Abstract and Applied Analysis

Efficient Finite Element Methodology Based on Cartesian Grids: Application to Structural Shape Optimization

E. Nadal, J. J. Ródenas, J. Albelda, M. Tur, J. E. Tarancón, and F. J. Fuenmayor

Full-text: Open access

Abstract

This work presents an analysis methodology based on the use of the Finite Element Method (FEM) nowadays considered one of the main numerical tools for solving Boundary Value Problems (BVPs). The proposed methodology, so-called cg-FEM (Cartesian grid FEM), has been implemented for fast and accurate numerical analysis of 2D linear elasticity problems. The traditional FEM uses geometry-conforming meshes; however, in cg-FEM the analysis mesh is not conformal to the geometry. This allows for defining very efficient mesh generation techniques and using a robust integration procedure, to accurately integrate the domain’s geometry. The hierarchical data structure used in cg-FEM together with the Cartesian meshes allow for trivial data sharing between similar entities. The cg-FEM methodology uses advanced recovery techniques to obtain an improved solution of the displacement and stress fields (for which a discretization error estimator in energy norm is available) that will be the output of the analysis. All this results in a substantial increase in accuracy and computational efficiency with respect to the standard FEM. cg-FEM has been applied in structural shape optimization showing robustness and computational efficiency in comparison with FEM solutions obtained with a commercial code, despite the fact that cg-FEM has been fully implemented in MATLAB.

Article information

Source
Abstr. Appl. Anal., Volume 2013, Special Issue (2013), Article ID 953786, 19 pages.

Dates
First available in Project Euclid: 26 February 2014

Permanent link to this document
https://projecteuclid.org/euclid.aaa/1393443491

Digital Object Identifier
doi:10.1155/2013/953786

Mathematical Reviews number (MathSciNet)
MR3045039

Zentralblatt MATH identifier
1328.74081

Citation

Nadal, E.; Ródenas, J. J.; Albelda, J.; Tur, M.; Tarancón, J. E.; Fuenmayor, F. J. Efficient Finite Element Methodology Based on Cartesian Grids: Application to Structural Shape Optimization. Abstr. Appl. Anal. 2013, Special Issue (2013), Article ID 953786, 19 pages. doi:10.1155/2013/953786. https://projecteuclid.org/euclid.aaa/1393443491


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