Volume 105, Issue 2 e202400877
ORIGINAL PAPER

An efficient finite element method for computing the response of a strain-limiting elastic solid containing a V-notch and inclusions

G. Shylaja

G. Shylaja

Department of Mathematics, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, India

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V. Kesavulu Naidu

Corresponding Author

V. Kesavulu Naidu

Department of Mathematics, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, India

Correspondence

V. Kesavulu Naidu, Department of Mathematics, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, 560035, India.

Email: [email protected]

S. M. Mallikarjunaiah, Department of Mathematics, and Statistics, Texas A&M University-Corpus Christi, Corpus Christi, TX 78412, USA. Email: [email protected]

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B. Venkatesh

B. Venkatesh

Department of Mathematics, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, India

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S. M. Mallikarjunaiah

Corresponding Author

S. M. Mallikarjunaiah

Department of Mathematics & Statistics, Texas A&M University-Corpus Christi, Corpus Christi, Texas, USA

Correspondence

V. Kesavulu Naidu, Department of Mathematics, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, 560035, India.

Email: [email protected]

S. M. Mallikarjunaiah, Department of Mathematics, and Statistics, Texas A&M University-Corpus Christi, Corpus Christi, TX 78412, USA. Email: [email protected]

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First published: 11 February 2025

Abstract

The precise triangulation of the domain assumes a critical role in calculating numerical approximations of differential operators utilizing a collocation method. A well-executed triangulation contributes significantly to the reduction of discretization errors. Conventional collocation techniques typically represent the smooth curved domain by triangulating a mesh, wherein boundary points are approximated using polygons. However, this methodology frequently introduces geometrical errors that adversely impact the accuracy of the numerical approximation. To mitigate such geometrical inaccuracies, isoparametric, subparametric, and iso-geometric methods have been proposed, facilitating the approximation of curved surfaces or line segments. This paper proposes an efficient finite element method tailored to approximate the elliptic boundary value problem (BVP) solution that governs the response of an elastic solid containing a V-notch and inclusions. The algebraically nonlinear constitutive equation and the balance of linear momentum are reduced to a second-order quasi-linear elliptic partial differential equation. Our approach encompasses the representation of complex curved boundaries through a smooth, distinctive point transformation. The principal objective is to utilize higher-order shape functions to accurately compute the entries within the finite element matrices and vectors and obtain a precise approximate solution to the BVP. A Picard-type linearization addresses the nonlinearities inherent in the governing differential equation. Numerical results derived from the test cases demonstrate a significant enhancement in accuracy.

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