In the temperature range from room temperature to the glass-transition point (T
g) of matrix, elastic moduli of CFRP-UD composites, CFRP-FW cylinders and Epoxy resin are measured. An electro-optical extensometer, Zimmer model 200 X, is used in these experiments. Experimental results of E
x are compared with the numerical results by the authors' computer program based on measured data for Epoxy and an agreement is very good. Temperature dependency of E
x is directly influenced by that of E
m, but E
z is almost independent of E
m. It should be noted that ν
m has considerable effect on E
x, particularly at near T
g point. Curing temperature history changes trends of temperature dependency of E
m at most Epoxy.
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