Inverse Identification of Composite Material Properties by using a Two-Stage Fourier Method

Tam, Jun Hui and Ong, Zhi Chao and Ismail, Zubaidah and Ang, Bee Chin and Khoo, Shin Yee (2018) Inverse Identification of Composite Material Properties by using a Two-Stage Fourier Method. Experimental Mechanics, 58 (6). pp. 963-981. ISSN 0014-4851, DOI

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This study presents a feasible identification method for composite materials that adopts the combined use of the Fourier method, a weighted least squares method and the mode shape error function. The deflection shape function of the plate structure is defined in terms of 2D Fourier cosine series which is supplemented with several one-dimensional additional terms to accommodate general boundary conditions. The derivatives of mode shape with respect to the flexural rigidity are derived and computed from the model’s displacement function. A difference exists in the means of obtaining the mode shape derivatives between the present approach and the commonly used finite element model updating method. This research proposes a two-stage identification approach, in which the natural frequency error function is utilised in stage 1. In stage 2, the mode shape error function is used, which is proven vital in improving the accuracy of the in-plane shear modulus and Poisson’s ratio by at most 13%.

Item Type: Article
Funders: University of Malaya Research Grant (RP013B-15SUS), Fundamental Research Grant Scheme (FP010-2014A), Advanced Shock and Vibration Research (ASVR) Group of University of Malaya, Postgraduate Research Fund (PG009-2015A)
Uncontrolled Keywords: Composites; Fourier method; Material properties; Mode shapes; Nondestructive evaluation
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 04 Mar 2019 02:45
Last Modified: 04 Mar 2019 02:45

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