On the construction of approximation space to model discontinuities and cracks with linear and quadratic extended finite elements

M. Ndeffo; P. Massin; N. Moës; A. Martin; S. Gopalakrishnan

doi:10.1186/s40323-017-0090-3

On the construction of approximation space to model discontinuities and cracks with linear and quadratic extended finite elements

M. Ndeffo
, P. Massin
, N. Moës
, A. Martin
, S. Gopalakrishnan

Research output: Contribution to journal › Article › peer-review

Abstract

This paper presents a robust enrichment strategy to model weak and strong discontinuities as well as cracks for industrial applications. First, numerical issues encountered with popular extended finite element approximation spaces are pointed out. Then, the paper gives indications on how to circumvent those issues. The very originality of the paper relies on questioning the theoretical approximation spaces with respect to numerical results and to modify accordingly their design. The relationship between the new design and the previous designs is clearly established, in order to highlight the very small implementation cost of the modifications exposed here. Hence with minimal additional computational cost, gains in accuracy can be significant as shown later in the paper.

Original language	English
Article number	6
Journal	Advanced Modeling and Simulation in Engineering Sciences
Volume	4
Issue number	1
DOIs	https://doi.org/10.1186/s40323-017-0090-3
Publication status	Published - 1 Dec 2017

Keywords

Condition number
Fracture
GFEM
Quadratic elements
SGFEM
X-FEM

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10.1186/s40323-017-0090-3

Cite this

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abstract = "This paper presents a robust enrichment strategy to model weak and strong discontinuities as well as cracks for industrial applications. First, numerical issues encountered with popular extended finite element approximation spaces are pointed out. Then, the paper gives indications on how to circumvent those issues. The very originality of the paper relies on questioning the theoretical approximation spaces with respect to numerical results and to modify accordingly their design. The relationship between the new design and the previous designs is clearly established, in order to highlight the very small implementation cost of the modifications exposed here. Hence with minimal additional computational cost, gains in accuracy can be significant as shown later in the paper.",

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AU - Ndeffo, M.

AU - Massin, P.

AU - Moës, N.

AU - Martin, A.

AU - Gopalakrishnan, S.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - This paper presents a robust enrichment strategy to model weak and strong discontinuities as well as cracks for industrial applications. First, numerical issues encountered with popular extended finite element approximation spaces are pointed out. Then, the paper gives indications on how to circumvent those issues. The very originality of the paper relies on questioning the theoretical approximation spaces with respect to numerical results and to modify accordingly their design. The relationship between the new design and the previous designs is clearly established, in order to highlight the very small implementation cost of the modifications exposed here. Hence with minimal additional computational cost, gains in accuracy can be significant as shown later in the paper.

AB - This paper presents a robust enrichment strategy to model weak and strong discontinuities as well as cracks for industrial applications. First, numerical issues encountered with popular extended finite element approximation spaces are pointed out. Then, the paper gives indications on how to circumvent those issues. The very originality of the paper relies on questioning the theoretical approximation spaces with respect to numerical results and to modify accordingly their design. The relationship between the new design and the previous designs is clearly established, in order to highlight the very small implementation cost of the modifications exposed here. Hence with minimal additional computational cost, gains in accuracy can be significant as shown later in the paper.

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KW - Fracture

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KW - Quadratic elements

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KW - X-FEM

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On the construction of approximation space to model discontinuities and cracks with linear and quadratic extended finite elements

Abstract

Keywords

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