In assemblies involving compliant parts, springback and residual stress are caused when geometric variation in the assembly requires the parts be deformed to allow for assembly. A method is needed to predict the deformation due to the geometric variations. Researchers in the areas of Statistical Tolerance Analysis and Stochastic Finite Element Analysis have developed methods to account for statistical variation of parameters in a finite element model. A new statistical method uses an orthogonal polynomial-based covariance model to account for surface variation of the compliant parts over a wide range of wavelengths. The method has been demonstrated to match the accuracy of Monte Carlo simulation with a single calculation, and accurately model covariance data taken from real parts.
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ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
September 28–October 2, 2004
Salt Lake City, Utah, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
0-7918-4694-6
PROCEEDINGS PAPER
Covariance Modeling Method for Use in Compliant Assembly Tolerance Analysis
Michael R. Tonks,
Michael R. Tonks
University of Illinois at Urbana-Champaign, Urbana, IL
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Ken W. Chase
Ken W. Chase
Brigham Young University, Provo, UT
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Michael R. Tonks
University of Illinois at Urbana-Champaign, Urbana, IL
Ken W. Chase
Brigham Young University, Provo, UT
Paper No:
DETC2004-57066, pp. 49-55; 7 pages
Published Online:
June 27, 2008
Citation
Tonks, MR, & Chase, KW. "Covariance Modeling Method for Use in Compliant Assembly Tolerance Analysis." Proceedings of the ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 1: 30th Design Automation Conference. Salt Lake City, Utah, USA. September 28–October 2, 2004. pp. 49-55. ASME. https://doi.org/10.1115/DETC2004-57066
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