平織りカーボン布強化積層板の引張り荷重下における疲労損傷および破壊に関する研究

概要

論文の詳細を見る
The degradation of a plain woven carbon fiber/epoxy composite under tension-tension fatigue loading was studied in this paper. An almost flat S-N diagram was obtained for this composite. As high as 85% fatigue strength of the static strength at 10^6 cycles was recorded. The residual strength after both static and cyclic loadings is higher than the static strength. A typical S-shape stiffness reduction against logarithmic cycle number is found for the high-cycle-fatigue specimens. However, sudden fatigue death of the specimens occurs with no indications in both S-S curves and AE events. Parameters of the parabolic function which fits the convex S-S curve represent the stiffness reduction better than the observed stiffness. Microscopic examination of the fracture surface was conducted. From those observations, a fatigue damage process mode is proposed.
一般社団法人日本機械学会の論文
1993-03-25