Wavelet spectral finite element based user-defined element in ABAQUS for modeling delamination in composite beams

Khalili, A and Samaratunga, D and Jha, R and Lacy, TE and Gopalakrishnanrth, S (2015) Wavelet spectral finite element based user-defined element in ABAQUS for modeling delamination in composite beams. In: 23rd AIAA/AHS Adaptive Structures Conference, 5-9 January 2015, Kissimmee, Florida, USA.

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Abstract

Wave propagation in a delaminated composite beam is investigated using the wavelet spectral finite element (WSFE) method. WSFE-based elements are implemented in Abaqus ® through the user-defined element (UEL) option. Since Abaqus ® operations can use real values only, all complex numbers in WSFE model are decoupled into real and imaginary parts and their real numbers are used in the computations. Final solution is obtained by forming a complex value using the two real number solutions. For modeling delamination, a beam is divided into two base-laminates (for parts of the beam without delamination) and two sub-laminates covering the delamination zone. Multi-point constraint (MPC) subroutine in Abaqus ® is used to define the displacement relation between nodes of these four parts of the delaminated beam. Wave motion predicted by the UEL is validated with 2D finite element method (FEM) analysis using Abaqus ®. The developed UEL largely retains computational efficiency of the WSFE method and extends its ability to model complex features (such as a delamination). © 2015, by the American Institute.

Item Type:	Conference Paper
Publication:	23rd AIAA/AHS Adaptive Structures Conference
Publisher:	American Institute of Aeronautics and Astronautics Inc.
Additional Information:	cited By 5; Conference of 23nd AIAA/AHS Adaptive Structures Conference 2015 ; Conference Date: 5 January 2015 Through 9 January 2015; Conference Code:112959
Keywords:	ABAQUS; Composite beams and girders; Computational efficiency; Wave propagation; Wavelet analysis, 2-D finite-element methods; Delaminated beams; Delaminated composite beams; Delamination zone; Model complexes; Multi point constraints; Real and imaginary; Spectral finite elements, Finite element method
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	12 Oct 2020 10:42
Last Modified:	12 Oct 2020 10:42
URI:	http://eprints.iisc.ac.in/id/eprint/66023

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