Free vibration and dynamic stability of rotating thin-walled composite beams

2011 ◽  
Vol 30 (3) ◽  
pp. 432-441 ◽  
Author(s):  
C. Martín Saravia ◽  
Sebastián P. Machado ◽  
Víctor H. Cortínez
Keyword(s):  
Free Vibration ◽  
Dynamic Stability ◽  
Composite Beams ◽  
Thin Walled

Vibration of Beams with a Single Delamination under Axial Loading

2011 ◽  
Vol 675-677 ◽  
pp. 477-480
Author(s):  
Dong Wei Shu
Keyword(s):  
Free Vibration ◽  
Natural Frequency ◽  
Analytical Solutions ◽  
Axial Load ◽  
Natural Frequencies ◽  
Axial Loading ◽  
Composite Beams ◽  
Mode Shapes ◽  
Equilibrium Conditions ◽  
Monotonic Relation

In this work analytical solutions are developed to study the free vibration of composite beams under axial loading. The beam with a single delamination is modeled as four interconnected Euler-Bernoulli beams using the delamination as their boundary. The continuity and the equilibrium conditions are satisfied between the adjoining beams. The studies show that the sizes and the locations of the delaminations significantly influence the natural frequencies and mode shapes of the beam. A monotonic relation between the natural frequency and the axial load is predicted.

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