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An Indentation Theory Based on FEA Solutions for Property Evaluation

유한요소해에 기초한 물성평가 압입이론

  • Published : 2001.11.01

Abstract

A novel indentation theory is proposed by examining the data from the incremental plasticity theory based finite element analyses. First the optimal data acquisition location is selected, where the strain gradient is the least and the effect of friction is negligible. This data acquisition point increases the strain range by a factor of five. Numerical regressions of obtained data exhibit that strain hardening exponent and yield strain are the two main parameters which govern the subindenter deformation characteristics. The new indentation theory successfully provides the stress-strain curve with an average error less than 5%.

Keywords

Spherical Indenter;Effective Stress-strain Curve;Optimal Data Acquisition Location;Constraint Factor;Strain-hardening Exponent;Yield Strain;FEM;Deformation and Incremental Plasticity Theory

References

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