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Enhanced Spherical Indentation Techniques for Property Evaluation

향상된 구형 압입 물성평가법

  • 이형일 (서강대학교 기계공학과) ;
  • 이진행 (서강대학교 대학원 기계공학과)
  • Published : 2007.04.01

Abstract

In this work, indentation theory of Lee $et al.^{(1)}$ for 6% indentation of indenter diameter is extended to an indentation theory for 20% indentation. For shallow indentation, the effect of friction on load-depth curve is negligible, but different materials can show nearly identical load-depth curves. On the basis of this observation, a new numerical approach to deep indentation techniques is proposed by examining the finite element solutions. With this new approach, from the load-depth curve, we obtain stress-strain curve and the values of Young's modulus, yield strength and strain-hardening exponent with an average error of less than 3%.

Keywords

Indentation;FEA;Material Property

References

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Cited by

  1. A Dual Triangular Pyramidal Indentation Technique Based on FEA Solutions for Material Property Evaluation vol.36, pp.1, 2012, https://doi.org/10.3795/KSME-A.2012.36.1.017
  2. A Conical Indentation Technique Based on FEA Solutions for Property Evaluation vol.33, pp.9, 2009, https://doi.org/10.3795/KSME-A.2009.33.9.859