Non-Geodesic Trajectories for Filament Wound Composite Truncated Conical Domes

2013 ◽  
Vol 281 ◽  
pp. 304-307 ◽  
Author(s):  
Lei Zu ◽  
Qin Xiang He ◽  
Jun Ping Shi ◽  
Hui Li
Keyword(s):  
Differential Geometry ◽  
Present Method ◽  
Pressure Vessels ◽  
Angle Distribution ◽  
Conical Shells ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
The Given ◽  
Winding Angle ◽  
Wound Composite

The goal of this paper is to present non-geodesic trajectories for filament wound truncated conical domes for pressure vessels. The fiber trajectories for non-geodesically overwound truncated conical shells are obtained based on differential geometry and the non-geodesic winding law. The influence of the slippage coefficient on non-geodesic trajectories is evaluated in terms of the winding angle distributions. The non-geodesic trajectories corresponding to various initial winding angles are also illustrated for the given slippage coefficient. The results show that the winding angle distribution of non-geodesics on a truncated conical dome has an overall increase with the increase of the slippage coefficient or the initial winding angle. The present method can provide a significant reference for developing non-geodesically overwound conical structures.

Semi-Geodesics-Based Dome Design for Filament Wound Composite Pressure Vessels

2013 ◽  
Vol 275-277 ◽  
pp. 1601-1604 ◽  
Author(s):  
Lei Zu ◽  
Qin Xiang He ◽  
Jun Ping Shi
Keyword(s):  
Present Method ◽  
Design Space ◽  
Pressure Vessels ◽  
Governing Equations ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
The Creation ◽  
Winding Angle ◽  
Wound Composite

In this paper we apply semi-geodesic trajectories to the creation of isotensoid domes for filament wound pressure vessels. The governing equations for the determination of the meridian shapes and related winding angle distributions of domes are derived using the netting analysis and the semi-geodesic winding law. The effects of the slippage coefficient on the geometry and fiber trajectories of the domes are respectively evaluated in terms of the resulting meridional curves and fiber angles. It is revealed that the semi-geodesic angles and the dome depth have an overall decrease with increasing the slippage coefficient. The results also demonstrate that the use of semi-geodesics significantly enlarge the design space for the geometry and adapted fiber trajectories of the domes. The present method can provide a significant reference for the design and production of the domes for semi-geodesically overwound pressure vessels.

Dome shape optimization of filament-wound composite pressure vessels based on hyperelliptic functions considering both geodesic and non-geodesic winding patterns

2016 ◽  
Vol 51 (14) ◽  
pp. 1961-1969 ◽  
Author(s):  
Ji Zhou ◽  
Jianqiao Chen ◽  
Yaochen Zheng ◽  
Zhu Wang ◽  
Qunli An
Keyword(s):  
Optimum Design ◽  
Basis Function ◽  
Pressure Vessel ◽  
Pressure Vessels ◽  
Filament Wound ◽  
Composite Pressure Vessel ◽  
Filament Wound Composite ◽  
Winding Angle ◽  
Dome Shape ◽  
Wound Composite

Filament-wound composite pressure vessels, owing to the advantages of their high specific strength, specific modulus and fatigue resistance, as well as excellent design performance, have been widely used in energy engineering, chemical industry and other fields. A filament-wound composite pressure vessel generally consists of two parts, a cylindrical drum part and the dome parts. In the cylindrical drum part, the filament winding angle and the winding layer thickness can be easily determined due to the regular shape. In the dome parts, however, both the winding angle and the thickness vary along the meridian line. Performance of the dome parts, which strongly depends on the effect of end-opening and the winding mode, dominates the performance of a pressure vessel. In this paper, optimum design of the dome parts is studied by considering both geodesic winding and non-geodesic winding patterns. A hyperelliptic function is adopted as the basis function for describing the meridian of the dome shape. The dome contour is optimized by taking the shape factor (S.F.) as the objective and parameters in the basis function as the design variables. A specific composite pressure vessel is taken as the numerical analysis example with varying dome shape which is to be optimized. The optimum design solution is obtained through the particle swarm optimization algorithm. It shows that an optimized dome with non-geodesic winding has better S.F. as compared with geodesic winding. Influences of the slippage coefficient and the polar opening on the S.F. are also discussed.

Research on Homogenization of Composite Materials

2013 ◽  
Vol 663 ◽  
pp. 426-430
Author(s):  
Zhen Yu Zhou ◽  
Qi Wen Xue
Keyword(s):  
Neural Network ◽  
Composite Materials ◽  
Bp Neural Network ◽  
Pressure Vessels ◽  
Equivalent Material ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
Output Information ◽  
Wound Composite ◽  
Composite Pressure Vessels

A numerical model is given to identify equivalent parameters of composite materials, using BP neural network algorithm. Taking Filament-wound composite pressure vessels as the research object, finite element models are first constructed .Getting node displacements as network training samples, the mechanical parameters as output information of network for effective training, the equivalent material parameters can be obtained. The satisfactory numerical validation is given and results show that the proposed method can identify the equivalent modulus and the equivalent Poisson’s ratio of the Filament-wound composite pressure vessels with precision. The computational efficiency is improved with BP neural network.

Study on Winding Pattern and Undulation Degree of Filament-Wound Composite Tube

2011 ◽  
Vol 341-342 ◽  
pp. 281-285
Author(s):  
Jiang Sun ◽  
Qi Xiao
Keyword(s):  
Filament Winding ◽  
Composite Tube ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
Winding Angle ◽  
Wound Composite

The filament winding pattern of composite tube, the winding parameters and the undulation degree are studied in this paper. The study shows that the winding pattern mainly depends on Sp , the number of angular sections between the last circuit and the next circuit and Nc, the number of circuits performed until the fiber tow is deposited just next to the first circuit, and the changes of Nc and winding angle all have effects on the undulation degree.

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