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Nitsche’s method for non-conforming multipatch coupling in hyperelastic isogeometric analysis

  • Xiaoxiao Du
  • Gang Zhao
  • Wei WangEmail author
  • Howie Fang
Original Paper
  • 178 Downloads

Abstract

Complex geometric models are usually built with multiple NURBS patches with non-conforming interfaces, which bring difficulties within the isogeometric analysis. In this paper, Nitsche’s method is employed to glue different patches for nonlinear isogeometric analysis of hyperelastic material models which are widely used to describe the material behavior of rubbers, foams, biological tissues, etc. Nitsche based weakly governing equations and discretized stiffness matrices are detailedly developed in total Lagrangian form for isogeometric implementation. Different popular hyperelastic materials including Neo–Hookean, Mooney–Rivlin and Yeoh materials are employed for derivation. The Legendre–Gauss quadrature rule is used for numerical calculation. Several numerical examples in two dimensions are performed and compared with the results from commercial software to verify the validity of the proposed method and show the prospect in solving engineering problems.

Keywords

Nitsche’s method Multipatch coupling Nonlinear isogeometric analysis Hyperelastic materials 

Notes

Acknowledgements

The work is supported by the Natural Science Foundation of China (Project Nos. 61572056 and 61972011).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Mechanical Engineering and AutomationBeihang UniversityBeijingChina
  2. 2.Department of Mechanical Engineering and Engineering ScienceThe University of North Carolina at CharlotteCharlotteUSA

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