Effects of Static Tensile Load on the Thermal Expansion of Gr/PI Composite Material.
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER
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The effect of static tensile load on the thermal expansion of GrPI composite material was measured for seven different laminate configurations. A computer program was developed which implements laminate theory in a piecewise linear fashion to predict the coupled nonlinear thermomechanical behavior. Static tensile load significantly affected the thermal expansion characteristics of the laminates tested. This effect is attributed to a fiber-instability micromechanical behavior of the constituent materials. Analytical results correlated reasonably well with free thermal expansion tests no load applied to the specimen. However, correlation was poor for tests with an applied load. Author
- Laminates and Composite Materials