Models for structural damping for laminated beams due to interfacial slip

1994 ◽  
Author(s):  
Scott W. Hansen
Keyword(s):  
Interfacial Slip ◽  
Structural Damping ◽  
Laminated Beams

scholarly journals EXPONENTIAL STABILITY OF LAMINATED BEAM WITH CONSTANT DELAY FEEDBACK

2021 ◽  
Vol 26 (4) ◽  
pp. 566-581
Author(s):  
Kassimu Mpungu ◽  
Tijani A. Apalara
Keyword(s):  
Wave Propagation ◽  
Exponential Stability ◽  
Propagation Speed ◽  
Transverse Displacement ◽  
Structural Damping ◽  
Constant Delay ◽  
Laminated Beams ◽  
Laminated Beam ◽  
Delay Term ◽  
Wave Propagation Speed

In this article, we consider a system of laminated beams with an internal constant delay term in the transverse displacement. We prove that the dissipation through structural damping at the interface is strong enough to exponentially stabilize the system under suitable assumptions on delay feedback and coefficients of wave propagation speed.

A Study on Damping of Laminated Beams by Modal Analysis

2013 ◽  
Vol 550 ◽  
pp. 33-40
Author(s):  
Djamel Bensahal ◽  
Mohamed Nadir Amrane ◽  
Mounir Kharoubi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Modal Analysis ◽  
Beam Element ◽  
Structural Damping ◽  
The Finite Element Method ◽  
Cyclic Tests ◽  
Laminated Beams ◽  
The Difference ◽  
Element Method

The paper presents an analysis of the damping of laminated beams with four different stacking sequences. The experimental investigation was conducted using tensile cyclic tests for different laminates studied. The impulse technique was chosen to perform modal analysis of the ease of implementation and quickness of the test. The numerical analysis is performed by the finite element method using beam element. The difference between strain energies for both cases damaged and undamaged are calculated by the finite element method. The structural damping of the different beams is evaluated from these energies. The decrease in frequency for different rates of loading shows the loss of stiffness for all materials studied.

scholarly journals On a Laminated Timoshenko Beam with Nonlinear Structural Damping

2020 ◽  
Vol 25 (2) ◽  
pp. 35
Author(s):  
Tijani A. Apalara ◽  
Aminu M. Nass ◽  
Hamdan Al Sulaimani
Keyword(s):  
Timoshenko Beam ◽  
Convex Functions ◽  
Nonlinear Term ◽  
Interfacial Slip ◽  
Structural Damping ◽  
Damping Term ◽  
Wave Speeds ◽  
Boundary Damping ◽  
One Dimensional ◽  
Nonlinear Structural

In the present work, we study a one-dimensional laminated Timoshenko beam with a single nonlinear structural damping due to interfacial slip. We use the multiplier method and some properties of convex functions to establish an explicit and general decay result. Interestingly, the result is established without any additional internal or boundary damping term and without imposing any restrictive growth assumption on the nonlinear term, provided the wave speeds of the first equations of the system are equal.

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