Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Determination of Mechanical Properties of Galvanized Steel Sheets Using Instrumented Indentation Technique and Finite Element Analysis

계장화 압입시험 및 유한요소해석을 이용한 아연도금강판의 기계적 물성 추정

  • Jin, Ji-Won (School of Mechanical Engineering, College of Engineering, Kunsan Nat'l Univ.) ;
  • Kwak, Sung-Jong (School of Mechanical Engineering, College of Engineering, Kunsan Nat'l Univ.) ;
  • Kim, Tae-Seong (Production Engineering Center, CAE Technology Group, LS Cable Ltd.) ;
  • Noh, Ki-Han (Body & Chassis System Research Center, Intelligent Vehicle Technology R&D Division, KATECH) ;
  • Kang, Ki-Weon (School of Mechanical Engineering, College of Engineering, Kunsan Nat'l Univ.)
  • Received : 2011.12.21
  • Accepted : 2012.03.05
  • Published : 2012.05.01
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Abstract

This paper deals with the determination of mechanical properties of various galvanized steel sheets that are used for fabricating automobile bodies; the instrumented indentation technique and finite element analysis were used for the determination. First, tensile tests were conducted to obtain the true stress-true strain curves of galvanized steel sheets with various thicknesses. Load-deformation curves were then obtained by using the instrumented indentation testing machine, and they were compared with load-deformation curves obtained by finite element analysis. Further, true stress-true strain curves were obtained at the optimal observation point by finite element analysis.

본 논문의 목적은 계장화 압입시험과 유한요소해석을 이용하여 아연도금강판의 기계적 물성을 추정하는 것이다. 먼저 인장시험을 통하여 유한요소해석에 요구되는 두께에 따른 아연도금강판의 기계적 물성을 획득하였으며, 이를 이용하여 유한요소해석을 수행하여 특정지점에서의 소성 응력 및 변형률을 획득하였다. 이러한 유한요소해석의 유효성은 계장화 압입시험의 하중-변위선도와 비교를 통하여 검토하였다. 유한요소해석을 통하여 구한 진응력-진변형률 곡선을 인장시험 결과와 비교하여 이의 정확성을 검증하였으며 또한 이를 바탕으로 대표 응력 및 변형률 산출지점을 재평가하였다.

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References

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