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Software and Hardware Development of Micro-indenter for Material Property Evaluation of Hyper-Elastic Rubber

초탄성고무 물성평가용 미소압입시험기의 소프트웨어 및 하드웨어 개발

  • 이형일 (서강대학교 기계공학과) ;
  • 김동욱 (현대엔지니어링) ;
  • 이진행 (서강대학교 대학원 기계공학) ;
  • 남승훈 (한국표준과학연구원 강도평가그룹)
  • Published : 2004.06.01

Abstract

In this work, effects of hyper-elastic rubber material properties on the indentation load-deflection curve and subindenter deformation are examined via finite element (FE) analyses. An optimal location for data analysis is selected, which features maximum strain energy density and negligible frictional effect. We then contrive two normalized functions, which map an indentation load vs. deflection curve into a strain energy density vs. first invariant curve. From the strain energy density vs. first invariant curve, we can extract the rubber material properties. This new spherical indentation approach produces the rubber material properties in a manner more effective than the common uniaxial tensile/com-pression tests. The indentation approach successfully measures the rubber material properties and the corresponding nominal stress-strain curve with an average error less than 3%.

Keywords

Hyper-Elastic Rubber;Spherical Indenter;Material Property;Strain Energy Density;Invariant of Principal Stretches

References

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Cited by

  1. A spherical indentation technique for property evaluation of hyperelastic rubber vol.27, pp.20, 2012, https://doi.org/10.1557/jmr.2012.241
  2. Transient Creep Analysis in Indentation Tests vol.36, pp.1, 2012, https://doi.org/10.3795/KSME-A.2012.36.1.081