Dynamic stability analysis of functionally graded epoxy/clay nanocomposite beams subjected to periodic axial loads

被引：0
作者：
M. Karami Khorramabadi
M. Mahdipour Jalilian
机构：
[1] Islamic Azad University,Department of Mechanical Engineering, Khorramabad Branch
[2] Islamic Azad University,Department of Mechanical Engineering, Kermanshah Branch
来源：
Journal of the Brazilian Society of Mechanical Sciences and Engineering | 2023年 / 45卷
关键词：
Dynamic stability; Functionally graded material (FGM); Nanocomposite; Epoxy; Genetic algorithm (GA);
D O I：
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中图分类号：
学科分类号：
摘要：
This paper presents the dynamic stability of simply supported functionally graded (FG) nanocomposite beams subjected to periodic axial compressive load. The specimens were fabricated and experimental tensile; buckling and vibration tests were performed on them. The elastic modulus of FG and uniform distribution (UD) nanocomposites were computed using genetic algorithm and compared with the experimental data. The obtained equation includes the effect of nanoparticles weight percentage for the elastic modulus of UD nanocomposite. Additionally, it was upgraded to take into account the elastic modulus of FG as a function of the thickness coordinate. By using the Hamilton's principle, the dynamic equation was obtained based on the first-order shear deformation beam theory. The equation was solved using the Harmonic balance method, and the mechanical buckling and free vibration analysis were also investigated as subset problems. The influences of nanoclay weight percentage, types of nanoclay distribution and dynamic load component on the dynamic stability properties of nanocomposite beams were studied. The theoretical analysis was compared with experimental data which showed good agreement with it.
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