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1 International Journal of Applied Mechanics and Engineering

1 2001

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Prediction of the elastic shakedown limit in elastohydrodynamically lubricated line contacts

Donzella G., Mazzu A., Solazzi L.

International Journal of Applied Mechanics and Engineering

2001

Vol. 6, no 4

1051-1060

Different failure mechanisms are possible in cyclic contact phenomena, from wear to surface or subsurface fatigue. The limit of the material elastic shakedown is a critical parameter, because an early failure has to be expected when it is exceeded. It depends on all the tribological quantities involved in the process, which determine the effective stress field in the bulk of contacting bodies. This paper presents a program developed just to solve sequentially both the EHDL problem and the stress problem. A complete interface between these two parts of the program has been developed, thus permitting the user to make a fast evaluation of the failure risk. The effects of the rheological parameters on the limit of elastic shakedown are finally shown. The hypothesis of surface hardened components, i. e. in the presence of a material with strength varying along the depth, is also taken into consideration.