Open AccessAnalysis on Stop-hole Parameters for Fatigue Cracks at Arc Notch in Steel Bridge Deck
Author(s) -
Liangping Feng,
Lipeng Ling,
Cheng Meng,
Bohai Ji
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2148/1/012036
Subject(s) - structural engineering , materials science , deck , stress concentration , arc (geometry) , finite element method , stress (linguistics) , crack closure , composite material , fracture mechanics , engineering , mechanical engineering , linguistics , philosophy
Two types of fatigue cracks at arc notch in steel bridge deck were repaired by drilling stop-holes. The effect of stop-holes with different diameters and positions was considered. Based on finite element models, the variation laws of stress distribution and the effects of stress concentration were compared for different stop-hole diameters and positions. Analysis results indicated that stop-hole can effectively improve the stress concentration at crack tip and the fatigue life of components can be considerably increased. The crack-stopping performance enhances with the increase of stop-hole diameter, but large stop-hole cannot effectively retard crack growth. The stop-hole performs well with the location at -0.5 D ∼0.5 D . The maximum stress point still appears at crack tip when the stop-hole is outside or inside the crack. The stop-hole diameter has no effect on the stop-hole location.