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Numerical integration in the virtual element method with the scaled boundary cubature scheme

Journal Article · · International Journal for Numerical Methods in Engineering
DOI:https://doi.org/10.1002/nme.7549· OSTI ID:2391042
 [1];  [2];  [3];  [4]
  1. Lawrence Livermore National Laboratory Livermore California USA
  2. Dipartimento di Matematica e Applicazioni Università di Milano‐Bicocca Milan Italy
  3. Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico USA
  4. Department of Civil and Environmental Engineering University of California Davis California USA
Abstract

The virtual element method (VEM) is a stabilized Galerkin method on meshes that consist of arbitrary (convex and nonconvex) polygonal and polyhedral elements. A crucial ingredient in the implementation of low‐ and high‐order VEM is the numerical integration of monomials and nonpolynomial functions over such elements. In this article, we apply the recently proposed scaled boundary cubature (SBC) scheme to compute the weak form integrals in various virtual element formulations over polygonal and polyhedral meshes. In doing so, we demonstrate the flexibility of the approach and the accuracy that it delivers on a broad suite of boundary‐value problems in 2D and 3D over polytopes with affine faces as well as on elements with curved boundaries. In addition, the use of the SBC scheme is exemplified in an enriched Poisson formulation of the VEM in which weakly singular functions are required to be integrated. This study establishes the SBC method as a simple, accurate and efficient integration scheme for use in the VEM.

Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001; AC52-07NA27344
OSTI ID:
2391042
Journal Information:
International Journal for Numerical Methods in Engineering, Journal Name: International Journal for Numerical Methods in Engineering; ISSN 0029-5981
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

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