Free vibration of composite sandwich plates and cylindrical shells

2017 ◽  
Vol 171 ◽  
pp. 528-537 ◽  
Author(s):  
Chyanbin Hwu ◽  
H.W. Hsu ◽  
Y.H. Lin
Keyword(s):  
Free Vibration ◽  
Cylindrical Shells ◽  
Sandwich Plates ◽  
Composite Sandwich ◽  
Composite Sandwich Plates

Free Vibration of Thermally Buckled Composite Sandwich Plates

2005 ◽  
Vol 128 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Le-Chung Shiau ◽  
Shih-Yao Kuo
Keyword(s):  
Free Vibration ◽  
Vibration Mode ◽  
Free Vibration Analysis ◽  
Sandwich Plates ◽  
Vibration Modes ◽  
Buckling Mode ◽  
Composite Sandwich ◽  
Plate Buckling ◽  
Pattern Change ◽  
Composite Sandwich Plates

A high precision triangular plate element is developed for the free vibration analysis of thermally buckled composite sandwich plates. Due to an uneven thermal expansion in the two principal material directions, the buckling mode of the plate may change from one pattern to another in the postbuckling region for certain fiber orientation and aspect ratio of the plate. Because of this buckle pattern change, the sequence of natural frequencies of the plate is also suddenly altered. By examining the buckling and free vibration modes of the plate, a clear picture of buckle pattern change and vibration mode shifting is presented. Numerical results show that if the shape of a free vibration mode is similar to the plate buckling mode then the natural frequency of that mode will drop to zero when the temperature reaches the buckling temperature.

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