CFRP積層板の衝撃損傷に及ぼす温度の影響

概要

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In the present study, the influence of temperature on impact damage in carbon fiber reinforced plastic (CFRP) laminates was investigated experimentally. Carbon fiber/epoxy, carbon fiber/toughened epoxy and carbon fiber/PEEK having a stacking sequence [0^0_n/90^0_n]_SYM were used as specimens. Damage was generated by the collision of a steel ball under temperature conditions ranging from -30℃ to 180℃. Delamination areas in the specimens were measured using an ultrasonic microscope and the surfaces of the delamination were observed by SEM. The results revealed the total delamination areas to be proportional to the impact energies for all specimens except for the specimens suffering impact damage at low temperature, and the delamination areas decreased with increasing temperature. The development of the delamination area can be explained in terms of the thermo-viscoelastic behavior of CFRP. Shear deformation between the layers increases with increasing temperature prior to the generation of damage, since the length of hackles on the delamination increases with temperature.
社団法人日本機械学会の論文
1997-03-25