Peer-Reviewed Journal Details
Mandatory Fields
Davis, T;Ding, J;Sun, W;Leen, SB
2010
January
Proceedings Of The Institution Of Mechanical Engineers Part L-Journal Of Materials-Design And Applications
Computational simulation of the relaxation of local stresses due to foreign object damage under cyclic loading
Published
()
Optional Fields
RESIDUAL-STRESSES FATIGUE PREDICTION TI-6AL-4V
224
41
50
In this study, the phenomenon of residual stress relaxation from foreign object damage (FOD) is numerically simulated using a hybrid explicit implicit finite-element method. The effects of cycle fatigue loadings on stress relaxation were studied. FOD is first simulated by firing a 3 mm cube impacting onto a plate made of titanium alloy Ti-6Al-4V at 200 m/s. The FOD impact produces two distinct stress concentrations: one is compressive directly beneath the impact site; the other is tensile around the outer edge of the impact. The plate was then assumed to be subjected to a cyclic fatigue loading. The stress relaxation was investigated under a range of stress ratios and maximum applied stresses. Two different material models were considered for the simulations, namely an elastic perfectly plastic model and a non-linear kinematic hardening model.
1464-4207
10.1243/14644207JMDA286
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