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Correction of constraint loss in fracture toughness measurement of PCVN specimens based on fracture toughness diagram

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Abstract

The aim of this paper is to suggest an approach to generate master curves by using miniature specimens, especially pre-cracked Charpy V-notched (PCVN) specimen, made of SA508 carbon steel. Firstly, fracture toughness diagram is derived from comparing finite element analyses results with the fixed mesh size at crack tip between standard compact tension and PCVN specimens. To compensate the constraint effects from different geometry, further examination based on the fracture toughness diagram was performed. In this context, a scale factor to deal with specimen size effects is proposed by statistically manipulating the numerical analysis data. Finally, the proposed scale factor is applied to calculate reference temperature which affects on the master curve. We expect that the approach can be applicable to compensate the geometrical constraint effects on fracture toughness of SA508 carbon steel when the PCVN specimen is used.

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Authors and Affiliations

  1. School of Mechanical Engineering, Sungkyunkwan Univ., 300 Chunchun-dong, Jangan, Suwon, Kyonggi, 440-746, Korea

    Shin-Beom Choi & Young-Jin Kim

  2. Department of Nuclear Engineering, Kyung Hee University, 1 Seocheon-dong, Giheung, Yongin, Kyonggi, 446-701, Korea

    Yoon-Suk Chang

  3. Nuclear Material Technology Division, Korea Atomic Energy Research Institute, 150 Dukjin-dong, Yuseong, Daejon, 305-330, Korea

    Min-Chul Kim & Bong-Sang Lee

Authors
  1. Shin-Beom Choi
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  2. Yoon-Suk Chang
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  3. Young-Jin Kim
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  4. Min-Chul Kim
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  5. Bong-Sang Lee
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Corresponding author

Correspondence to Young-Jin Kim.

Additional information

This paper was recommended for publication in revised form by Associate Editor Youngseog Lee

Shin-Beom Choi received his B.S. and M.S. in the school of Mechanical Engineering from Sungkyunkwan University, Korea, in 2006 and 2008, respectively. He is currently a Ph.D. Candidate in Sungkyunkwan University. His research interests include computational mechanics and fracture mechanics.

Young-Jin Kim received his Ph.D. from the Department of Mechanical Engineering in 1982 at University of Manitoba in Canada. Currently, he is a Professor in the School of Mechanical Engineering at Sungkyunkwan University. He is also director at Safety and Structural Integrity (SAFE) Research Center in Sungkyunkwan University. His current research interests are fracture mechanics and nano mechanics.

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Choi, SB., Chang, YS., Kim, YJ. et al. Correction of constraint loss in fracture toughness measurement of PCVN specimens based on fracture toughness diagram. J Mech Sci Technol 24, 687–692 (2010). https://doi.org/10.1007/s12206-010-0120-2

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  • DOI: https://doi.org/10.1007/s12206-010-0120-2

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