대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2004년도 춘계학술대회
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- Pages.420-425
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- 2004
SENB 시험편의 측면함몰과 소성영역관계
Relationship between Side-Necked Volume in a SENB specimen and Plastic Deformation Volume
- 발행 : 2004.04.28
초록
Lee and Kang measured side-necking deformation near a crack-tip for CT specimen using Stereoscopic Digital Speckle Photography and Digital Image Correlation. In this work the same technique was applied to SENB specimen. We happened to find that the deformation shape of the side-necking is similar to the one of plastic region estimated by McClictock using slip line theory. Based on volume constancy of plastic deformation as well as this finding, it is expected that a linear relationship holds between the volume of plastic deformation region and the one of side-necking upon the lateral surface of a specimen. To prove the idea, a preliminary study has been performed using 3-D finite element method on a model with modified boundary layer formulation. As the result, it is shown that the idea works well with acceptable error.
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