scholarly journals Detection of Cracks in a Cantilever Beam Using Signal Processing and Strain Energy Based Model

2017 ◽  
Vol 234 ◽  
pp. 012008 ◽  
Author(s):  
P Mehta ◽  
A Kureshi ◽  
S Lad ◽  
N Patel ◽  
D Sharma
Keyword(s):  
Signal Processing ◽  
Cantilever Beam ◽  
Strain Energy

Controllable Truss-Frame Nodes in Semi-Active Damping of Vibrations

2016 ◽  
Vol 101 ◽  
pp. 89-94 ◽  
Author(s):  
Blazej Poplawski ◽  
Cezary Graczykowski ◽  
Łukasz Jankowski
Keyword(s):  
Cantilever Beam ◽  
Control Strategy ◽  
Strain Energy ◽  
Vibration Mode ◽  
Vibration Damping ◽  
Active Damping ◽  
Active Management ◽  
Complex Structures ◽  
Published Research ◽  
Damping Of Vibrations

In recent years, vibration damping strategies based on semi-active management of strain energy have attracted a large interest and were proven highly effective. However, most of published research considers simple one degree of freedom systems or study the same basic example (the first vibration mode of a cantilever beam) with the same control strategy. This contribution focuses on truss-frame nodes with controllable moment-bearing ability. It proposes and tests an approach that allows the control strategy to be extended to more complex structures and vibration patterns.

Bending and Fracture Properties of Small Scale Elastic Beams – A Nonlocal Analysis

2012 ◽  
Vol 152-154 ◽  
pp. 1417-1426 ◽  
Author(s):  
Xiang Fang Li ◽  
Bao Lin Wang
Keyword(s):  
Energy Release Rate ◽  
Energy Release ◽  
Static Analysis ◽  
Cantilever Beam ◽  
Timoshenko Beam ◽  
Release Rate ◽  
Strain Energy ◽  
Strain Energy Release Rate ◽  
Strain Energy Release ◽  
Beam Model

Using the nonlocal elasticity theory, this paper presents a static analysis of a microbeam according to the Timoshenko beam model. A fourth-order governing differential equation is derived and a general solution is suggested. For a cantilever beam at nanoscale subjected to uniform distributed loading, explicit expressions for deflection, rotation and strain energy are obtained. The nonlocal effect decreases the deflection and maximum stress distribution. With a double cantilever beam model, the strain energy release rate of a cracked beam is evaluated, and the results obtained show that the strain energy release rate is decreased (hence an increased apparent fracture toughness is measured) when the beam thickness is several times the material characteristic length. However, in the absence of a uniformly distributed loading, the nonlocal beam theory fails to account for the size-dependent properties for static analysis. Particularly, the nonlocal Euler-Bernoulli beam can be analytically obtained from the nonlocal Timoshenko beam if the apparent shear modulus is sufficiently large.

scholarly journals Material of Structure affecting the Frequency Analysis using FEM Package

2012 ◽  
pp. 75-77
Author(s):  
JN Mahto ◽  
SC Roy ◽  
RS Prasad
Keyword(s):  
Cantilever Beam ◽  
Strain Energy ◽  
Numerical Data ◽  
Fem Analysis ◽  
Polynomial Equations ◽  
Numerical Techniques ◽  
Intermediate Data ◽  
Aluminium Copper ◽  
Modes Of Vibration ◽  
Fixed End

In the present investigation, efforts have been made to find effect material on cantilever beam under vibration. Specimens were modelled and analysed using FEM package (Abacus). Analysis was done by setting maximum frequency value as 60 Hz. It was found that a cantilever beam attains different modes of vibration. For mode-I of vibration the value of ‘strain energy’ and ‘deflection of beam’ along the cantilever beam from fixed end towards free end were obtained and tabulated. Aluminium, Copper and Steel were selected as three different materials for analysis. Numerical data obtained from FEM analysis were further tabulated and plotted for further useful analysis. Using numerical techniques, polynomial equations were also developed so that intermediate data can be determined.

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