application of a fatigue equivalent static load methodology durability assessment vehicle structures文档.pdf

International Journal of Fatigue 31 (2009) 1541–1549 Contents lists available at ScienceDirect International Journal of Fatigue journal homepage: www.elsevi /locate/ijfatigue Application of a fatigue equivalent static load methodology for the numerical durability assessment of heavy vehicle structures Johann Wannenburg a,*, P. Stephan Heyns a, Anton D. Raath b a Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, South Africa b 3 Consultants in Automated Test and Structural-Dynamic Simulation Systems (CaTs ) Ltd., Kenilworth, United Kingdom a r t i c l e i n f o a b s t r a c t Article history: It is common practice in the automotive industry to employ multi-parameter strain-life methods, in com- Received 18 July 2007 bination with dynamic finite element analyses, based on very extensive measurement exercises, to con- Received in revised form 27 April 2009 duct analytical fatigue life assessments, which is then verified through intensive durability testing. The Accepted 30 April 2009 expense and complexity of this approach makes its application impractical for low volume ‘‘special” vehi- Available online 24 May 2009 cles. In this paper, a fatigue equivalent static load (FESL) methodology for the numerical durability assess- ment of heavy vehicle structures is presented, where fatigue load requirements are derived