The Effect of Environment on the Mechanical Behavior of AS/3501-6 Graphite/Epoxy Material
Final rept. Aug 1981-Nov 1982 on Phase 4
VOUGHT CORP ADVANCED TECHNOLOGY CENTER DALLAS TX
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The effect of temperature and moisture on the fatigue properties of AS3501-6 composite was investigated. Micromechanics was used to relate the composites compliance to the matrices compliance. The stress state of the laminate was studied by using Tsai-Wu quadratic failure criterion through uniaxial specimen testings. Intralaminar cracks and delaminations were studied by testing or - 45902s layup specimens. A laminate analysis method was used to evaluate the energy release rate of the or - 45902s specimens. Results indicate that predicted critical strains are above those for which specimens begin to exhibit noticeable softening due to damage. To improve fatigue failure prediction behavior intraply microcracking must be accounted for in the theoretical model.
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods