Development of new elastic constant estimation method using laser ultrasonic visualization testing

摘要

This paper presents a new elastic constant estimation method using the laser ultrasonic visualization testing for anisotropic elastic solids such as CFRP (Carbon Fiber Reinforced Plastics). In this paper, first, EFIT (Elastodynamic Finite Integration Technique) formulations for general anisotropic elastodynamics are described. Next, the procedure of our developed elastic constant estimation method is described with anisotropic elastodynamic theory. As numerical examples, elastic constants of a CFRP specimen are predicted by the proposed method. In addition, simulation of ultrasonic wave propagation in the CFRP with estimated elastic constants is implemented by using the EFIT and the results are compared with those obtained by the laser ultrasonic visualization testing to validate our proposed method.