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

  • 제31권3호
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  • Pages.344-354
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  • 2007
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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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원공노치 인근에 발생한 결함의 위치변화가 균열성장률(da/dN) 및 응력확대계수범위(δK)의 관계에 미치는 영향 - 단일재 알루미늄과 Al/GFRP 적층재의 피로거동 비교 -

The Effect of Defect Location Near a Circular Hole Notch on the Relationship Between Crack Growth Rate (da/dN) and Stress Intensity Factor Range (δK) - Comparative Studies of Fatigue Behavior in the Case of Monolithic Al Alloy vs. Al/GFRP Laminate -

  • 김철웅 (고려대학교 기계공학과/(주)비엠바이텍) ;
  • 고영호 (숭실대학교 대학원 기계공학과) ;
  • 이건복 (숭실대학교 기계공학과)
  • 발행 : 2007.03.01
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초록

The objective of this study is to investigate the effect of arbitrarily located defect around the circular hole in the aircraft structural material such as Al/GFRP laminates and monolithic Al alloy sheet under cyclic bending moment. The fatigue behavior of these materials may be different due to the defect location. Material flaws in the from of pre-existing defects can severely affect the fatigue crack initiation and propagation behavior. The aim of this study is to evaluate effects of relative location of defects around the circular hole in monolithic Al alloy and Al/GFRP laminates under cyclic bending moment. The fatigue behavior i.e., the stress concentration factor($K_t$), the crack initiation life($N_i$), the relationship between crack length(a) and cycles(N), the relationship between crack growth rate(da/dN) and stress intensity factor range(${\Dalta}K$) near a circular hole are considered. Especially, the defects location at ${\theta}_1=0^{\circ}\;and\;{\theta}_2=30^{\circ}$ was strongly effective in stress concentration factor($K_t$) and crack initiation life($N_i$). The test results indicated the features of different fatigue crack propagation behavior and the different growing delamination shape according to each location of defect around the circular hole in Al/GFRP laminates.

