Method, System, and computer program product for calculating...

Details Method, System, and computer program product for calculating... Method, System, and computer program product for calculating...

2007-07-16

2010-06-15

Cosimano, Edward R (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C073S760000, C702S187000, C702S189000, C703S007000

Reexamination Certificate

active

07739059

ABSTRACT:
A method, system, and computer program product for calculating the residual stress equilibrium of two elastoplastic cylinders coldworked by expansion to obtain interference fit. The deformation state due to an internal expansion load applied to an inner cylinder that will result in interference of the inner cylinder with the outer cylinder can be calculated. The deformation state due to an unloading of the internal expansion load that will result in assembly of the inner cylinder and the outer cylinder can be calculated. The residual stresses, residual displacement and residual strains in the inner cylinder and the outer cylinder, whether they are eventually interference fitted or not, can all be calculated and recorded.

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Eraslan, A.N. and T. Akis, “Deformation analysis of elastic-plastic two layer tubes subject to pressure: an analytical approach”, Turkish Journal of Engineering and Environmental Sciences, 2004, 28: p. 261-268.
Hsu, Y.C. and R.G. Forman, “Elastic-plastic analysis of an infinite sheet having a circular hole under pressure,” Journal of Applied Mechanics, 1975, 42(June): p. 347-352.
Jahed, H., “A variable material property approach for elastic-plastic analysis of proportional and nonproportional loading, in Mechanical engineering,” 1997, University of Waterloo.

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