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Mechanics in Engineering ›› 2002, Vol. 24 ›› Issue (1): 0-0.doi: 10.6052/1000-0992-2000-419

• Application study •    

THE SIMULATION OF CREEP INDENTATION TESTING

  

  • Received:2000-12-05 Revised:2001-03-19 Online:2002-02-10 Published:2002-02-10

Abstract: Finite Element Method (FEM) was used to simulate the creep indentation testing on film/substrate systems. Based on the FEM simulation, a new method is proposed to derive the material creep properties (in Norton equation) from the indention creep experimental results (indentation stress-indenter depth-time) for thin film/substrate systems by the definition of `effective' stress and `effective' strain. In the simulation, a steady state was found and the steady state was used to construct the relationship between the traditional uniaxial tensile creep testing and indentation testing. In the simulation of the creep indentation testing, FEM-results showed that the experimental results would have some error from ignoring the influence of the substrates even if the indentation depth did not exceed 5%~10% depth of film.

Key words: indentation testing, creep, finite element method, film/substrate