Accession Number : ADA303158

Title :   Effects of Materials and Processes Defects on the Compression Properties of Advanced Composites.

Descriptive Note : Final rept. 29 Sep 80-26 Feb 82,

Corporate Author : NORTHROP CORP HAWTHORNE CA AIRCRAFT DIV

Personal Author(s) : Ramkumar, R. L. ; Grimes, G. C. ; Adams, D. F. ; Dusablon, E. G.

PDF Url : ADA303158

Report Date : MAY 1982

Pagination or Media Count : 193

Abstract : This report discusses a program that attempts to quantify the severity of materials-related or process-induced defects in As/3501-6 graphite/epoxy laminates. Emphasis is laid on porosity as the primary defect under study, though a limited number of tests on specimens with imbedded delaminations was also carried out. The primary laminate under study is a 3O-ply laminate with a layup similar to a highly-loaded portion of the F/A-l8A vertical stabilizer skin. Grimes and Adams have generated the basic properties under compressive loading situations, for defect-free AS /3501-6 laminates including some basic laminates and the 30-ply laminate. The program discussed in this report adopts the above-mentioned AS/350l-6 laminates for a test program that aims at quantifying the effect of materials- and process-induced defects. (MM)

Descriptors :   *FIGHTER AIRCRAFT, *LAMINATES, *EPOXY RESINS, *COMPRESSIVE PROPERTIES, MICROSTRUCTURE, COMPOSITE MATERIALS, FINITE ELEMENT ANALYSIS, POROSITY, VOIDS, DEFECTS(MATERIALS), QUALITY CONTROL, PREPREGS, FAILURE(MECHANICS), DELAMINATION, STATIC TESTS, FATIGUE TESTS(MECHANICS), PLASTIC FLOW, GRAPHITE EPOXY COMPOSITES, VERTICAL STABILIZERS.

Subject Categories : Attack and Fighter Aircraft
      Laminates and Composite Materials
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE