Reference : Improved design of threaded connections by autofrettage in aluminium compounds for cy...
Scientific journals : Article
Engineering, computing & technology : Mechanical engineering
http://hdl.handle.net/10993/20784
Improved design of threaded connections by autofrettage in aluminium compounds for cyclic high pressure loading: design calculations and experimental verification
English
Sellen, Stephan mailto []
Maas, Stefan mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Andreas, Thomas mailto []
Plapper, Peter mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Zuerbes, Arno mailto []
Becker, Daniel mailto []
12-Jan-2015
Fatigue & Fracture of Engineering Materials & Structures
Blackwell Publishing
Yes (verified by ORBilu)
International
8756-758X
1460-2695
[en] Fatigue of threaded connections in aluminium components ; non-linear finite element simulation ; FKM guideline
[en] Threaded connections in an aluminium valve body under high internal swelling pressure are investigated. A static straining process called autofrettage leads to an improved fatigue behaviour of the aluminium component, while normally the threaded connections are unloaded during this autofrettage. But by unloading the thread during autofrettage the first loaded thread flank became the weakest point of this valve component. This effect is analyzed with non-linear finite element simulations, FKM guideline for fatigue assessment and by experimental testing. The analytical and experimental parts match very well and it can be shown that a well-designed autofrettage without unloading the threaded connection is helpful for the aluminium thread and extends its fatigue lifetime, as compressive residual stresses and an equalized stress distribution over the thread flanks can be generated. Finally different materials were chosen for the plug or screw and this effect for cyclic loading is shortly analyzed.
University of Luxembourg - UL
http://hdl.handle.net/10993/20784

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