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FATIGUE STRENGTH OF 7075‐T6 ALUMINIUM ALLOY UNDER COMBINED AXIAL LOADING AND TORSION
Author(s) -
Tanaka K.,
Matsuoka S.,
Kimura M.
Publication year - 1984
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/j.1460-2695.1984.tb00189.x
Subject(s) - materials science , torsion (gastropod) , aluminium , von mises yield criterion , alloy , aluminium alloy , low cycle fatigue , metallurgy , fatigue limit , fatigue testing , structural engineering , composite material , finite element method , engineering , medicine , surgery
The fatigue strength of 7075‐T6 aluminium alloy under combined axial loading and torsion was examined. The S‐N relations were correlated with the von Mises criterion for the high cycle region ( N f ≥ 10 4 cycles) and with the Tresca criterion for the low cycle region ( N f < 10 4 cycles), where N f is the cycles to failure. This transition at N r = 10 4 cycles was related to the occurrence of macroscopic plastic straining and a change in fracture modes. The results are discussed in comparison with those for a high strength steel (SNCM8) in a previous study. Particular attention is given to differences in cyclic deformation behaviour, fracture modes and fatigue crack growth rates between the two materials.