TY - GEN
T1 - Effect of specimen thickness on fatigue crack propagation and acoustic emission behaviors in Q345 steel
AU - Li, Junrong
AU - Luo, Hongyun
AU - Han, Zhiyuan
AU - Jin, Feixiang
N1 - Publisher Copyright:
© Springer Science+Business Media New York 2015.
PY - 2015
Y1 - 2015
N2 - The effects of specimen thickness on fatigue crack growth rate (FCGR) and acoustic emission (AE) behaviors of Q345 steel were investigated. The fourpoint bending fatigue tests were carried out with AE monitoring simultaneously. Based on the thickness effect analysis, fatigue behavior studies, and AE investigations, the effects of specimen thickness on AE signal and AE source mechanisms during fatigue crack propagation were proposed. The results show that as specimen thickness increased, the FCGR was accelerated slightly, while the AE count rate was increased significantly, suggesting that AE signal was more sensitive to the changes in thickness. By analyzing the AE signals at the new plastic yielding area and the crack tip micro-fracture process, AE source mechanisms were explained. These results suggest that the effects of thickness must be considered to obtain a more accurate estimation of fatigue crack propagation through AE technique.
AB - The effects of specimen thickness on fatigue crack growth rate (FCGR) and acoustic emission (AE) behaviors of Q345 steel were investigated. The fourpoint bending fatigue tests were carried out with AE monitoring simultaneously. Based on the thickness effect analysis, fatigue behavior studies, and AE investigations, the effects of specimen thickness on AE signal and AE source mechanisms during fatigue crack propagation were proposed. The results show that as specimen thickness increased, the FCGR was accelerated slightly, while the AE count rate was increased significantly, suggesting that AE signal was more sensitive to the changes in thickness. By analyzing the AE signals at the new plastic yielding area and the crack tip micro-fracture process, AE source mechanisms were explained. These results suggest that the effects of thickness must be considered to obtain a more accurate estimation of fatigue crack propagation through AE technique.
UR - https://www.scopus.com/pages/publications/84910660019
U2 - 10.1007/978-1-4939-1239-1_21
DO - 10.1007/978-1-4939-1239-1_21
M3 - 会议稿件
AN - SCOPUS:84910660019
T3 - Springer Proceedings in Physics
SP - 225
EP - 234
BT - Advances in Acoustic Emission Technology - Proceedings of the World Conference on Acoustic Emission–2013
A2 - Shen, Gongtian
A2 - Wu, Zhanwen
A2 - Zhang, Junjiao
PB - Springer Science and Business Media, LLC
T2 - World Conference on Acoustic Emission 2013, WCAE 2013
Y2 - 30 October 2013 through 2 November 2013
ER -