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A level-set based IGA formulation for topology optimization of flexoelectric materials

hd_ghasemi@yahoo.com's picture

Abstract

This paper presents a design methodology based on a combination of isogeometric analysis (IGA),

level set and point wise density mapping techniques for topology optimization of piezoelectric /

flexoelectric materials. The fourth order partial differential equations (PDEs) of flexoelectricity,

which require at least C 1 continuous approximations, are discretized using Non-Uniform Rational

B-spline (NURBS). The point wise density mapping technique with consistent derivatives is

directly used in the weak form of the governing equations. The boundary of the design domain is

implicitly represented by a level set function. The accuracy of the IGA model is confirmed through

numerical examples including a cantilever beam under a point load and a truncated pyramid under

compression with different electrical boundary conditions. Finally, we provide numerical

examples demonstrating the significant enhancement in electromechanical coupling coefficient

that can be obtained using topology optimization.

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