| Structural Engineering and Mechanics Volume 11, Number 4, April 2001, pages 443-460 DOI: https://doi.org/10.12989/sem.2001.11.4.443 | |
Variable-node axisymmetric solid element and its application to adaptive mesh refinement | |
Chang-Koon Choi, Eun-Jin Lee and Wan-Hoon Lee(Korea)
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| Abstract [Buy Article] | |
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This paper presents an effective application of a variable-node axisymmetric solid element designated as AQV (Axisymmetric Quadrilateral Variable-node element). The variable-node element with physical midside nodes helps to overcome some problems in connecting the different layer patterns on a quadrilateral mesh in the adaptive h-refinement. This element alleviates the necessity of imposing displacement constraints on irregular (hanging) nodes in order to enforce the inter-element compatibility. Therefore, the elements with variable mid-side nodes can be used effectively in the local mesh refinement for the axisymmetric structures which have stress concentrations. A modified Gaussian quadrature should be adopted to evaluate the stiffness matrices of the variable-node elements mainly because of the slope discontinuity of assumed displacement within the elements. Some numerical examples show the usefulness of variable-node axisymmetric elements in the practical application. | |
| Key Words | |
| quadrilateral axisymmetric element; irregular node; variable-node element; transition element; adaptive h-refinement. | |
| Address | |
| Chang-Koon Choi and Eun-Jin Lee, Department of Civil Engineering, KAIST, Taejon 305-600, Korea Wan-Hoon Lee, Department of Civil & Environment Engineering, Chungwoon University, Chungnam 350-701, Korea | |
