Fatigue crack retrofitting by closing crack surface
Source abstract
Abstract
Abstract This paper mainly focuses on the mechanism of fatigue crack retrofitting by closing crack surface, which has proved to be effective in numerous experiments. The process of crack-closure treatment was simulated by using finite-element approach, and its effect on the crack propagation behavior was discussed in detail. It is found that the crack surface after impact treatment will remain closed until the external stress becomes large enough, however, when it opens, it will propagate again according to the analysis of crack-tip opening displacement. The stress intensity factor is found to reduce after closing the crack surface, resulting in the retardation of crack propagation. An internal-eccentric crack model is proposed as an equivalent model to describe the crack profile after closing the crack surface. Numerical and experimental investigations both support the findings of the simulations. As a result, fatigue crack propagation can be delayed due to the crack surface closure effect, which is the intended purpose of the fatigue crack retrofitting process.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Numerical methods in engineering · Mechanical Behavior of Composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Fatigue cracks in longitudinal ribs of steel orthotropic deck10.1016/j.ijfatigue.2005.07.017 ↗
2. Cracking of longitudinal diaphragms in long-span cable-stayed bridges10.1061/(ASCE)BE.1943-5592.0000771 ↗
3. Fatigue life evaluation on short suspenders of long-span suspension bridge with central clamps10.1061/(ASCE)BE.1943-5592.0001097 ↗
4. Stress concentration at stop-drilled holes and additional holes10.1016/j.engfailanal.2007.11.002 ↗
5. Weld repair for fatigue-cracked joints in steel bridges by applying low temperature transformation welding wire
6. Similitude and the Paris crack growth law10.1016/j.ijfatigue.2008.01.016 ↗
7. Numerical analysis of crack propagation in cyclic-loaded structure
8. High cycle fatigue crack propagation under random and constant amplitude loadings10.1016/0308-0161(76)90014-4 ↗
9. Influence of strength and stress history on growth and stabilisation of fatigue cracks10.1016/0013-7944(72)90078-1 ↗
10. The significance of fatigue crack closure
11. Fatigue crack closure: from LCF to small scale yielding10.1016/j.ijfatigue.2012.02.016 ↗
12. Rehabilitation and improvement of fatigue life of welded joints by ICR treatment
13. Fatigue performance of cracked rib-deck welded joint retrofitted by ICR technique10.1007/s13296-015-0089-x ↗
14. Retarding effects on crack propagation by closing crack surface using ICR treatment10.1016/j.jcsr.2017.12.015 ↗
15. Local stress variation in welded joints by ICR treatment10.1016/j.jcsr.2015.12.001 ↗
16. A modified Johnson-Cook model for flow behavior of alloy 800h at intermediate strain rates and high temperatures10.1007/s11665-017-3076-x ↗
17. Observation of crack closure using a crack mouth opening displacement gauge10.1016/0142-1123(89)90045-5 ↗
18. CTOD and COD relationship in center cracked tension specimens
19. Experimental investigation on fatigue crack behavior of bridge steel Q345qD base metal and butt weld10.1016/j.matdes.2014.10.059 ↗
20. Schijve · 2001
21. The stress intensity factor for a double edge cracked plate by boundary collocation method10.1007/BF00045864 ↗
22. Development of k-gage for stress intensity factor measurement10.1299/kikaia.53.1977 ↗
23. Proposal for prediction of fatigue crack propagation in steel bridges using K-gages10.1201/b17063-23 ↗
24. Rewelding repair effects on fatigue cracks in steel bridge deck welds10.1061/(ASCE)CF.1943-5509.0001083 ↗