A two-step optimization scheme based on equivalent stiffness parameters for forcing convexity of fiber winding angle in composite frames

In this paper, we examine the influence of swelling on the bulging bifurcation of inflated thin-walled cylinders under axial loading. We provide the bifurcation criteria for a membrane cylinder subjected to combined axial loading, internal pressure and swelling. We focus here on orthotropic materials with two preferred directions which are mechanically equivalent and are symmetrically disposed. Arterial wall tissue is modeled with this class of constitutive equation and the onset of bulging is considered to give aneurysm formation. It is shown that swelling may lead to compressive hoop stresses near the inner radius of the tube, which could have a potential benefit for preventing aneurysm formation. The effects of the axial stretch, the strength of the fiber reinforcement and the fiber winding angle on the onset of bifurcation are investigated. Finally, a boundary value problem is studied to show the robustness of the results.

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Integrated design optimization of composite frames and materials for maximum fundamental frequency with continuous fiber winding angles

Acta Mechanica Sinica ◽

10.1007/s10409-018-0784-x ◽

2018 ◽

Vol 34 (6) ◽

pp. 1084-1094 ◽

Cited By ~ 5

Author(s):

Zunyi Duan ◽

Jun Yan ◽

Ikjin Lee ◽

Jingyuan Wang ◽

Tao Yu

Keyword(s):

Design Optimization ◽

Fundamental Frequency ◽

Integrated Design ◽

Continuous Fiber ◽

Composite Frames ◽

Fiber Winding

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Fabrication of High-Quality Straight-Line Polymer Composite Frame with Different Radius Parts Using Fiber Winding Process

Polymers ◽

10.3390/polym13040497 ◽

2021 ◽

Vol 13 (4) ◽

pp. 497

Author(s):

Jaroslav Mlýnek ◽

Seyed Saeid Rahimian Koloor ◽

Tomáš Martinec ◽

Michal Petrů

Keyword(s):

Composite Structures ◽

Industrial Robot ◽

Superior Performance ◽

High Quality ◽

Guide Line ◽

Composite Frames ◽

Composite Frame ◽

Straight Line ◽

Fiber Winding ◽

Fiber Processing

The extraordinary features of fibrous composites enable advanced industries to design composite structures with superior performance compared to traditional structures. Composite frame structures have been designed frequently as components of mechanical systems to resist lateral and gravity loads. The manufacturing of high-quality composite frames depends primarily on the accurate fiber winding on frames with different pro-files and curved shapes. The optimal fiber winding process on a nonbearing composite frame with a circular cross-section is described in previous works by the same authors. As an extension to that, this study focuses on the manufacturing of straight-line composite frames with different profile radii at multiple locations. Such production procedure allows continuous winding of fibers gradually on individual parts of the frame and generally with different angles of fiber winding. The winding procedure is performed using fiber-processing head and industrial robot. The procedure for calculating the distance of the winding plane of fibers on the frame from the guide-line of the fiber-processing head is targeted. This distance depends on the required angle of fiber winding, the radius of the frame, and the geometric parameters of the fiber-processing head. The coordination of the speed of winding the fibers on the frame and the speed of the passage of the frame through the winding head is also considered. Determining the correct distance of winding the fibers from the corresponding guide-line of fiber-processing head and right coordination of the winding speed and the speed of passage of the frame through the fiber-processing head ensure compliance of the required angles of fiber windings on the frame and homogeneity of winding fibers, which are the two of the most important prerequisites for producing a quality composite frame. The derived theory is well verified on a practical experimental example.

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The Effects of Fiber Winding Angle At Carbon - Epoxy FW Pipes in Natural Gas Transmission Pipelines and Calculating the Optimum Winding Angle with Genetic Algorithm

Procedia Engineering ◽

10.1016/j.proeng.2015.12.174 ◽

2015 ◽

Vol 130 ◽

pp. 48-56

Author(s):

A.A.E. Satellou ◽

T. Hamzehpour

Keyword(s):

Genetic Algorithm ◽

Natural Gas ◽

Natural Gas Transmission ◽

Fiber Winding ◽

Winding Angle ◽

Transmission Pipelines

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Mechanical Properties Study of FRP Tube Steel Reinforced Concrete Structure Subjected to Axial Compression

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.482-484.1605 ◽

2012 ◽

Vol 482-484 ◽

pp. 1605-1610

Author(s):

Le Zhou ◽

Kai Li ◽

Ji Hong Jiang

Keyword(s):

Reinforced Concrete ◽

Concrete Structure ◽

Tube Wall ◽

Tube Steel ◽

Reinforced Concrete Structure ◽

Steel Reinforced Concrete ◽

Tube Wall Thickness ◽

Frp Tube ◽

Fiber Winding ◽

Winding Angle

In order to facilitate the actual design of the project, we study force performance of FRP tube steel-reinforced concrete columns under axial load. By five FRP tube steel reinforced concrete structures of axial compression, explore the damage characteristics and the force characteristics of the combination of column, and study parameters on performance of the force combination of column such as FRP tube wall thickness, fiber winding angle and loading mode etc. The capacity of combination column increases with the larger of the FRP tube wall thickness; and increases with the smaller of the FRP fiber winding angle; loaded in different ways lead to different capacities. Using superposition method Study and deduce a more reasonable axial compressive bearing capacity formula of FRP tube steel reinforced concrete structure. Theoretical calculation results match well with experimental results.

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