911 クロスプライCFRP積層板の非主軸クリープ強度とその温度依存性(OS9-(3)オーガナイズドセッション《複合材料の変形と破壊およびマルチスケール計算技術》)

概要

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Off-axis creep rupture behavior of a cross-ply carbon/epoxy T700S/Epoxy laminate has been studied under constant loading conditions at different temperatures. Experimental results showed that the tensile creep rupture of off-axis specimens takes place predominantly along reinforcing fibers in a brittle manner, regardless of fiber orientation and temperature. It was also observed that the log-log plots of tensile creep rupture data can approximately be described using straight lines with negative slopes over the range of rupture time up to 10h, regardless of fiber orientation and test temperature. In what follows, a simple phenomenological model based on a master curve for creep rupture was developed for predicting the time-to-failure of orthotropic composites for any fiber orientation and temperature. It was demonstrated that the off-axis creep rupture life of cross-ply composite laminate is adequately predicted using the proposed model, regardless of fiber orientation and test temperature.
2011-08-26