The Stress Subspace of Hybrid Stress Element and the Diagonalization Method for Flexibility Matrix <em>H</em>

ZHANG Can-hui; FENG Wei; HUANG Qian

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Article Navigation > Applied Mathematics and Mechanics > 2002 > 23(11): 1124-1132

ZHANG Can-hui, FENG Wei, HUANG Qian. The Stress Subspace of Hybrid Stress Element and the Diagonalization Method for Flexibility Matrix H[J]. Applied Mathematics and Mechanics, 2002, 23(11): 1124-1132.

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The Stress Subspace of Hybrid Stress Element and the Diagonalization Method for Flexibility Matrix H

Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P R China

Received Date: 2001-10-09
Rev Recd Date: 2002-08-03
Publish Date: 2002-11-15

Abstract

Abstract

The following is proved:1)The linear independence of assumed stress modes is the necessary and sufficient condition for the nonsingular flexibility matrix.2)The equivalent assumed stress modes lead to the identical hybrid element.The Hilbert stress subspace of the assumed stress modes is established.So,it is easy to derive the equivalent orthogonal normal stress modes by Schmidt's method.Because of the resulting diagonal flexibility matrix,the identical hybrid element is free from the complex matrix inversion so that the hybrid efficiency is improved greatly.The numerical examples show that the method is effective.
- hybrid stress finite element,
- Hilbert stress subspace,
- diagonalization method for flexibility matrix

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References(11)

References

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