
Research Org:
Lawrence Livermore National Lab., CA
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; FAILURES; PRESSURE VESSELS; ARAMIDS; EPOXIDES; FIBERS; FRACTURE PROPERTIES; INTERFACES; MICROSTRUCTURE; SCANNING ELECTRON MICROSCOPY; CONTAINERS; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; MATERIALS; MECHANICAL PROPERTIES; MICROSCOPY; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; SYNTHETIC MATERIALS 360303* -- Composite Materials-- Mechanical Properties-- (-1987)