Local approaches and XFEM used to estimate life of CFRP repaired cracked welded joints under fatigue loading
Source abstract
Abstract
Abstract Three different local approaches, the Theory of Critical Distances (TCD), the Notch Stress Intensity Factor (NSIF) and the Strain Energy Density (SED), and the Extended Finite Element Method (XFEM) were applied to estimate the fatigue life of unrepaired and CFRP patches repaired cracked welded joints. The effects of CFRP modulus and thickness on the fatigue life of welded joints with different initial crack depths were investigated. The fatigue damage evolution equation using the loading frequency as a new damage variable was used to describe the degradation process. Fatigue life assessment results and crack growth paths compared with experimental results using these methods. The results show that the fatigue life and fatigue strength decrease as the increase of the initial crack depth. Three different fatigue failure modes can be observed from experimental results. The TCD, NSIF, and SED can reliably predict the fatigue life of welded joints without CFRP patches, but it needs to further investigate the values of estimation parameters of welded joints with CFRP patches for the NSIF and the SED. Fatigue crack growth paths and lives predicted by the XFEM and actual results are in good agreement, and the accuracy and reliability are validated by test data.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Mechanical Behavior of Composites · Numerical methods in engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
Show source-provided references
1. Fatigue life of cruciform welded joint strengthened with CFRP
2. Fatigue behaviour of CFRP strengthened open-hole steel plates10.1016/j.tws.2017.02.015 ↗
3. Crack propagation prediction of double-edged cracked steel beams strengthened with FRP plates10.1016/j.tws.2018.02.018 ↗
4. Recent developments in local concepts of fatigue assessment of welded joints10.1016/j.ijfatigue.2008.05.019 ↗
5. The theory of critical distances10.1016/j.engfracmech.2007.04.007 ↗
6. Fatigue and fracture emanating from notch; the use of the notch stress intensity factor10.1016/S0029-5493(98)00183-6 ↗
7. Local strain energy density and fatigue strength of welded joints under uniaxial and multiaxial loading10.1016/j.engfracmech.2006.10.019 ↗
8. Fatigue crack initiation prediction of cope hole details in orthotropic steel deck using the theory of critical distances10.1111/ffe.12402 ↗
9. Notch effect on the fatigue behavior of a TC21 titanium alloy in very high cycle regime10.3390/app8091614 ↗
10. High-strength steel wires containing corrosion pits: stress analysis and critical distance based fatigue life estimation10.1111/ffe.13157 ↗
11. On the accuracy of nominal, structural, and local stress based approaches in designing aluminium welded joints against fatigue10.1016/j.ijfatigue.2016.11.002 ↗
12. Critical distance approach for the fatigue strength assessment of magnesium welded joints in contrast to Neuber's effective stress method10.1016/j.ijfatigue.2018.03.004 ↗
13. Nominal and local stress quantities to design aluminium-to-steel thin welded joints against fatigue10.1016/j.ijfatigue.2019.02.018 ↗
14. Fatigue strength assessment of TIG-dressed welded steel joints by local approaches10.1016/j.ijfatigue.2019.04.038 ↗
15. On the use of hot-spot stresses, effective notch stresses and the Point Method to estimate lifetime of inclined welds subjected to uniaxial fatigue loading10.1016/j.ijfatigue.2018.08.032 ↗
16. Gorouhi · 2017
17. Wind-induced fatigue assessment of welded connections in steel tall buildings using the theory of critical distances
18. A unified approach to the evaluation of linear elastic stress fields in the neighborhood of cracks and notches10.1007/BF00018497 ↗
19. A notch intensity factor approach to the stress analysis of welds10.1046/j.1460-2695.1998.00097.x ↗
20. State-of-the-art review of peak stress method for fatigue strength assessment of welded joints
