TY - JOUR
T1 - A practical expression for evaluating the small shear-mode fatigue crack threshold in bearing steel
AU - Okazaki, Saburo
AU - Matsunaga, Hisao
AU - Ueda, Tohru
AU - Komata, Hiroki
AU - Endo, Masahiro
N1 - Funding Information:
This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO), the Fundamental Research Project on Advanced Hydrogen Science (2006–2012) and Hydrogen Utilization Technology (2013–2018); and the International Institute for Carbon Neutral Energy Research (WPI-I 2 CNER), sponsored by the Japanese Ministry of Education, Culture, Sport, Science and Technology.
Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - The ranges of the threshold stress intensity factor (SIF), δKIIth and δKIIIth, for small shear-mode cracks in bearing steel are measured using torsional fatigue testing under static compression. The threshold values are described as a function of the crack size and the crack-face interference. In addition, to simplify the evaluation of the shear-mode threshold, a single parameter, Kτ, is introduced to represent the SIF of shear-mode cracks. Moreover, a practical expression for approximating Kτ is proposed on the basis of the area parameter model. Finally, the threshold SIF range δKτth is found to exhibit a dependence on the crack size similar to that of small mode I cracks, i.e., δKτth∝(area)1/3, for the regime of small shear-mode cracks with area values ranging from 0.01 to 1mm.
AB - The ranges of the threshold stress intensity factor (SIF), δKIIth and δKIIIth, for small shear-mode cracks in bearing steel are measured using torsional fatigue testing under static compression. The threshold values are described as a function of the crack size and the crack-face interference. In addition, to simplify the evaluation of the shear-mode threshold, a single parameter, Kτ, is introduced to represent the SIF of shear-mode cracks. Moreover, a practical expression for approximating Kτ is proposed on the basis of the area parameter model. Finally, the threshold SIF range δKτth is found to exhibit a dependence on the crack size similar to that of small mode I cracks, i.e., δKτth∝(area)1/3, for the regime of small shear-mode cracks with area values ranging from 0.01 to 1mm.
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U2 - 10.1016/j.tafmec.2014.07.016
DO - 10.1016/j.tafmec.2014.07.016
M3 - Article
AN - SCOPUS:84908067855
VL - 73
SP - 161
EP - 169
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
SN - 0167-8442
ER -