Liljedahl, C. D. M.; Tan, M. L.; Zanellato, O.; Ganguly, S.; Fitzpatrick, M. E. and Edwards, L.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1016/j.engfracmech.2008.02.005|
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Neutron diffraction has been used to measure the evolution of the residual stresses in a VPPA welded Al-2024 alloy middle tension (M(T)) specimen with fatigue loading and subsequent crack growth. The measurements were carried out on the diffractometer ENGIN-X, a time-of-flight instrument, at the ISIS Pulsed Neutron Source. Fatigue crack growth was performed in situ and strain measurements averaged through the thickness of the specimen were made along two orthogonal directions as the crack grew, allowing the stresses in the specimen to be calculated assuming plane stress. 2D finite element simulation of the evolution of the initial residual stress field with crack growth, using an elastic model produced predictions that were in reasonable agreement with the experimental results. The results further indicate that some re-distribution of the residual stress field occurred due to the crack tip plasticity associated with the fatigue loading.
|Item Type:||Journal Article|
|Academic Unit/Department:||Mathematics, Computing and Technology > Engineering & Innovation
Mathematics, Computing and Technology
|Depositing User:||Michael E. Fitzpatrick|
|Date Deposited:||08 Aug 2008 09:26|
|Last Modified:||14 Jan 2016 17:04|
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