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Performance assessment of the augmented finite element method for the modeling of weak discontinuities
Language
EN
Article de revue
This item was published in
International Journal for Numerical Methods in Engineering. 2020-08-25
English Abstract
This paper investigates the convergence properties of the augmented finite element method (AFEM). The AFEM is here used to model weak discontinuities independently of the underlying mesh. One noticeable advantage of the ...Read more >
This paper investigates the convergence properties of the augmented finite element method (AFEM). The AFEM is here used to model weak discontinuities independently of the underlying mesh. One noticeable advantage of the AFEM over other partition of unity methods is that it does not introduce additional global unknowns. Numerical 2D experiments illustrate the performance of the method and draw comparisons with the finite element method (FEM) and the non conforming FEM. It is shown that the AFEM converges with an error of O(ℎ0.5) in the energy norm. The non-conforming FEM shares the same property while the FEM converges at O(ℎ). Yet, the AFEM is on par with the FEM for certain homogenization problems.Read less <
English Keywords
Embedded discontinuities
Embedded finite elements
Weak discontinuities
Augmented finite element method