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An experimental investigation of the thermal expansion of a unidirectional fiber-reinforced composite material is described herein. The basic material used in the tests was a prepreg graphite-epoxy tape, designated as Modmor-II, supplied by NARMCO. Unidirectional and angel-ply laminates were made from the prepreg tape and were tested for their linear thermal expansion in the temperature range between 25 and 150 °C (77 and 302 °F). The experimental results compared reasonably well with the predicted values of the thermal expansion coefficients calculated based on several existing linear elastic micromechanics theories and lamination theories.
composite materials, thermal expansion, mechanical properties, elastic theory, laminates, fibers
Visiting professor, National Taiwan University and Chung-Shan Research Institute of Science and Technology,
Associate professor of mechanical and aerospace engineering, University of Delaware, Newark, Del.
Visiting assistant professor of civil engineering, Drexel University, Philadelphia, Pa.