21. Multiaxial fatigue assessment of tube-tube steel joints with weld ends using the peak stress method10.1016/j.ijfatigue.2020.105495 ↗
22. Averaged strain energy density estimated rapidly from nodal displacements by coarse FE analyses: Cracks under mixed mode loadings10.1111/ffe.13187 ↗
23. A finite-volume-energy based approach to predict the static and fatigue behavior of components with sharp V-shaped notches10.1023/A:1013595930617 ↗
24. Leonardi · 2018
25. Application of the strain energy density approach in comparing different design solutions for improving the fatigue strength of load carrying shear welded joints10.1016/j.ijfatigue.2016.09.001 ↗
26. Fatigue strength of steel rollers with failure occurring at the weld root based on the local strain energy values: Modelling and fatigue assessment10.1016/j.ijfatigue.2015.09.023 ↗
27. Strain energy density based fatigue cracking assessment of load-carrying cruciform welded joints10.1016/j.tafmec.2017.04.002 ↗
28. Fatigue assessment of steel load-carrying cruciform welded joints by means of local approaches10.1111/ffe.12870 ↗
29. Fatigue assessment of welded joints by means of the Strain Energy Density method: Numerical predictions and comparison with Eurocode 310.3221/IGF-ESIS.47.09 ↗
30. Fatigue evaluation of rib-to-deck welded joint using averaged strain energy density method10.1016/j.engstruct.2018.09.090 ↗
31. Review of the fatigue strength of welded joints based on the notch stress intensity factor and SED approaches10.1016/j.ijfatigue.2015.11.015 ↗
32. Kraedegh · 2018
33. Fatigue crack propagation in complex stress fields: Experiments and numerical simulations using the Extended Finite Element Method (XFEM)10.1016/j.ijfatigue.2017.05.026 ↗
34. Experimental and XFEM modelling of high cycle fatigue crack growth in steel welded T-joints10.1016/j.ijmecsci.2019.01.040 ↗
35. Numerical simulation of distortion-induced fatigue crack growth using extended finite element method10.1080/15732479.2019.1650076 ↗
36. Experimental and numerical fatigue crack growth of an aluminium pipe repaired by composite patch10.1016/j.engstruct.2016.12.011 ↗
37. XFEM fracture analysis of cracked pipeline with and without FRP composite repairs
38. Fatigue crack growth rate in CFRP reinforced constructional old steel10.1108/IJSI-08-2017-0050 ↗
39. The linear-elastic Theory of Critical Distances to estimate high-cycle fatigue strength of notched metallic materials at elevated temperatures10.1111/ffe.12273 ↗
40. Fatigue crack propagation of short cracks10.1115/1.3443647 ↗
41. A novel formulation of the theory of critical distances to estimate lifetime of notched components in the medium-cycle fatigue regime10.1111/j.1460-2695.2007.01122.x ↗
42. Fatigue strength of steel and aluminium welded joints based on generalised stress intensity factors and local strain energy values10.1007/s10704-005-4043-3 ↗
43. Mohammadi · 2008
44. Three-dimensional fatigue crack growth modelling in a helical gear using extended finite element method10.1111/ffe.12140 ↗
45. GB/T 714-2015. Structural steel for bridge. China, 2015. (in Chinese)
46. IIW guideline for the assessment of weld root fatigue10.1007/s40194-013-0066-y ↗
47. Stress intensity factor and fatigue analysis of cracked cruciform welded joints strengthened by CFRP sheets considering the welding residual stress10.1016/j.tws.2020.106818 ↗
48. Fatigue life prediction of welded joints with artificial corrosion pits based on continuum damage mechanics10.1016/j.jcsr.2018.06.013 ↗
49. Modified Wöhler curve method, theory of critical distances and Eurocode 3: A novel engineering procedure to predict the lifetime of steel welded joints subjected to both uniaxial and multiaxial fatigue loading10.1016/j.ijfatigue.2007.06.005 ↗
50. EN 1993-1-9. Eurocode 3: Design of Steel Structures Part 1-9: Fatigue. 2005.
51. BS 7910. Guide to methods for assessing the acceptability of flaws in metallic structures. British Standards Institution, 2013.
52. Wang · 2016
53. Gupta · 2019