119202 自緊処理を施したCFRP複合圧力容器の耐久性評価(OS06 高分子材料および高分子系複合材料,オーガナイズド・セッション)

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  • 119202 Durability of CFRP Composite Vessels with Autofrettage

説明

It is known that fatigue life of CFRP composite vessels are seriously reduced by out-of-plane loading. For the improvement of the fatigue life autofrettage treatment is conducted on composite vessels. The objective of this study is to evaluate effects of autofrettage on durability subjected to impact loading. Composite vessels used in this study were made of carbon/epoxy and aluminium liner. Impact tests and damage observation were performed on the composite vessels with and without autofrettage. Tensile fatigue test were also conducted on the specimen simulated as a composite vessels after impact tests, to investigate damage behavior and fatigue life. As a result, absorbed energy of composite vessels with autofrettage became smaller than composite vessels without autofrettage. In composite vessels with autofrettage, delamination was suppressed, and fatigue life became longer. It was clarified that CFRP composite vessels with autofrettage were superior in the impact resistance.

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