TY - GEN
T1 - An experimental study of breathing mechanism for the transversely cracked shafts
AU - Wu, Helen
AU - Cai, Zhongyi
AU - Xiao, Keqin
PY - 2011
Y1 - 2011
N2 - ![CDATA[Shaft fatigue crack is one of the most common defects in rotating equipment, due to its extensive operation with continuous heavy loads. Finding an efficient way to evaluate the true stiffness variation due to the crack rotation is the key step to develop both on-line and off-line crack diagnostic techniques. This study analyzed time-variant bending stiffness of elastic shafts with experimentally-induced fatigue, welding and wire cut transverse cracks. It was found that crack gap has a significant effect on the opening and closing behaviour of the transverse crack. As in the case of a cut crack, large crack gap could completely prevent the crack from closing during rotation. A fatigue crack without a clear gap shows a typical opening and closing behavior. Further, it remains fully closed within a small angular range and most of time it is partially closed. It was also observed that both switch and harmonic models cannot describe periodic stiffness variation well enough to represent the actual breathing function of the fatigue crack.]]
AB - ![CDATA[Shaft fatigue crack is one of the most common defects in rotating equipment, due to its extensive operation with continuous heavy loads. Finding an efficient way to evaluate the true stiffness variation due to the crack rotation is the key step to develop both on-line and off-line crack diagnostic techniques. This study analyzed time-variant bending stiffness of elastic shafts with experimentally-induced fatigue, welding and wire cut transverse cracks. It was found that crack gap has a significant effect on the opening and closing behaviour of the transverse crack. As in the case of a cut crack, large crack gap could completely prevent the crack from closing during rotation. A fatigue crack without a clear gap shows a typical opening and closing behavior. Further, it remains fully closed within a small angular range and most of time it is partially closed. It was also observed that both switch and harmonic models cannot describe periodic stiffness variation well enough to represent the actual breathing function of the fatigue crack.]]
UR - http://handle.uws.edu.au:8081/1959.7/557465
UR - http://www.icmpmt.net/2011/index.asp
U2 - 10.4028/www.scientific.net/AMR.338.547
DO - 10.4028/www.scientific.net/AMR.338.547
M3 - Conference Paper
SN - 9781613447246
SP - 547
EP - 552
BT - Product Design and Manufacturing: Proceedings of the International Conference on Materials and Products Manufacturing Technology (MPMT 2011), 28th-30th October, 2011, Chengdu, China
PB - Scientific.Net
T2 - International Conference on Materials and Products Manufacturing Technology
Y2 - 1 January 2011
ER -