Journal
THIN-WALLED STRUCTURES
Volume 158, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2020.107161
Keywords
Flutter; Matrix crack; Laminated composite plates; Graphene nanoplatelets; Element-free IMLS-Ritz method
Categories
Funding
- National Natural Science Foundation of China [11672187]
- Ministry of Science and Higher Education, Poland
- [W/WM-IIM/3/2020]
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This study investigates graphene nanoplatelets reinforced composite with matrix cracks using element-free IMLS-Ritz method. The analysis includes determining the effective Young's modulus of each layer, predicting Poisson's ratio and mass density, and modeling the degraded stiffness of cracked layers. The study also examines the accuracy of the results and conducts a comprehensive parametric study on the effects of matrix crack density, distribution pattern, and other factors on the flutter bound of the plates.
This paper investigates graphene nanoplatelets (GPLs) reinforced composite (GPLRC) with matrix cracks by using element-free IMLS-Ritz method. The effective Young's modulus of each GPLRC layer is determined by the modified Halpin-Tsai micromechanics model while its Poisson's ratio and mass density are predicted according to the rule of mixtures. The degraded stiffness of cracked layers is modeled via the self-consistent micromechanical model. The first-order shear deformation theory and first-order piston theory are employed to formulate aeroelastic model. Element-free IMLS-Ritz method is applied to discretize the equation of motion. The accuracy of the IMLS-Ritz results is examined by comparing the natural frequency and critical aerodynamic pressure with those obtained from published values. A comprehensive parametric study is carried out, with a particular focus on the effects of matrix crack density, distribution pattern, weight fraction, total number of layers, geometry of GPLs, and aspect ratio of plates on the flutter bound of matrix cracked GPLRC plates.
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