疲労過程におけるクリープ特性の変化を用いたCFRPの疲労寿命予測(<特集>高分子系複合材料)

概要

論文の詳細を見る
A damage criterion on CFRP under fatigue loading defined in terms viscoelasticity is proposed. In order to elucidate the change in viscoelastic property of CFRP composites under cyclic loading, due to matrix hardening, matrix crack, interface debonding and delamination, a series of creep tests was incorporated during monotonic tensile fatigue test. A generalized Voigt model was applied to describe the creep behavior of the damaged composites. By use of the increment of creep strain induced by internal damage growth, a damage variable was proposed in the framework of Kachanov-Ravotnov's classical damage theory. The evolution of the damage variable in relation to the maximum stress is discussed. Lemaitre-Chaboche's damage evolution equation was employed to estimate the fatigue life of composites successfully.
社団法人日本材料学会の論文
1996-05-15