Property Evaluation Method Using Spherical Indentation for High-Yield Strength Materials

고강도 재료에 대한 구형압입 물성평가법

  • Choi, Youngsick (Dept. of Mechanical Engineering, Sogang Univ.) ;
  • Marimuthu, Karuppasamy Pandian (Dept. of Mechanical Engineering, Sogang Univ.) ;
  • Lee, Jin Haeng (Reactor Mechanical Engineering Division, Korea Atomic Energy Research Institute) ;
  • Lee, Hyungyil (Dept. of Mechanical Engineering, Sogang Univ.)
  • Received : 2014.10.22
  • Accepted : 2015.06.01
  • Published : 2015.11.01


In this paper, we propose a method to evaluate the material properties of high-yield strength materials exceeding 10GPa from spherical indentation. Using a regression equation considering four indentation variables, we map the load displacement relation into a stress-strain relation. To calculate the properties of high-strength materials, we then write a program that produces material properties using the loading / unloading data from the indentation test. The errors in material properties computed by the program are within 0.3, 0.8, and 6.4 for the elastic modulus, yield strength, and hardening coefficient, respectively.


Spherical Indentation;FEA;Reverse Analysis;High Strength Material;Material Property;Load-depth Curve;Stress-strain Curve


Supported by : 한국연구재단


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