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FGM paper – journal of composite structure

For vıewıng my new paper, you can check this file :

FGM paper.pdf




This paper presents an electromechanical modeling approach for predicting the dynamics of (straight/curved) functionally graded panels with multiple surface-integrated piezo-patches. Bi-axial material variation is considered using the theory of mixture approach. The governing equations are derived following the first-order shear deformation theory and Hamilton’s principle. The derived boundary value problem is solved numerically using a meshless approach based on Chebyshev polynomials. Mass and stiffness contributions of piezo-patch(es), as well as two-way electromechanical coupling behavior, are incorporated both for modal and harmonic analyses. To validate the accuracy of the presented solution technique, the results for various cases are compared to those obtained from finite-element analyses. It is shown that the maximum difference in the predicted natural frequencies is below 1%, but for a fraction of the computational time. Furthermore, the harmonic analysis results excellently match FE results. Note that material variation changes the spatial stiffness of the panel and thus, the functionally graded panel can be designed according to a predefined objective function using the proposed modeling approach. As a demonstration, specific to energy harvesting application, the voltage/power output was maximized through material and geometry/shape variations. It was demonstrated that significant improvements can be achieved through the presented methodology.

Posted by peyman.lahe on Mar 23rd 2021 | Filed in Extra files | Comments (0)


Dr. Peyman Lahe Motlagh is a Postdoctoral fellow at the Faculty of Engineering and Natural Sciences, Sabanci University, Turkey. He received his Ph.D. degree in 2020 from Koc university in the field of Vibration and Acoustic with a focus on Smart materials in Energy Harvesting applications in the department of mechanical engineering. During his Ph.D. studies, he worked on modeling and implementation of smart materials with a focus on energy harvesting and shunt damping. He obtained the MSc in 2014 from the Mechanical Engineering Department at Sharif University of technology, modeling nonlinear materials in vibration on tires and investigating the viscoelastic behavior of rubbers. He obtained the BSc in 2012 from the Mechanical Engineering Department at Sharif university of technology. Dr. Lahe’s areas of expertise involve computational mechanics and engineering involving Spectral Tchebychev modeling of complex multiphysics systems, modeling and experimental validation of viscoelastic materials, smart materials implementation with the focus of energy harvesting, modeling of composite structures such as functionally graded materials and laminated sandwich panels. He is author/co-author of more than 5 journal articles published in high-impact journals, and also prepared and presented over 3 conference papers on these topics, published 4 books chapter about modeling and implementation of modeling in structural dynamics.
Dr. Peyman Lahe currently works in the field of modeling crack propagation, topology optimization, and also the implementation of optimization algorithms for increasing energy harvesting on composite structures.

Posted by peyman.lahe on Mar 23rd 2021 | Filed in Information | Comments (0)