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Transient Dynamic Fatigue Analysis of Automotive Structures using Proving Ground Road Profiles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 11, 2005 by SAE International in United States
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A methodology is developed using linear system model and road profiles for fatigue life prediction of automotive structures. The main focus is to develop a robust process capable of handling long proving ground tracks which will provide reliable damage prediction away from suspension and an A-to-B class estimate towards the suspension. The method uses normal mode shapes to approximate response and transient dynamic solution is obtained using a special purpose solver, which includes new damping formulation. A new process was used to identify damage critical road tracks from a set of proving ground roads. For a typical vehicle, the method identified more than 80% of peak damage locations predicted using measured loads; some of the damage estimates being very close.
CitationVellaichamy, S., "Transient Dynamic Fatigue Analysis of Automotive Structures using Proving Ground Road Profiles," SAE Technical Paper 2005-01-0514, 2005, https://doi.org/10.4271/2005-01-0514.
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