Accession Number : ADA194880

Title :   Damage Initiation in the Short Beam Shear Test of Composite Materials Using Stiffness Reduction.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Dupont, Dean T

PDF Url : ADA194880

Report Date : Jun 1988

Pagination or Media Count : 102

Abstract : The purpose of this study was to analyze damage initiation in the short beam shear test for composite materials. This thesis proposes a means of predicting damage initiation in a composite beam using finite element techniques and a continuum mechanics failure criteria. The first objective was to accurately determine the stress field. The second objective was to employ a damage criteria based on the elemental stress field. The final objective was to evaluate the effectiveness of using an elemental stiffness reduction to study damage initiation and progression. The finite element code used was NOSAPM. Keywords: Composite materials, Shear test, Stiffness reduction, Damage initiation, Finite elements.

Descriptors :   *COMPOSITE MATERIALS, *DAMAGE, *FINITE ELEMENT ANALYSIS, *SHEAR TESTS, BEAMS(STRUCTURAL), COMPOSITE STRUCTURES, CONTINUUM MECHANICS, FAILURE, SHORT RANGE(TIME), STIFFNESS, STRESSES, FAILURE(MECHANICS), MODEL TESTS, AIRFRAMES, SHEAR TESTS, EXPERIMENTAL DESIGN, STEEL, ALLOYS, THESES, ANISOTROPY

Subject Categories : Laminates and Composite Materials
      Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE