Journal of the Korea Convergence Society (한국융합학회논문지)

Korea Convergence Society (한국융합학회)
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Structural Safety Analysis on Crack Propagation in Compact Tension Specimen

소형 인장 시험편 내의 크랙 전파에 대한 구조 안전해석

  • Cho, Jae-Ung (Division of Mechanical &Automotive Engineering, Kongju National University)
  • 조재웅 (공주대학교 기계자동차공학부)
  • Received : 2014.01.17
  • Accepted : 2014.02.26
  • Published : 2014.03.31
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Abstract

In case eccentric load is applied at compact tension specimen, the propagation behavior due to existence or nonexistence of hole, numbers and positions of holes near crack is investigated in this study. Strain energy, displacement and stress happened in specimen are examined through simulation analysis. And stress intensity factor is obtained by the basis of strain energy and deformation. When defect or hole exists in structure, the possibility of fracture can be thought to be verified by using the study result.

본 연구에서는 소형 인장 시험편에 편심된 집중하중을 가하였을 때, 크랙 주변에서의 구멍의 존재유무, 개수 및 위치에 따른 전파 거동에 대하여 규명하였다. 시뮬레이션 해석을 통하여 시험편에서 발생하는 Strain energy와 변형량, 응력에 대해 알 수 있었다. 그리고 이들 Strain energy와 변형량을 바탕으로 응력확대계수를 구하였으며, 본 연구결과를 이용하면 구조물 내에 결함이나 구멍 등이 있을 때 그 파괴 가능성을 검증할 수 있다고 사료된다.

Keywords

References

  1. L. Yongming and M. Sankaran in: Fatigue Limit Prediction of notched Components using Short Crack Growth Theory and an Asymptotic Interpolation Methhod, Engineering Fracture Mechanics,(2008), in press.
  2. Kwak, D. S., Kim, S. H., Oh, T, Y. Effect of a Single Applied Overload on Fatigue Crack Growth Behavior in Laser-welded Sheet Metal. Int. J. Precis. Eng. Manuf., 7(3), pp. 30-34, 2006.
  3. Liu, J,, Wang, Y,, Li, W. Simplified Fatigue Durability Assessment for Rear Suspension Structure. Int. J. Autom. Technol., 11(5), pp. 659-664, 2010. https://doi.org/10.1007/s12239-010-0078-1
  4. J. U. Cho. Durability Analysis of Automotive Grill Frame. Jou. of Korean Soc. of Mechanical Technology, Vol. 14(3), pp. 51-57, 2012.
  5. H. K. Choi, J. U. Cho. Experimental Study on Fracture Behaviour of Double Cantilever Beam Specimen with Aluminum Foam. Jou. of Korean Soc. of Mechanical Technology, Vol. 14(5), pp. 37-41, 2012.
  6. H. K. Choi, J. U. Cho. Study on the Fatigue Analysis of DCB Model with Aluminum Foam. Jou. of Korean Soc. of Mechanical Technology, Vol. 14(6), pp. 39-43, 2012.