Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology (예술인문사회 융합 멀티미디어 논문지)

The Convergent Research Society Among Humanities, Sociology, Science and Technology (인문사회과학기술융합학회)
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Stress Intensity Factor Measurement of Inclined Crack in Tensile Plates by Use of Photoelasticity

광탄성법을 이용한 인장판의 경사균열 응력확대계수 측정

  • Baek, Tae-Hyun (School of Mechanical and Automotive Engineering, Kunsan National Univ.) ;
  • Lee, Chun-Tae (Dept. of Automobile Engineering, Vision Univ.) ;
  • Kim, Young-Chul (School of Mechanical and Automotive Engineering, Kunsan National Univ.)
  • Received : 2015.01.07
  • Accepted : 2015.02.06
  • Published : 2015.04.30
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Abstract

This paper presents the measurement of stress intensity factors of inclined cracks by use of photoelasticity. The distributions of isochromatics near a crack tip of the specimen loaded by uniaxially tensile load are used for analysis. Accuracy and reliability is enhanced by twice multiplying and sharpening the measured isochromatics using digital image processing. Photoelastic results are compared with those obtained by finite element method. Good agreement between them shows that the photoelastic analysis is reliable.

본 논문에서는 중앙에 경사 균열이 있는 시편을 원형편광기에 설치하여 인장하중을 가한 후 나타나는 등색프린지로부터 디지털 영상처리기법을 사용하여 광탄성 프린지를 2배로 증식하여 세선처리한 후, 이로부터 응력확대계수를 측정하였다. 경사균열 시편으로부터 광탄성 법을 이용하여 응력확대계수를 구한 후 이론식으로 계산한 값과 비교하였다. 실험 결과는 이론값에 근접하였으며 광탄성 법으로 응력확대계수를 정밀하게 측정할 수 있는 가능성을 제시하였다.

Keywords