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

  • 제30권6호
  • /
  • Pages.637-642
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  • 2006
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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연성 금속의 파괴과정에서 발생하는 소성영역의 현장 측정

In-situ Measurement of Plastic Zone Developed During Ductile Fracture Process

  • 백정현 (전남대학교 대학원 기계공학과) ;
  • 김도형 (전남대학교 대학원 기계공학과) ;
  • 강기주 (전남대학교 공과대학 기계시스템공학부)
  • 발행 : 2006.06.01
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초록

A plastic zone size is regarded as a measure of material resistance, and also it determines the fracture behavior. The importance of estimating or measuring the plastic zone size cannot be too emphasized. In this article, SDSP(Stereo Digital Speckle Photography) is examined as a new techniques to measure the plastic zone developed in a ductile metal. This technique is simple, vibration free and non-contact, and measures simultaneously in-plane displacements as well as out-of plane displacements like the side necking. Experimental results for a CT specimen are presented to demonstrate the accuracy in comparison with those obtained by recrystallization technique and finite element analysis.

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참고문헌

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  2. Shoji, T. 1981, 'Deformation of Crack Tip Energy Dissipation and Elastic-Plastic Toughness Parameter with Ductile Crack Extension,' Journal of Testing and Evaluation, Vol. 6, pp.324-334
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  7. Lee, J.H., Kang, K.J. 2004, 'In-situ Measurement of Laterial Side-Necking of a Fracture Specimen Using a Stereo Vision and Digital Image Correlation,' Journal of the Korean Society of Precision Engineering, pp. 154-161
  8. Kim, D.H., Kang, K.J. 2006, 'Relationships between Side Necking and Plastic Zone size Near a Crack Tip in Ductile models. Part I: Modified Boundry Solutions,' submitted to Engineering Fracture Mechanics
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