Stability of cylindrical shells reinforced by ribs of variable stiffness

1988 ◽  
Vol 24 (10) ◽  
pp. 985-989 ◽  
Author(s):  
V. V. Gusev ◽  
V. V. Kostyrko ◽  
V. L. Krasovskii ◽  
V. I. Latukha
Keyword(s):  
Cylindrical Shells ◽  
Variable Stiffness

Linear modes of vibration of cylindrical shells in composite laminates reinforced by curvilinear fibres

2016 ◽  
Vol 22 (20) ◽  
pp. 4141-4158 ◽  
Author(s):  
Pedro Ribeiro
Keyword(s):  
Composite Laminates ◽  
Cylindrical Shells ◽  
Variable Stiffness ◽  
Mode Shapes ◽  
Natural Mode ◽  
Published Data ◽  
Modes Of Vibration ◽  
Parametric Studies ◽  
Element Type ◽  
Variable Stiffness Composite Laminates

Modes of vibration of thin cylindrical shells made up of layers with curvilinear fibres (variable stiffness composite laminates (VSCL) shells) are investigated in the linear regime. A p-version finite element type formulation is developed for that purpose; in the absence of data on vibrations of cylindrical VSCL shells, the formulation is verified by comparisons with published data on laminated shells reinforced by straight fibres and on VSCL plates. Parametric studies are performed, in order to investigate how curvilinear fibre paths can influence the modes of vibration. It is found that curvilinear fibre paths can have a very large effect, larger than on plates, on the natural frequencies and natural mode shapes of vibration of cylindrical shells. Factors that strongly influence the modes of vibration of VSCL shells are found; these include the fibre orientation at boundaries and in relation to principal normal sections.

Buckling Analysis of Variable Stiffness Composite Cylindrical Shells Based on Hermite Curves

2019 ◽  
Vol 805 ◽  
pp. 191-197
Author(s):  
Chun Bo Nian ◽  
Xiao Ping Wang ◽  
Jing Yu Pei
Keyword(s):  
Cylindrical Shell ◽  
Cylindrical Shells ◽  
Initial Point ◽  
Variable Stiffness ◽  
Tangential Direction ◽  
Buckling Analysis ◽  
Buckling Load ◽  
Practical Significance ◽  
Composite Cylindrical Shell ◽  
End Point

Based on the Hermite curve, the buckling behavior of a variable stiffness composite cylindrical shell is investigated. Firstly, the cylindrical shell is unfolded into a plane, and the Hermite curve is taken as the basic reference path on the plane and the variation of the fiber orientation is obtained. Then, the finite element analysis pre-processing program of the variable stiffness composite cylindrical shell is written by Python to develop ABAQUS interactive interface. Finally, the GUI plug-in is developed successfully, the buckling analysis of the constant stiffness and variable stiffness cylindrical shells is carried out and the effect of buckling load on the initial tangential direction q1, the initial point tangential magnitude L1, the end point tangential direction q2, the end point tangential magnitude L2 is preliminarily explored. It is found that the buckling load of the variable stiffness cylindrical shell is improved greatly. The secondary development of ABAQUS by Python is used to realize the automatic modeling and calculation analysis of the variable stiffness cylindrical shell parts, which provides research ideas and processes for practical engineering research, and has certain practical significance.

Design of Variable Stiffness Cylinder with Holes Under Bending for Maximum Buckling Load Using Lamination Parameters

2019 ◽  
Author(s):  
Mazen Albazzan ◽  
Brian Tatting ◽  
Ramy Harik ◽  
Zafer Gürdal ◽  
Adriana Blom-Schieber ◽  
...  
Keyword(s):  
Variable Stiffness ◽  
Buckling Load ◽  
Lamination Parameters
Sign in / Sign up

Export Citation Format

Share Document