Rate Dependence of Mode-I Interlaminar Fracture Toughness in CFRP Laminates

摘要

Measuring Mode-I interlaminar fracture toughness using a DCB specimen, we have several difficulties in measuring a crack length. In order to cope with these difficulties, we developed an electrical measuring method. This method is based on the nonlinear relationship between crack length and CFRP (Carbon Fiber Reinforced Plastics) specimen resistance. We compared this method with traditional ones of a camera and strain gages and verrified the accuracy of the electrical method.