A Plate with Orthotropic Damages: Dynamics and Damage Identification

초록

The line crack-like damage generated within a small material volume may change the material behavior of the material volume from initially isotropic to effec-tively orthotropic, depending on damage orientation. Motivated from this observation, this paper develops a new damage identification theory to identify the locations, severities, and orientations of local dam-ages, all together at a time, by using the frequency response functions measured from damaged plate. The effects of damage orientation on the vibration responses of a plate are numerically investigated, and the numerically simulated damage identification tests are conducted to verify the present damage identifi-cation theory.