Title: A novel technique for multiaxial fatigue modelling of ground vehicle notched components

Authors: Ayhan Ince

Addresses: School of Engineering Technology, Purdue University, West Lafayette, Indiana 47907, USA

Abstract: Fatigue failures of driveline and suspension for ground vehicles under multiaxial loading conditions are common, since most of those components are subjected to complex multiaxial loadings in service. A computational fatigue analysis methodology has been proposed here for performing multiaxial fatigue life prediction for notched components using analytical and numerical methods. The proposed fatigue analysis methodology consists of an elastic-plastic stress/strain model and a multiaxial fatigue damage parameter. Results of the proposed fatigue analysis methodology are compared to sets of experimental data published in the literature to verify the prediction capability of the elastic-plastic stress/strain model and the multiaxial fatigue damage parameter. Based on the comparison between calculated results and experimental data, it is found that the proposed multiaxial analysis methodology correlates well with experimental strain data for SAE 1070 steel notched shafts and experimental fatigue data of SAE 1045 steel notched shafts.

Keywords: fatigue life prediction; stress-strain models; notched components; ground vehicles; multiaxial fatigue; fatigue modelling; vehicle design; driveline failure; suspension failure; fatigue damage; elastic-plastic stress-strain; steel shafts; notched shafts.

DOI: 10.1504/IJVD.2015.069486

International Journal of Vehicle Design, 2015 Vol.67 No.3, pp.294 - 313

Accepted: 18 Nov 2014
Published online: 18 May 2015 *

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