Fundamental frequency of a cantilever composite filament-wound anisogrid lattice cylindrical shell

2015 ◽  
Vol 133 ◽  
pp. 564-575 ◽  
Author(s):  
A.V. Lopatin ◽  
E.V. Morozov ◽  
A.V. Shatov
Keyword(s):  
Cylindrical Shell ◽  
Fundamental Frequency ◽  
Filament Wound ◽  
Composite Filament

Composite Filament Winding

2011 ◽  
Keyword(s):  
Best Practices ◽  
Stress Ratio ◽  
Production Quality ◽  
Test Methods ◽  
Filament Winding ◽  
Curved Surfaces ◽  
Filament Wound ◽  
Vector Calculus ◽  
Laminate Thickness ◽  
Composite Filament

Composite Filament Winding describes the engineering involved in the design and construction of filament-wound products and the processes and equipment by which they are made. It covers everything from the geometry, physics, and math of winding theory to best practices for handling fibers and resins. It explains how constituent materials and winding patterns influence production quality and costs, how to estimate variables such as laminate thickness and roving dimensions, and how to express fiber trajectories on curved surfaces using vector calculus and intuitive observations. It discusses the design and operation of filament winding systems, the origin of various processes, and test methods and procedures. It presents examples demonstrating accepted design practices and the consideration of factors such as stiffness, discontinuities, stress ratio, mandrel geometry, and process control. It also includes a glossary of related terms. For information on the print version, ISBN 978-1-61503-722-3, follow this link.

Three-Dimensional Effective Elastic Moduli for Multi-Directional Hybrid Filament-Wound Cylindrical Shell with Lining

2011 ◽  
Vol 121-126 ◽  
pp. 539-544
Author(s):  
Wen Jun Ruan ◽  
Qing Ping Yang ◽  
Guang Lei Xu ◽  
Hao Wang
Keyword(s):  
Cylindrical Shell ◽  
Elastic Moduli ◽  
Plate Theory ◽  
Three Dimensional ◽  
Effective Elastic Moduli ◽  
Hybrid Fiber ◽  
Filament Wound ◽  
Glass Carbon ◽  
Filament Wound Composite ◽  
Wound Composite

A method based on laminated plate theory is presented for estimating three-dimensional effective elastic moduli of multi-directional hybrid filament-wound composite cylindrical shell with lining. The method introduces a factor of hybrid effects. The effective elastic moduli of glass/epoxy fiber-wound tube with lining and glass/carbon/epoxy hybrid fiber-wound tube with lining are predicted by present method respectively. It is shown that the method is simple and accurate.

On Elastic Oscillations of a Thick-Walled Cylindrical Shell Subjected to Initial Finite Twist

1975 ◽  
Vol 42 (3) ◽  
pp. 712-715 ◽  
Author(s):  
A. Ertepinar ◽  
A. S. D. Wang
Keyword(s):  
Cylindrical Shell ◽  
Fundamental Frequency ◽  
Finite Elasticity ◽  
Numerical Results ◽  
Natural Vibrations ◽  
Elastic Deformations ◽  
Extended Theory ◽  
Rigorous Theory ◽  
Torsional Instability ◽  
Prestressed State

This paper is concerned with the natural vibrations of a rubber-like, thick-walled tube which is prestressed by an initial finite twist about the axis of the tube. The analysis is based on a rigorous theory of finite elasticity and the extended theory of small displacements superposed on large elastic deformations. Numerical results are obtained for tubes made of a neo-Hookean material. The fundamental frequency of the vibrations is found to depend on the prestressed state of the tube. In particular, when the tube becomes unstable under the initial twist, then the corresponding fundamental frequency ceases to be real-valued. When this happens, the problem becomes identical with that of torsional instability of similar tubes which was investigated earlier both analytically and experimentally.

scholarly journals Exploring Strain Characteristics and Bearing Capacity of a Carbon Filament-Wound Composite Cylindrical Shell under Hydrostatic Pressure

2020 ◽  
Vol 38 (5) ◽  
pp. 937-943
Author(s):  
Kechun Shen ◽  
Guang Pan ◽  
Yao Shi ◽  
Zhun Li ◽  
Ranfeng Wei
Keyword(s):  
Cylindrical Shell ◽  
Hydrostatic Pressure ◽  
Bearing Capacity ◽  
Failure Mode ◽  
Strain Amplitude ◽  
Circumferential Strain ◽  
Composite Cylindrical Shell ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
Wound Composite

In order to study the strain characteristics and bearing capacity of a filament-wound composite cylindrical shell and its different dome structures under hydrostatic pressure, experiments were carried out. Firstly, static tests were conducted to study the axial and circumferential strain of the composite cylindrical shell on its different positions. The bearing capacity of the ellipsoid dome was compared with that of the hemisphere dome. The blasting test and the nonlinear analysis of the strain were conducted. The relationship between the strain trend and the crack propagation path was studied, and the structural failure mode was explored. The study shows that as the hydrostatic pressure increases, the strain increases and that the strain amplitudes of measuring points gradually appear different and show varying degrees of nonlinearity. Along the circumferential direction of the circumferential crack, the axial strain amplitude gradually decreases by 20%. But the circumferential strain amplitude gradually increases by 94%. As the load of the composite cylindrical shell increases to a certain extent, its final failure mode is strength failure, but its instability is not obvious.

Design and Fabrication of the World’s First Filament–Wound Section X Class II Vessels

2011 ◽  
Author(s):  
Juan Du ◽  
Paul DiCarlo ◽  
Jess Richter ◽  
Clair Guess
Keyword(s):  
Cylindrical Shell ◽  
Seismic Analysis ◽  
Class Ii ◽  
Filament Winding ◽  
Fiber Reinforced Plastic ◽  
Filament Wound ◽  
Reinforced Plastic ◽  
Design Pressure ◽  
Fabrication Time ◽  
Structural Layer

The world’s first filament-wound ASME Section X [1] Class II FRP(fiber reinforced plastic) vessels were built by Tankinetics Inc. in 2010. These vessels had semi-elliptical top and bottom, and were supported on skirts as shown in Fig.1. This paper is focused on the novelty of these vessels from design and fabrication standpoints. The design pressure is 50.76 psig. Ashland Derakane™ 470 resin is selected for the corrosion liner, and Derakane™ 510 N resin is used in the structural layer. The design is based on ASME Section X code [1] method A. For wind and seismic analysis, IBC 2006[3] and NBCC 2005[4] codes are followed. The domed top and bottom were made by hand lay-up method while the cylindrical shell section and skirt were made by filament winding technology. Filament winding is chosen for these pioneer vessels because it can produce stiffer, higher-strength laminates with much less fabrication time as compared to traditional hand lay-up process.

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