Seismic response of functionally graded-carbon nanotubes-reinforced submerged viscoelastic cylindrical shell in hygrothermal environment

2018 ◽  
Vol 102 ◽  
pp. 101-109 ◽  
Author(s):  
Hadi Hosseini ◽  
Reza Kolahchi
Keyword(s):  
Carbon Nanotubes ◽  
Cylindrical Shell ◽  
Seismic Response ◽  
Functionally Graded ◽  
Viscoelastic Cylindrical Shell ◽  
Hygrothermal Environment ◽  
Functionally Graded Carbon Nanotubes

Dynamic Instability of Functionally Graded Carbon Nanotubes-Reinforced Composite Joined Conical-Cylindrical Shell

2021 ◽  
Author(s):  
B. Uspensky ◽  
K. Avramov ◽  
N. Sakhno ◽  
O. Nikonov
Keyword(s):  
Carbon Nanotubes ◽  
Cylindrical Shell ◽  
Supersonic Flow ◽  
Dynamic Instability ◽  
Numerical Study ◽  
Ritz Method ◽  
Functionally Graded ◽  
Reinforced Composite ◽  
Thin Walled ◽  
Functionally Graded Carbon Nanotubes

In this paper, dynamic instability of functionally graded carbon nanotubes (CNTs)-reinforced composite joined conical-cylindrical shell in supersonic flow is analyzed numerically. The higher-order shear deformation theory is applied to describe the stress–strain state of thin-walled structure. The assumed-mode method is used to derive the finite degrees-of-freedom dynamical system, which describes the structure motions. The structure motions are expanded by using the eigenmodes, which are obtained by the Rayleigh–Ritz method. The trial functions, which satisfy the continuity conditions at the cylindrical-cone junction, are used to obtain the eigenmodes. The properties of free vibrations of thin-walled structure are analyzed numerically. The dynamic instability of the joined conical-cylindrical shell in supersonic flow is analyzed using the characteristic exponents. As follows from the numerical study, the dynamic instability is arisen due to the Hopf bifurcation. The dependences of the supersonic flow critical pressure on the Mach number and the type of CNTs distribution are analyzed numerically.

Functionally graded carbon nanotubes/hydroxyapatite composite coating by laser cladding

2011 ◽  
Vol 205 (19) ◽  
pp. 4380-4387 ◽  
Author(s):  
Xibo Pei ◽  
Jian Wang ◽  
Qianbing Wan ◽  
Lijuan Kang ◽  
Minglu Xiao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Composite Coating ◽  
Laser Cladding ◽  
Functionally Graded ◽  
Hydroxyapatite Composite ◽  
Functionally Graded Carbon Nanotubes
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