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

The Korean Society of Mechanical Engineers (대한기계학회)
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Estimation of Measurement Uncertainty in Evaluation of Tensile Properties

인장 물성 측정 불확도 평가

  • Huh, Y.H. (Div. of Industrial Metrology, Standard. Korea Standard Research Institute of Standards and Science) ;
  • Lee, H.M. (Div. of Industrial Metrology, Standard. Korea Standard Research Institute of Standards and Science) ;
  • Kim, D.J. (Div. of Industrial Metrology, Standard. Korea Standard Research Institute of Standards and Science) ;
  • Park, J.S. (Div. of Industrial Metrology, Standard. Korea Standard Research Institute of Standards and Science)
  • 허용학 (한국표준과학연구원 산업측정표준본부) ;
  • 이해무 (한국표준과학연구원 산업측정표준본부) ;
  • 김동진 (한국표준과학연구원 산업측정표준본부) ;
  • 박종서 (한국표준과학연구원 산업측정표준본부)
  • Published : 2010.01.01
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Abstract

Estimation of tensile properties measurement uncertainty of material was carried out. Sources of uncertainty affecting the measurement of tensile properties were classified and analyzed. The models for uncertainty evaluation of measurands to be determined from tensile test, such as elastic modulus, yield strength and tensile strength, were suggested and derived from the mathematical relations, corresponding to the respective measurands, and the measuring quantities by calculating each sensitivity coefficient of the quantities. Based on these models, the uncertainty of the tensile properties was evaluated from the experimental data of SUS316LN determined according to ISO 6892.

재료의 인장 물성 측정 불확도 평가가 수행되었다. 인장 물성 측정에 영향을 주는 불확도의 요인이 구분되어 분석되었고 인장 시험으로부터 측정되는 측정량, 즉 탄성계수, 항복 강도 그리고 인장 강도의 불확도 평가 모델이 본 연구에서 제시되었고 각 측정량에 대한 대응하는 수학적 모델과 측정치로부터 각 측정치의 감도계수를 계산함으로서 유도 되었다. 각 모델에 근거하여 ISO 6892에 따라 결정되는 SUS316LN의 실험적 데이터로부터 인장 물성의 불확도가 평가되었다.

Keywords

References

  1. Kandil, F. A., 1995 "Measurement Good Practice Guide No. 1" NPL, ISSN 1368-6550, MMS 001:1995
  2. Kandil, F. A., 2003, "Verification of Alignment of Uniaxial Test Systems", VAMAS Report No. 42, ISSN 1016-2186, NPL
  3. ISO/TC164/SC5/WG11 WD "Alignment of Fatigue Testing Machines."
  4. ASTM E8M, Standard Test Methods for Tension Testing of Metallic Materials [Metric]
  5. ISO 6892:1998 Metallic materials -- Tensile testing at ambient temperature
  6. BIPM/IEC/IFCC/ISO/IUPAC/IUPAP/OIML, Guide to the Expression of Uncertainty in Measurement, 1993
  7. Silva, L.R.O., 2004, "Evaluation of the Uncertainty of Measurement Properties on the Tensile Testing," Simposio de Metrologíia 2004 pp. 1-5

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