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Title
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Dynamic analysis of prismatic auxetic trigonometric rotating blades integrated by GNPs-reinforced layers
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Type
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JournalPaper
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Keywords
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Prismatic blades, vibrational performance, sandwich structures, graphene nanoplatelets, auxetic materials
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Abstract
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This study presents a comprehensive investigation into the free vibration behavior of rotating prismatic sandwich blades with linearly varying thicknesses. The blade structure features an auxetic core and graphene nanoplatelet (GNP)-reinforced composite face sheets. Various GNP dispersion patterns—uniform and functionally graded—are considered along the blade height. Due to the anisotropic and spatially varying nature of the material reinforcement, stress transformation techniques are applied at specific angles to determine the effective material properties. The governing equations of motion are derived using Hamilton’s principle and the variational approach, incorporating the effects of geometric nonuniformity and material gradation. These equations are numerically solved using the generalized differential quadrature method (GDQM), a high-accuracy numerical technique suitable for such complex systems. Parametric studies are conducted to examine the influence of transformation angle, GNP distribution pattern, auxetic geometry, rotational speed, and structural geometry on the natural frequencies. The results provide valuable insights for the optimized design of high-performance rotating structural components.
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Researchers
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Zahra Khoddami Maraghi (Second Researcher), Ehsan Arshid (First Researcher)
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