Finite Element Modeling and Analysis of a De-bonded Smart Beam in Actuatio
Mohammad Mursaleen Butt1, Sheikh Nazir Ahmad2, Abdulrehman A. Al-Robaian3, Sher Afghan Khan4

1Mohammad Mursaleen Butt, Department of Mechanical Engineering, NIT Srinagar India.
2Sheikh Nazir Ahmad, Department of Mechanical Engineering, National Institute of Technology Kashmir, India.
3Abdulrehman A. Al-Robaian, Department of Mechanical Engineering, Qassim University, Buraidah, Saudi Arabia.
4Sher Afghan Khan, Department of Mechanical Engineering, Faculty of Engineering, International Islamic University, Kuala Lumpur, Malaysia.
Manuscript received on 22 March 2019 | Revised Manuscript received on 03 April 2019 | Manuscript Published on 18 April 2019 | PP: 258-263 | Volume-7 Issue-6S March 2019 | Retrieval Number: F02500376S19/2019©BEIESP
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Abstract: Stress, strain and displacement-based analysis of smart beam with debonding under actuation has been carried out. In this regard variational formulation based finite element modeling of a smart beam under actuation with debonding on the top and a bottom piezo layer has been developed. To know the proper functioning of the model, debonding at the center of the span and one-third of the span at the top and bottom interfaces between core and the piezo patches has been considered. Higher order beam bending for both host and piezo layers has been incorporated in the model. Due to debonding the number of degrees of freedom increase according to the number of elements considered along debonding portion. It can be observed that the results exhibit symmetry about centroidal axis which guarantees that the finite element model functions satisfactorily. Electric field along longitudinal and transverse directions does not change with regards to bonding and debonding in actuation. The pattern of axial displacement, normal strain and normal stress through thickness along span is found to be not affected by the debonding in actuation which is contrary to sensing. Which means the smart beam with debonding does not degenerate in actuation for axial displacement, normal stress and normal strain. The magnitudes of shear stress and shear strain at the root are minimum as compared to the magnitudes at the tip of the smart cantilever. However, the difference between bonding and debonding with regards to shear stress and shear strain is predominant at the root than at the tip. Which means the smart beam does not degenerate in debonding with regards to shear strain and shear stress.
Keywords: Smart Beam; Polarization; PZT-5H; Debonding.
Scope of the Article: Mechanical Maintenance