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Advances in Materials Research Volume 15, Number 3, August 2026 , pages 225-247 DOI: https://doi.org/10.12989/amr.2026.15.3.02 |
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Investigation of dynamic performance in porous power-law and sigmoid functionally graded sandwich plates |
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Ahmed Keddouri, Nafissa Zouatnia, Lazreg Hadji, Royal Madan, Hassen Ait Atmane, Rohit Kumar Singh Gautam, Atteshamuddin S. Sayyad
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| Abstract | ||
| In the present study, dynamic bihavior analysis of sandwich plate has been performed by employing refined shear deformation plate theory. Novel imperfections types are studied which may arise during fabrication and are named as even porosity, uneven porosity, logarithmic-uneven porosities, linear-uneven porosities. The material gradation along the direction of thickness is taken as per power law (P-FGM) and sigmoid law (S-FGM). The face layers are modeled as functionally graded (FG) across their thickness, while the core consists of a homogeneous ceramic layer. The governing equations are formulated using Hamilton's principle, and a closed-form solution for a simply supported rectangular plate is derived through the Navier method. Extensive parametric study to investigate the natural frequency have been performed for different side to thickness ratio (a/h), aspect ratio (a/b) and porosity parameters ( | ||
| Key Words | ||
| dynamic behavior; functionally graded materials; Navier's method; porosity; refined plate theory | ||
| Address | ||
| Ahmed Keddouri: Faculty of Natural and Life Sciences, Department of Earth and Universe Sciences, Ziane Achour University of Djelfa, Algeria Nafissa Zouatnia: Department of Civil Engineering, University of Tiaret, 14000 Tiaret, Algeria Lazreg Hadji: Department of Civil Engineering, University of Tiaret, 14000 Tiaret, Algeria/ Suleyman Demirel University, Isparta, 32260, Turkiye Royal Madan: Department of Mechanical Engineering, Graphic Era (Deemed to be University), Dehradun, India Hassen Ait Atmane: Laboratory of Structures, Geotechnics and Risks, Department of Civil Engineering, Hassiba Benbouali University of Chlef, Chlef, Algeria Rohit Kumar Singh Gautam: Department of Mechanical Engineering, Teerthanker Mahaveer University, Moradabad, 244001, India Atteshamuddin S. Sayyad: Department of Structural Engineering, Sanjivani College of Engineering Kopargaon, Savitribai Phule Pune University, Kopargaon, Maharashtra, India | ||
