2136 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(S27-3 複合材の長期寿命(2),S27 複合材料の加工と評価)

概要

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Off-axis creep rupture behavior of unidirectional fiber-reinforced composites (T800H/Epoxy) under constant stress conditions at different temperatures (60 and 100℃) is examined. Tensile creep tests are performed at three different stress levels on plain coupon specimens with various fiber orientations θ=0, 10, 30, 45 and 90°. The transient creep behavior is dominant regardless of the fiber orientations. The ultimate creep rupture takes place along reinforcing fibers. Similar creep rupture behaviors are observed at 60 and 100℃. A damage mechanics model is then developed to describe the anisotropic creep rupture behavior observed. The proposed model can adequately describe the off-axis creep rupture behavior of the unidirectional CFRP. It is also demonstrated that the Larson-Miller parameter can be successfully applied to the creep rupture behaviors at 60 and 100℃.
2005-09-18