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Structural Engineering and Mechanics Volume 16, Number 4, October 2003 , pages 479-492 DOI: https://doi.org/10.12989/sem.2003.16.4.479 |
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Variable-node non-conforming membrane elements |
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Chang-Koon Choi and Tae-Yeol Lee
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| Abstract | ||
| Non-conforming membrane elements which have variable number of mid-side nodes with drilling degrees of freedom and which is designated as NMDx have been presented in this paper. The non-conforming elements with variable number of mid-side nodes can be efficiently used in the local mesh refinement for the in-plane structures. To guarantee the developed elements always pass the patch test, the direct modification method is incorporated into the element formulation. Detailed numerical tests in this study show the validity of the variable node NC elements developed in this study and a wide applicability of these elements to practical problems. | ||
| Key Words | ||
| direct modification method; drilling degrees of freedom; membrane element; transition element; variable node. | ||
| Address | ||
| Chang-Koon Choi; Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea Tae-Yeol Lee; Department of Civil and Environmental Engineering, University of California, Los Angeles, CA90095, USA | ||