EAS concept for higher-order finite shell elements to eliminate volumetric locking
✍ Scribed by J.-H. Hommel; G. Meschke
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 391 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0029-5981
- DOI
- 10.1002/nme.2305
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✦ Synopsis
Abstract
The deficiency of volumetric locking phenomena in finite elements using higher‐order shell element formulations based on Lagrangean polynomials and a linear finite shell kinematics cannot be avoided by the existent enhanced assumed strain (EAS) concept established for low‐order elements. In this paper a consistent modification of the EAS concept is proposed to extend its applicability to higher‐order shell elements. This modification, affecting the transversal normal strain for polynomial orders p>1, eliminates pathological modes caused by volumetric locking. The efficiency of the proposed extended EAS method is demonstrated by means of eigenvalue analyses and two representative numerical examples. Copyright © 2008 John Wiley & Sons, Ltd.