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| The influence of the transverse crack models on the shafting`s torsional shearing stress |
LI Yiliang1 XIE Danmei1 ZHANG Hengliang1 QIAN Yong1 ZHAO Xianbo1 DONG Chan2
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| 1.Power and Mechanical College , Wuhan University , Wuhan 430072 ,China; 2.Yunnan Electric Power Research Institute ,Kunming 650051,China |
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Abstract In order to study the influence of the transverse crack models on the shafting`s torsional shearing stress calculation, this paper deduces and analyzes the mode Ⅲ stress intensity factor in the crack deepest point of the transverse straight crack model and the transverse semi-elliptical crack model. The calculating result indicates that: the relative distinction of the torsional shearing stress by using these two models might be great and the biggest distinction can reach about 60%. But in a particular range, the distinction is rather small. In addition, this paper has defined a critical relative distinction concerning the torsional shearing stress of the two models, and then confirmed the corresponding critical elliptical parameters with different crack depth ratios. At last, this paper has fitted an equation, with regard to the critical elliptical parameters under different crack depth ratios, so as to build up a theoretical background for scientifically selecting models.
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Received: 28 January 2008
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2009, Vol. 28 
