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Reliability-Based Design Optimization for Durability of Ground Vehicle Suspension System Components

Abstract

The effect of materials processing- and component manufacturing-induced uncertainties in material properties and component shape and size on the reliability of component performance is investigated. Specifically, reliability of a suspension system component from a high-mobility multipurpose wheeled vehicle which typically can fail under low-cycle strain-based fatigue conditions is analyzed. Toward that end, the most advanced reliability-based design optimization methods available in the literature were combined with the present understanding of low-cycle fatigue durability and applied to the component in question. This entailed intricate integration of several computational tools such as multibody vehicle dynamics, finite-element simulations, and fatigue strain-life assessment/prediction techniques. The results obtained clearly revealed the importance of consideration of material property uncertainties in attaining vehicle performance of critical structural components in complex systems (e.g., a vehicle).

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Acknowledgment

The material presented in this article is based on work supported by a research contract with the Automotive Research Center (ARC) at the University of Michigan and TARDEC.

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Correspondence to M. Grujicic.

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Grujicic, M., Arakere, G., Bell, W.C. et al. Reliability-Based Design Optimization for Durability of Ground Vehicle Suspension System Components. J. of Materi Eng and Perform 19, 301–313 (2010). https://doi.org/10.1007/s11665-009-9482-y

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  • DOI: https://doi.org/10.1007/s11665-009-9482-y

Keywords

  • fatigue-controlled durability
  • material property uncertainties
  • probabilistic constraints
  • reliability-based design optimization (RBDO)