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Essential boundary condition enforcement in meshless methods: boundary flux collocation method

✍ Scribed by Cheng-Kong C. Wu; Michael E. Plesha

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
163 KB
Volume
53
Category
Article
ISSN
0029-5981

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✦ Synopsis

Abstract

Element‐free Galerkin (EFG) methods are based on a moving least‐squares (MLS) approximation, which has the property that shape functions do not satisfy the Kronecker delta function at nodal locations, and for this reason imposition of essential boundary conditions is difficult. In this paper, the relationship between corrected collocation and Lagrange multiplier method is revealed, and a new strategy that is accurate and very simple for enforcement of essential boundary conditions is presented. The accuracy and implementation of this new technique is illustrated for one‐dimensional elasticity and two‐dimensional potential field problems. Copyright Β© 2001 John Wiley & Sons, Ltd.

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