1983 Volume 2 Pages 71-79
The dependences of temperature on transverse low cycle fatigue strength of CFRP are presented in this paper, where the experimental results of low cycle fatigue were shown at various temperatures for unidirectional CFRP and epoxy resin. The results obtained are summarized as follows: (1) The transverse low cycle fatigue strength of CFRP showed remarkable dependence on temperature in the same manner as the low cycle fatigue strength of the matrix. (2) The low cycle fatigue strength FF(Nf,T) of CFRP and the matrix against the number of cycle to failure Nf at various temperatures T can be estimated by FF(Nf,T)=[Fs(T)] mean・ {1-α(T)logNf} where, [Fs(T)] mean is the mean value of static strength. The factor α(T) of the CFRP are in good agreement with that of the matrix. (3) It is recognized from the experiment that the mechanical property of CFRP in the cyclic load condition has a analogy to the viscoelastic behaviors of epoxy resin used as the matrix at T=140℃and 160℃.
