Pumping potential of a hyperbolic shell-of-revolution flexible-matrix-composite structure

2013 ◽  
Vol 95 ◽  
pp. 10-15 ◽  
Author(s):  
H. Ghoneim ◽  
Sakif Noor
Keyword(s):  
Matrix Composite ◽  
Composite Structure ◽  
Shell Of Revolution ◽  
Flexible Matrix Composite

Evaluation of the Pumping Action of a Barrel-Shaped Composite Shell Structure

2009 ◽  
Author(s):  
Hany Ghoneim ◽  
Tiago Santos
Keyword(s):  
Action Potential ◽  
Large Deformation ◽  
Matrix Composite ◽  
Composite Structure ◽  
Shell Structure ◽  
Composite Shell ◽  
Shell Of Revolution ◽  
Flexible Matrix Composite ◽  
Axial Stretching ◽  
Composite Shell Structure

This paper evaluates the pumping-action potential of a flexible-matrix-composite barrel-shaped shell-of-revolution structure. The pumping-action potential is defined by the relative radial reduction due to a specific applied axial stretching. The fundamental concept of the investigated pumping action is based on the phenomenon that angle-ply fibrous flexible-matrix-composites, with fiber angle orientation of [±θf], can exhibit unprecedented high values of the in-plane Poisson’s ratio. Consequently, upon stretching an angle-ply flexible-matrix-composite axisymmetric shell-of-revolution structure, a substantial reduction in its diameter can be realized and a potential pumping action is provided. In the current paper, the effect of the large deformation on the pumping action of a barrel-shaped (concaved-out) shell-of-revolution composite structure is evaluated. A mathematical model governing the large deformation of an axisymmetric barrel-shaped shell-of-revolution flexible-matrix-composite structure is presented and the response due to axial stretching, for different barrel curvature (maximum diameter), is found using the B-spline collocation numerical technique. In addition, a limited, preliminary experimental work is presented. A carbon/polyurethane barrel-shaped shell-of-revolution structure is constructed, and tested using the Tinius-Olsen testing machine. The crude preliminary results are compared with the corresponding analytical ones, and a discussion of the analytical/experimental results and their implications are addressed. The investigation demonstrates that a barrel-shaped angle-ply flexible-matrix-composite shell structure possesses a relatively high pumping potential.

scholarly journals Hydrogel core flexible matrix composite (H-FMC) actuators: theory and preliminary modelling

2014 ◽  
Vol 23 (9) ◽  
pp. 095021 ◽  
Author(s):  
M P M Dicker ◽  
P M Weaver ◽  
J M Rossiter ◽  
I P Bond
Keyword(s):  
Matrix Composite ◽  
Flexible Matrix Composite

Fluidic flexible matrix composite damping treatment for a cantilever beam

2015 ◽  
Vol 340 ◽  
pp. 80-94 ◽  
Author(s):  
Bin Zhu ◽  
Christopher D. Rahn ◽  
Charles E. Bakis
Keyword(s):  
Cantilever Beam ◽  
Matrix Composite ◽  
Flexible Matrix Composite

Nonlinear Ultrasonic Techniques for Testing Micro-Defects in Metal Matrix Composite Structure

2011 ◽  
Vol 483 ◽  
pp. 784-788
Author(s):  
Yi Dun ◽  
Shuan Jie Wang ◽  
Xiao Hong Shi ◽  
Zhao Ying Zhou
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Composite Structure ◽  
Acoustic Waves ◽  
Metal Matrix ◽  
Amplitude Ratio ◽  
Second Harmonic ◽  
Harmonic Amplitude ◽  
Acoustic Features ◽  
Nonlinear Acoustic

Micro-defects inside metal matrix composite structure seriously influence the mechanic properties of materials and can undermine machine operations. In order to detect the micro-defects, we can make use of one of the nonlinear acoustic features, i.e., harmonics, which usually appear together with ultrasound when propagating through a damaged material. Based on the relationship between the harmonics, a method of using nonlinear acoustic harmonic amplitude ratio to distinguish micro-defects in metal matrix composite structure is discussed. The test results show that acoustic features, such as second harmonic excitation efficiency were very obvious for the damaged group samples. The method presented is effective in detecting the micro-defects, which means that nonlinear acoustic waves may provide us a good solution for quantitative evaluation of the early damages in metal matrix composite structure.

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