Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
In the present study, interlayer strength of Carbon fiber reinforced plastic (CFRP) is evaluated by using laser ultrasonic waves and a wave propagation analysis. The laser spallation technique of various laser irradiation has been used to induce interlayer delamination of specimens. The interlayer stress is estimated by an inverse analysis using the displacement at a back surface of a specimen and the impulse response calculated by a finite element analysis. In addition, interfacial strength between carbon fiber and matrix resin in CFRP laminates is evaluated by the homogenization theory. In order to estimate the interfacial strength, macroscopic stress at the place where fiber/matrix interfacial failure occurred is calculated by the inverse analysis using a finite element method, and localized analysis by a homogenization method is performed to evaluate the interfacial stress between fiber and matrix.
