TY - JOUR
T1 - Experimental Study of Structural Capability Loss of Bolt Clamping Force and Loosening Life of Bolts under Cyclic Loading Conditions
AU - Yang, Min
AU - Jeong, Seong Mo
AU - Lee, Sung Ho
AU - Lim, Jae Yong
N1 - Publisher Copyright:
© 2022 The Korean Society for Railway.
PY - 2022
Y1 - 2022
N2 - This study investigated the loss of bolt clamping force and the loosening life of bolts under cyclic transverse loading. By varying the displacement amplitudes in Junker tests, it was demonstrated that one of the main factors leading to bolt clamping force reduction was the transverse displacement amplitude. As a result, it was observed that bolt clamping force under cyclic transverse loading changed significantly after an inflection point. Based on the life tests, the relationship between the displacement amplitudes and bolt loosening lives (D-N) was derived, and was found to be similar to the material fatigue life S-N curve. In addition, bolt loosening did not happen at a displacement amplitude of 0.1mm. At a large transverse displacement amplitude, clamping force reduction followed by bolt fracture was observed, jumping over the structural loosening stage, in which bolts experienced rotation.
AB - This study investigated the loss of bolt clamping force and the loosening life of bolts under cyclic transverse loading. By varying the displacement amplitudes in Junker tests, it was demonstrated that one of the main factors leading to bolt clamping force reduction was the transverse displacement amplitude. As a result, it was observed that bolt clamping force under cyclic transverse loading changed significantly after an inflection point. Based on the life tests, the relationship between the displacement amplitudes and bolt loosening lives (D-N) was derived, and was found to be similar to the material fatigue life S-N curve. In addition, bolt loosening did not happen at a displacement amplitude of 0.1mm. At a large transverse displacement amplitude, clamping force reduction followed by bolt fracture was observed, jumping over the structural loosening stage, in which bolts experienced rotation.
KW - Bolt clamping force
KW - Bolt loosening
KW - Bolt loosening life curve
KW - Junker test
UR - http://www.scopus.com/inward/record.url?scp=85147438160&partnerID=8YFLogxK
U2 - 10.7782/JKSR.2022.25.2.89
DO - 10.7782/JKSR.2022.25.2.89
M3 - Article
AN - SCOPUS:85147438160
SN - 1738-6225
VL - 25
SP - 89
EP - 95
JO - Journal of the Korean Society for Railway
JF - Journal of the Korean Society for Railway
IS - 2
ER -