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Tolerance Analysis of Compliant Assemblies Using FEM Simulations and Modal Description of Shape Defects

[+] Author Affiliations
Alain Stricher, Laurent Champaney, Francois Thiebaut

UniverSud Paris, Cachan, France

Benoit Fricero, Nicolas Chevassus

EADS - Innovation Works, Suresnes, France

Paper No. ESDA2012-83002, pp. 307-314; 8 pages
doi:10.1115/ESDA2012-83002
From:
  • ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 1: Advanced Computational Mechanics; Advanced Simulation-Based Engineering Sciences; Virtual and Augmented Reality; Applied Solid Mechanics and Material Processing; Dynamical Systems and Control
  • Nantes, France, July 2–4, 2012
  • Conference Sponsors: International
  • ISBN: 978-0-7918-4484-7
  • Copyright © 2012 by ASME

abstract

This paper propose to perform tolerance analysis on compliant structure. The objective is to limit shape defects and connection defects in accordance to mechanical criteria instead of geometrical criteria. The idea is to elaborate a finite element model of the structure and to observe the stress induced by assembling non ideal parts. Firstly, a method to take into account the stiffness variation induced by the shape defects is tested on an elementary example. Secondly this method is applied on an large structure from aeronautical industry with a lot of variability. A method is also presented to find the geometrical defects which are mostly responsible of overloading the connections.

Copyright © 2012 by ASME

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