키워드

참고문헌

  1. Lawcock G., Ye L. and Mai Y. W., 1997, 'Progressive Damage and Residual Strength of a Carbon Fiber Reinforced Metal Laminate,' J. of Composite Materials, Vol. 31, No. 8, pp. 762-787 https://doi.org/10.1177/002199839703100802
  2. Nuismer R. J. and Whitney J. M., 1975, 'Uniaxial Failure of Composite Laminates Containing Stress Concentrations,' Fracture Mechanics of Composite, ASTM STP 593, pp. 117
  3. Guo Y. and Wu X., 1999, 'Bridging Stress Distribution in Center-Cracked Fiber Reinforced Metal Laminates,' Engineering Fracture Mechanics, Vol. 63, pp. 147-163 https://doi.org/10.1016/S0013-7944(99)00018-1
  4. Takamatsu T., Matsumura T., Ogura N., Shimokawa T. and Kakuta Y., 1999, 'Fatigue Crack Growth Properties of a GLARE3-5/4 Fiber/Metal Laminate,' Engineering Fracture Mechanics, Vol. 63, pp. 253-272 https://doi.org/10.1016/S0013-7944(99)00021-1
  5. Marissen R., 1988, 'Fatigue Crack Growth in ARALL. A Hybrid Aluminum-Aramid Composite Material, Crack Growth Mechanics and Quantitative Predictions of the Crack Growth Rate,' Report LR-574, Aerospace Eng., Delft Univ. of Tech. the Netherlands
  6. Sam-Hong Song and Cheol-Woong Kim, 2001, 'The Delamination and Fatigue Crack Propagation Behavior in Al5052/AFRP Laminates Under Cyclic Bending Moment,' Transactions of the KSME, A, Vol. 25, No. 8, pp. 1277-1286
  7. Sam-Hong Song and Cheol-Woong Kim, 2002, 'The Effect of Resin Mixture Ratio on Characteristics of Tensile and T-peel Strength in Al/AFRP Laminates,' Transactions of the KSME, A, Vol. 26, No. 11, pp. 2374-2382 https://doi.org/10.3795/KSME-A.2002.26.11.2374
  8. Sam-Hong Song and Cheol-Woong Kim, 2003, 'Fatigue Crack and Delamination Behavior in the Composite Material Containing a Saw-cut and Circular Hole (I) -AFRML-,' Transactions of the KSME, A, Vol. 27, No. 1, pp. 58-65 https://doi.org/10.3795/KSME-A.2003.27.1.058
  9. Sam-Hong Song and Cheol-Woong Kim, 2003, 'The Analysis of Fatigue Behavior Using the Delamination Growth Rate ($dA_{D}$/da) and Fiber Bridging Effect Factor $(F_{BE})$ in Al/GFRP Laminates,' Transactions of the KSME, A, Vol. 27, No. 2, pp. 317-326 https://doi.org/10.3795/KSME-A.2003.27.2.317
  10. Sam-Hong Song and Cheol-Woong Kim, 2003, 'Analysis of Delamination Behavior on the Stacking Sequence of Prosthetic Foot Keel in Glass Fiber Reinforced Laminates,' Transactions of the KSME, A, Vol. 27, No. 4, pp. 623-631 https://doi.org/10.3795/KSME-A.2003.27.4.623
  11. Sam-Hong Song and Cheol-Woong Kim, 2004, 'Evaluation of Delamination Behavior in Hybrid Composite Using the Crack Length and the Delamination Width,' Transactions of the KSME, A, Vol. 28, No. 1, pp. 55-62 https://doi.org/10.3795/KSME-A.2004.28.1.055
  12. Sam-Hong Song and Cheol-Woong Kim, 2004, 'Evaluation of Delamination for Fiber Reinforced Metal Laminates Using a Pseudo Crack Model,' Transactions of the KSME, A, Vol. 28, No. 2, pp. 174-180
  13. Sam-Hong Song and Cheol-Woong Kim, 2004, 'The Effect of Fiber Stacking Angle on the Relationship Between Fatigue Crack and Delamination Behavior in a Hybrid Composite Materials,' Transactions of the KSME, A, Vol. 28, No. 3, pp. 281-288
  14. Cheol-Woong Kim, Sam-Hong Song, Jong-Sung Kim, Dong-Joon Oh and Kwang-Joon Yoon, 2005, 'Stress Distribution and Crack Initiation Behavior due to the Defect Locations in Monolithic Aluminum and Al/Glass Fiber Laminates,' Transactions of the KSME, A, Vol. 29, No. 2, pp. 284-292 https://doi.org/10.3795/KSME-A.2005.29.2.284
  15. Murakami Y. and Nemat-Nasser S., 1982, 'Interaction Dissimilar Semi-Elliptical Surface Flaws under Tension and Bending,' Engineering Fracture Mechanics, Vol. 16, pp. 373-386 https://doi.org/10.1016/0013-7944(82)90115-1
  16. Jan Willem Gunnink, 1990, 'Aerospace ARALL the Advancement in Aircraft Materials,' 35th International SAMPE Symposium, pp. 1708-1721
  17. Peterson, R. E., 1974, Stress Concentration Factors, John Wiley & Sons, Inc., pp. 1-19
  18. Lawcock, G., Ye, L. and Mai, Y. W., 1995, 'Novel Fiber Reinforced Metal Laminates for Aerospace Applications - A Review, Part I - Background & General Mechanical Properties,' SAMPE Journal, Vol. 31, No.1, pp. 23-31
  19. Manson S. S., 1953, 'Behavior of Materials under Conditions of Thermal Stress,' Heat Transfer Symposium, Univ. of Michigan, Engineering Research Institute, pp. 9-75
  20. Braglia B. L. and Hertzberg R. W., 1979, 'Crack Initiation in a High Strength Low-Alloy Steel,' Fracture Mechanics, ASTM STP 677
  21. Partl O. and Schijve. J., 1993, 'Multiple-site damage in 2024-T3 Alloy Sheet,' International Journal of Fatigue, Vol. 15, No. 4, pp. 293-299 https://doi.org/10.1016/0142-1123(93)90378-4