Accession Number : ADA305801
Title : Effect of Matrix Resin on the Impact Fracture Characteristics of Graphite-Epoxy Laminates.
Descriptive Note : Final rept.,
Corporate Author : BOEING COMMERCIAL AIRPLANE CO SEATTLE WA
Personal Author(s) : Hertzberg, P. E. ; Smith, B. W. ; Miller, A. G.
PDF Url : ADA305801
Report Date : JAN 1982
Pagination or Media Count : 133
Abstract : This report presents the results of an investigation into the effect of resin chemistry on basic impact-energy-absorbent mechanisms exhibited by graphite-epoxy composites. Impact fracture modes and microscopic resin deformation characteristics were examined for 26 NASA-impacted graphite-epoxy laminates with different resin chemistries. Discrete specimen fracture modes were identified through cross-sectional examination after impact and subsequently compared with measured glass transition temperatures, cure cycles, and residual impact capabilities. Details of microscopic resin deformation mechanisms and their overall relationship to impact loading conditions, voids, and resin content also were characterized through detailed scanning electron microscopic examination of separated fracture surfaces. (MM)
Descriptors : *IMPACT STRENGTH, *EPOXY LAMINATES, *EPOXY RESINS, *GRAPHITE EPOXY COMPOSITES, COMPRESSION, POLYMERS, COMPOSITE MATERIALS, DEFORMATION, FIBER REINFORCED COMPOSITES, ELASTOMERS, TOUGHNESS, MATRIX MATERIALS, GLASS, FRACTURE(MECHANICS), CRACK PROPAGATION, TRANSITION TEMPERATURE, FAILURE(MECHANICS), DELAMINATION.
Subject Categories : Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE