EFFECT OF HOLE SHAPE ON FREE VIBRATION CHARACTERISTICS OF UNIDIRECTIONAL  COMPOSITE PLATES.

Mohsin Abdullah Al-Shammari, Dr.

	EFFECT OF HOLE SHAPE ON FREE VIBRATION CHARACTERISTICS OF UNIDIRECTIONAL COMPOSITE PLATES.
Iraqi journal of mechanical and material engineering
Article 1, Volume 15, Issue 1, 2015, Pages 31-48
Author
Dr. Mohsin Abdullah Al-Shammari
Abstract
In this research, a free vibration of unidirectional composite laminated plate with different holes shape effect investigation is done experimentally and numerically. The natural frequency and deflection response of a unidirectional composite plate are studied with different holes shape effect as (rectangular or triangular or square or ellipse or circular shape, for simply supported and clamped composite laminated plate boundary conditions. This effect is studied for different shape cutout with the same area of different cutout shapes. The results of natural frequency evaluated by experimental work are compared with those evaluated by numerical method using a finite element method, (ANSYS program Ver. 14). The deflection of composite laminated plate with different holes effect is evaluated using finite element method. The results showed that the maximum natural frequency of unidirectional composite plate occurs at the clamped supported boundary composite plate with circular cutout. The experimental results of natural frequency of composite plate with different cutout shape are compared with those obtained using FEM. The comparison of results showed that the maximum discrepancy between experimental and numerical natural frequency is about (14.85%).
Keywords
Holes; Plates; vibration; FEM

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