Abstract
Nanoindentation technology has many advantages in the acquisition of elastoplastic properties of certain small-scale materials (coatings, films, etc.) due to its small size and non-destructive properties. However, because of the microscopic scale involved, test results are also more susceptible to disturbances by internal residual stress of the specimen. To address these issues, this paper develops a co-simulation method for combining the optimization algorithm with finite element simulation in order to obtain the true elastoplastic properties of unknown materials using nanoindentation testing. This method is suitable for any surface treated materials, and the reliability of the method is also verified by the case of laminar plasma quenched rail.
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