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Crack Resistance Behavior Using Digital Image Correlation and Crack Tip Opening Angle on Particulate Reinforced Composite

디지털 화상관련법 및 균열선단열림각도를 이용한 입자강화 복합재료의 균열저항거동

  • Na, Seong Hyeon (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.) ;
  • Lee, Jeong Won (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.) ;
  • Kim, Jae Hoon (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
  • 나성현 (충남대학교 기계공학과) ;
  • 이정원 (충남대학교 기계공학과) ;
  • 김재훈 (충남대학교 기계공학과)
  • Received : 2016.05.13
  • Accepted : 2016.10.10
  • Published : 2016.12.01

Abstract

In this study, crack resistance is evaluated by the crack tip opening angle (CTOA) using a wedge splitting test (WST) on a viscoelastic particulate reinforced composite based on an HTPB binder. Generally, CTOA, as a function of crack extension, is used in order to determinate fracture resistance and has a steady state relative angle. Digital image correlation (DIC) is used to measure the crack tip opening displacement (CTOD) and crack extension for the critical crack tip opening angle (CTOAc). In these results, the CTOAc value of a particulate reinforced composite tends to approach a constant angle after a small amount of crack extension. The CTOAc value increases with decreasing temperature, from $50^{\circ}C$ to $-40^{\circ}C$. These CTOAc values may be used to measure fracture mechanics parameters for particulate reinforced composite.

Keywords

Digital Image Correlation;Crack Tip Opening Angle;Particulate Reinforced Composite;Wedge Splitting Test

References

  1. Tussiwand, G. S., Saoirna, V. E., Terzenbach, R. and De Luca, L. T., 2009, "Fracture Mechanics of Composite Solid Rocket Propellant Grains: Material Testing," Journal of Propulsion and Power, Vol. 25, No. 1, pp. 60-73. https://doi.org/10.2514/1.34227
  2. Newman Jr, J. C., James, M. A. and Zerbst, U., 2003, "A Review of the CTOA/CTOD Fracture Criterion," Engineering Fracture Mechanics, Vol. 70, No. 3-4, pp. 371-385. https://doi.org/10.1016/S0013-7944(02)00125-X
  3. Lacroix, R., Lens, A., Kermouche, G., Bergheau, J. M. and Klocker, 2012, "Determination of CTOA in the Molten Material of Spot Welds Using the Digital Image Correlation Technique," Engineering Fracture Mechanics, Vol. 86, No. 1, pp. 48-55. https://doi.org/10.1016/j.engfracmech.2012.02.012
  4. Zenkun, L., Ruixiang, B,. Libo, D. and Wei, Q., 2012 "Noncontact Optical Measurement of CTOA and CTOD for Interface Crack in DCB Test," Optics and Lasers in Engineering, Vol. 50, No. 7, pp. 963-970.
  5. Zhang, H., Huang, G., Song, H. and Kang, Y., 2012, "Experimental Investigation of Deformation and Failure Mechanisms in Rock Under Indentation by Digital Image Correlation," Engineering Fracture Mechanics, Vol. 96, No. 1, pp. 667-675. https://doi.org/10.1016/j.engfracmech.2012.09.012
  6. Gao, G., Huang, S., Xia, K. and Li, Z., 2015, "Application of Digital Image Correlation (DIC) in Dynamic Notched Semi-Circular Bend (NSCB) tests", Experimental Mechanics, Vol. 55, No. 1, pp. 99-104.
  7. Bohn, M. A. and Elsner, P., 1999, "Aging of the Binders GAP-N100 and HTPB-IPDI Investigated by Torsion DMA," Propellants, Explosives, Pyrotechnics, Vol. 24, pp. 199-205. https://doi.org/10.1002/(SICI)1521-4087(199906)24:03<199::AID-PREP199>3.0.CO;2-L
  8. Liu, C. T., 1997, "Crack Growth Behavior in a Solid Propellant," Engineering Fracture Mechanics, Vol. 56, No. 1, pp. 127-135. https://doi.org/10.1016/S0013-7944(96)00107-5
  9. Seo, B. H. and Kim, J. H., 2013, "Effect of Temperature and Thickness on Fracture Toughness of Solid Propellant," Trans. Korean Soc. Mech. Eng. A, Vol. 37, No. 11, pp. 1355-1360. https://doi.org/10.3795/KSME-A.2013.37.11.1355
  10. Seo, B. H. and Kim, J. H., 2015, "Estimation of Mechanical Behavior for Particulate Reinforced Composites at Different Temperatures," Advanced Materials Research, Vol. 1110, pp. 32-35. https://doi.org/10.4028/www.scientific.net/AMR.1110.32