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


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.


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


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