Identification of material properties of composite plates using Fourier-generated frequency response functions

ABSTRACT

The present research adopts the use of Fourier-based plate model to synthesize FRFs for its proven prominent accuracy and incorporates with a hybrid optimization algorithm. The effectiveness of FRF error function in material identification consists in the trade-off range between those of natural frequency error function and mode shape error function with about 7% reduction in absolute relative error of the evaluated elastic moduli and shear modulus with respect to those of mode shape error function as well as approximately 25% reduction in absolute relative error of the identified Poisson's ratio with respect to that of natural frequency error function.

KEYWORDS:

• Frequency Response Function (FRF)
• hybrid algorithm
• material identification
• mode shape
• natural frequency

Funding

The authors wish to acknowledge the financial support and advice given by Postgraduate Research Fund (PG009-2015A), Fundamental Research Grant Scheme (FP010-2014A), Advanced Shock and Vibration Research (ASVR) Group of University of Malaya, and other project collaborators.