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Design rules for autofrettage of an aluminium valve body
Author(s) -
Sellen S.,
Maas S.,
Andreas T.,
Plapper P.,
Zürbes A.,
Becker D.
Publication year - 2016
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12328
Subject(s) - autofrettage , structural engineering , aluminium , materials science , finite element method , process (computing) , durability , inverse , pressure vessel , internal pressure , mechanical engineering , engineering , composite material , computer science , mathematics , geometry , operating system
The following paper is intended to improve the fatigue behaviour of a complex aluminium valve geometry under high internal cyclic pressure loading. The autofrettage process helps to increase the fatigue durability and a simple, but efficient design method for this process is deployed. Based on non‐linear material's behaviour, finite element simulations of the crack‐free geometry help to determine the minimum and maximum autofrettage pressure to be used, without iterative crack simulations, which would require higher computational effort. Material tests under inverse plastifications were performed in order to determine the correct material model. The derived design method was validated with simplified specimens subjected to different autofrettage pressure levels and subsequent cyclic fatigue tests.