1440 平織CFRP積層板の高温における非主軸クリープ破断強度(S06-2 複合材料の動向とその加工技術II,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Off-axis creep rupture behavior of plain woven CFRP laminates under constant tensile and compressive load conditions at 100℃ was examined, and phenomenological modeling of off-axis creep rupture strength was attempted. First, static tension and compression tests were performed on coupon specimens with five different fiber orientations to examine the fiber orientation dependence of off-axis stress-strain relationship. Then, off-axis creep rupture tests in tension and compression were performed for the five fiber orientations at more than three stress levels, respectively. Test results showed that transient creep behavior was dominant until final rupture, regardless of fiber orientation and of loading direction. The log-log plots of creep stress against the time to rupture were almost linear over the tested range of lifetime for both in tension and compression. On the basis of these creep rupture data, a phenomenological creep rupture model was developed on the basis of continuum damage mechanics. It was elucidated that the creep rupture model succeeded in adequately predicting the observed off-axis creep rupture behavior of the material.
一般社団法人日本機械学会の論文
2008-08-02