Elastic-plastic properties of thin film on elastic-plastic substrates
characterized by nanoindentation test
characterized by nanoindentation test
(1. College of Packaging and Material Engineering, Hunan University of Technology, Zhuzhou 412007, China;
2. Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education,
Xiangtan University, Xiangtan 411105, China)
2. Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education,
Xiangtan University, Xiangtan 411105, China)
Abstract: To characterize the elastic-plastic properties of thin film materials on elastic-plastic substrates, a simple theory model was proposed, which included three steps: dimensionless analysis, finite element modeling and data fitting. The dimensionless analysis was applied to deriving two preliminary nondimensional relationships of the material properties, and finite element modeling and data fitting were carried out to establish their explicit forms. Numerical indentation tests were carried out to examine the effectiveness of the proposed model and the good agreement shows that the proposed theory model can be applied in practice.
Key words: elastic-plastic thin film; nanoindentation test; dimensionless analysis; finite element analysis