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research-article

UV-activated Frequency Control of Beams and Plates Based on Isogeometric Analysis

[+] Author and Article Information
Yujie Guo

Interdisciplinary Research Institute of Aeronautics and Astronautics, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China; Room 207, Building A18, #29 Yu Dao Street, Nanjing, 210016, P.R. China
yujieguo@nuaa.edu.cn

Hornsen Tzou

Interdisciplinary Research Institute of Aeronautics and Astronautics, College of Aerospace Engineering, State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China; Room 202, Building A18, #29 Yu Dao Street, Nanjing, 210016, P.R. China
hstzou@nuaa.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4038948 History: Received June 28, 2017; Revised December 18, 2017

Abstract

A new LaSMP smart material exhibits shape memory behaviors and stiffness variation via UV light exposures. This dynamic stiffness provides a new noncontact actuation mechanism for engineering structures. Isogeometric analysis (IGA) utilizes high order and high continuity NURBS as basis functions which naturally fulfills C1-continuity requirement of Euler-Bernoulli beam and Kirchhoff plate theories. Compared with the traditional finite elements of beams and plates, IGA does not need extra rotational degrees of freedom while providing accurate results. The UV light-activated frequency control of LaSMP fully and partially laminated beam and plate structures based on the isogeometric analysis is presented in this study. For the analysis of LaSMP partially laminated plates, the finite cell approach in the framework of IGA is proposed to handle NURBS geometries containing trimming features. The accuracy and efficiency of the proposed isogeometric approach are demonstrated via several numerical examples in frequency control. The results show that, with LaSMPs, broadband frequency control of beam and plate structures can be realized. Furthermore, changing LaSMP patch sizes on beams and plates further broadens its frequency control ranges. Studies suggest that 1) the newly developed IGA combining finite cell approach is an effective numerical tool and 2) the maximum frequency manipulation ratios of beam and plate structures respectively reach 24.30% and 16.75%, which demonstrates the feasibility of LaSMPs induced vibration control of structures.

Copyright (c) 2017 by ASME
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