Accession Number : ADA329883

Title :   Biaxial Failure Analysis of Graphite Reinforced Polyimide Composites

Descriptive Note : Final rept. 15 Mar 95-30 May 96

Corporate Author : OREGON GRADUATE INST BEAVERTON DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Kumosa, Maciej S. ; Searles, Kevin H. ; Odegard, Greg ; Thirumalai, V.

PDF Url : ADA329883

Report Date : 15 NOV 1996

Pagination or Media Count : 12

Abstract : Three issues have been addressed in this report. Firstly, the biaxial shear dominated failure properties of graphite/polymid fabric composites have been investigated at room temperature using the biaxial Iosipescu method. Secondly, a new testing procedure has been suggested for evaluating micro-damage in polymer matrix composites. Using this method, three-dimensional failure characteristics of damage generated in the graphite/polymid Iosipescu specimens can be determined for various loading conditions. Finally, non-linear finite element computations of internal stresses in the Iosipescu specimens have been performed taking into account the effect of specimen sliding within the Iosipescu fixture.

Descriptors :   *FAILURE(MECHANICS), FINITE ELEMENT ANALYSIS, FIBER REINFORCED COMPOSITES, THREE DIMENSIONAL, NONLINEAR ANALYSIS, BIAXIAL STRESSES, GRAPHITED MATERIALS, POLYIMIDE RESINS.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE