Identifying the Mechanical Parameters of Hard Coating with Strain Dependent Characteristic by an Inverse Method

TLDR: In this article, a hard-coating cantilever thin plate under base excitation was taken as the research object, and an inverse method was developed to identify storage modulus and loss factor of hard coating.

Abstract: The mechanical parameters of hard coating, such as storage modulus and loss factor, are affected by preparation technology significantly and have the strain dependent characteristic. So the effective identification of these mechanical parameters becomes a challenge task. In this study, a hard-coating cantilever thin plate under base excitation was taken as the research object, and an inverse method was developed to identify these mechanical parameters. Firstly, the principles of identifying storage modulus and loss factor of hard coating were presented according to the inverse method. Then, from the need of parameters identification, the analytical model and calculation formula of equivalent strain for the hard-coating composite plate were derived. Next, also for parameter identification, the vibration experiments about the cantilever plate coated with NiCoCrAlY