一方向炭素繊維強化複合材料の高温における非主軸クリープ破断挙動(OS4-5 強度,OS4 微視構造を有する材料の変形と破壊)

概要

論文の詳細を見る
Creep rupture behavior of unidirectional fiber composites T800H/Epoxy under constant stress conditions at 100℃ is examined. Tensile creep tests at three different stress levels are performed on off-axis plain coupon specimens with various fiber orientations θ=0, 10, 30, 45 and 90°. It is observed that transition creep behavior is dominant in all fiber orientations and creep-rupture takes place along reinforcing fibers regardless of the off-axis orientations. Then, a creep damage mechanics model is developed for describing the anisotropic creep rupture behavior observed. The validity of the proposed model is evaluated by comparing with experimental results. Another phenomenological model due to Dillard et al. is also tested. It is demonstrated that these models can be successfully used for adequate predictions of the off-axis creep-rupture time of the unidirectional CFRP.
2004-07-20