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Structural durability design optimisation and its reliability assessment

Author

Listed:
  • Byeng D. Youn
  • Kyung K. Choi
  • Jun Tang

Abstract

Mechanical fatigue subject to external and inertia transient loads in the service life of mechanical systems often leads to structural failure due to accumulated damage. A structural durability analysis that predicts the fatigue life of mechanical components subject to dynamic stresses and strains is a computer-intensive, multidisciplinary simulation process, since it requires the integration of several computer-aided engineering tools and large amounts of data communication and computation. Uncertainties in geometric dimensions result in the indeterministic fatigue life of a mechanical component. Uncertainty propagation to structural fatigue under transient dynamic loading is not only numerically complicated but also extremely expensive. It is, therefore, a challenge to develop a durability-based design-optimisation process and reliability analysis to ascertain whether the optimal design is reliable. The objective of this paper is to develop an integrated CAD-based computer-aided engineering process to effectively carry out design optimisation for structural durability, yielding a manufacturable, durable, and cost-effective product. In addition, a reliability analysis is executed to assess the reliability of the deterministic optimal design.

Suggested Citation

  • Byeng D. Youn & Kyung K. Choi & Jun Tang, 2005. "Structural durability design optimisation and its reliability assessment," International Journal of Product Development, Inderscience Enterprises Ltd, vol. 1(3/4), pages 383-401.
    • Handle: RePEc:ids:ijpdev:v:1:y:2005:i:3/4:p:383-401
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