Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Effect of Stress Ratio on Fatigue Crack Growth in Mixed Mode(I+II)

혼합모드(I+II)에서 피로균열진전에 미치는 응력비의 영향

  • 공병채 (금오공과대학교 대학원 생산기계공학과) ;
  • 최명수 (아전기계) ;
  • 권현규 (금오공과대학교 기계공학부) ;
  • 최성대 (금오공과대학교 기계공학부)
  • Received : 2009.10.26
  • Accepted : 2009.12.29
  • Published : 2009.12.30
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Abstract

The loading condition of actual construction works is complex. The shear effect of mixed-mode load component are crack propagation mechanism in step larger than the crack initial mechanism. Therefore, in this study received a mixed-mode loading on fatigue crack stress ratio on crack propagation path and speed of progress to learn whether stress affects crack propagation. ${\Delta}$ P a constant state of fatigue tests in Mode I, II give the same stress ratio, frequency 10Hz, sinusoidal waveform was used. A lower stress ratio fatigue crack propagation angle is small. This is less affected by the Mode II. Therefore, a mixed-mode fatigue crack propagation is to progress by the Mode. Stress ratio in a mixed mode crack in the path of progress and found a lot of impact.

Keywords

References

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