高温環境下におけるCFRP積層板の衝撃損傷

概要

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In the present study, impact damage in CFRP laminates under high temperature is considered through experimentation. For carbon fiber/epoxy (type A) and carbon fiber/PEEK (type P) laminates having the stacking sequence [0°/90°]_<SYM>, the impact damage is generated under environments from room temperature to 150℃, by the collision of a steel ball launched from an air gun. The total area of delamination is proportional to impact energy for both laminates. When the environmental temperatures are higher, critical energies of generating delaminations are larger for type A specimens and constant for type P specimens, though energies of developing delaminations are constant up to the glass transition temperature for type A specimens, and lower for type P specimens. Residual strengths of impacted specimens are estimated by static three-point bending test. It is shown that the residual strengths are reduced with decreasing total area of delamination.
1994-03-25