複合材料円孔周辺部層間剥離の進展挙動

抄録

Interlaminar delamination at edge of circular hole is most important to care in design of composite material structures among many kinds of defect damaged in the machining holes. Following five items are described in this paper. (1) Experiment conducted with three kinds of CFRP (P3060, P2190, APC-2) to get data of delamination growth and of residual strength, (2) An improvement on delamination growth law to give a better correlation between experimental data and estimated results, (3) The upper limit, unexpectedly very high, of load under that delamination does not grow, (4) Confirmation of an analytic method of residual strength on the assumption that Euler buckling occurs in an outer delaminated laminate and (5) Considarations to damage tolerance design of composite material structures.