A stabilized conforming (SC) nodal integration method is developed for elastoplastic contact analysis of metal forming processes. In this approach, strain smoothing stabilization is introduced to eliminate spatial instability in collocation meshfree methods. The gradient matrix associated with strain smoothing satisfies the integration constraint (IC) of linear exactness in the Galerkin approximation. Strain smoothing formulation and numerical procedures for history-dependent problems are introduced. Applications to metal forming analysis are presented, with the results demonstrating a significant improvement in computational efficiency without loss of accuracy.
Issue Section:
Technical Papers
1.
Chen
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.2.
Chen
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.3.
Chen
, J. S.
, and Wang
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,” Comput. Methods Appl. Mech. Eng.
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.4.
Belytschko
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, J. T.
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,” Comput. Methods Appl. Mech. Eng.
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.7.
Dolbow
, J.
, and Belytschko
, T.
, 1999
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,” Computational Mechanics
, 23
, pp. 219
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.8.
Chen
, J. S.
, Wu
, C. T.
, Yoon
, S.
, and You
, Y.
, 2001
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,” Int. J. Numer. Methods Eng.
, 50
, pp. 435
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.9.
Chen, J. S., and Wang, H. P., 2000, “Meshfree Smooth Surface Contact Algorithm for Sheet Metal Forming,” SAE 2000, March 6–9, Detroit.
10.
Choudhry
, S.
, and Lee
, J. K.
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,” Int. J. Mech. Sci.
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, pp. 189
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.11.
Song, N., Qian, D., Cao, J., Cao, W. K., and Li, S., 2001, “Effective Models for Prediction of Springback in Flanging,” accepted, ASME J. Eng. Mater. Technol.
Copyright © 2001
by ASME
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