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.

Enhancement of vibration characteristics in filament wound FRP composite shafts using nitinol wires

2018 ◽  
Vol 47 (5) ◽  
pp. 377-385 ◽  
Author(s):  
Kannan Murugesan ◽  
Kalaichelvan K. ◽  
M.P. Jenarthanan ◽  
Sornakumar T.
Keyword(s):  
Natural Frequency ◽  
Damping Ratio ◽  
Filament Winding ◽  
Fiber Reinforced ◽  
Content Type ◽  
Fiber Reinforced Plastic ◽  
Damping Characteristics ◽  
Filament Wound ◽  
Reinforced Plastic ◽  
Hollow Shafts

Purpose The purpose of this paper is to investigate the use of embedded Shape Memory Alloy (SMA) nitinol wire for the enhancement of vibration and damping characteristics of filament-wound fiber-reinforced plastic composite hollow shafts. Design/methodology/approach The plain Glass Fiber-Reinforced Plastic (GFRP) and plain Carbon Fiber-Reinforced Plastic (CFRP) hollow shafts were manufactured by filament winding technique. Experimental modal analysis was conducted for plain hollow shafts of C1045 steel, GFRP and CFRP by subjecting them to flexural vibrations as per ASTM standard C747, with both ends clamped (C-C) end condition to investigate their vibration and damping behavior in terms of first natural frequency, damping time and damping ratio. Nitinol wires pre-stressed at various pre-strains (2, 4 and 6 per cent) were embedded with CFRP hollow shafts following same manufacturing technique, and similar experimental modal analysis was carried out by activating nitinol wires. The first natural frequencies of all the shaft materials were also predicted theoretically and compared with experimental measurements. Findings Among the three materials C1045 steel, plain GFRP and plain CFRP, the vibration and damping behavior were found to be the best for plain CFRP. Hence, CFRP shafts were considered for further improvement by embedding nitinol wires at pre-stressed condition. For CFRP shafts embedded with nitinol wires, the damping time decreased; and damping ratio and first natural frequency increased with increase in percentage of pre-strain. In comparison with plain CFRP, 7 per cent increase in first natural frequency and 100 per cent increase in damping ratio were observed for nitinol embedded CFRP shafts with 6 per cent pre-strain. Theoretical predictions of the first natural frequencies agree well with the experimental results for all the shaft materials. Originality/value The effect of nitinol on vibration and damping characteristics of filament wound hollow CFRP composite shafts with different pre-strains has not been studied extensively by the previous researchers. This paper addresses the effect of embedded nitinol wires pre-stressed at three varied pre-strains, that is, 2, 4 and 6 per cent on the vibration and damping characteristics of composite hollow CFRP shafts manufactured by filament winding technique.

INFLUENCE OF UV RADIATION ON PHYSICAL-MECHANICAL CHARACTERISTICS OF FILAMENT-WOUND EPOXY GFRP BASED ON EPOXY MATRICES

2021 ◽  
pp. 2-6
Keyword(s):  
Epoxy Matrix ◽  
Mechanical Characteristics ◽  
Oxidative Degradation ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Filament Wound ◽  
Reinforced Plastic ◽  
Epoxy Matrices ◽  
Properties Of Composites

The effect of ultraviolet radiation on the physical-mechanical characteristics of filament-wound glass-fiber reinforced plastic (GFRP) based on an epoxy matrix has been studied. During 45 days, a decrease in strength of GFRP when stretching and bending takes place. However, the compressive strength increases. IR spectroscopy has shown that the change in the properties of composites occurs as a result of photo-oxidative degradation of the epoxy matrix.

scholarly journals FEM Analysis of Dynamic Response of Buried Fiber Reinforced Plastic Matrix Pipe under Seismic Load

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Xu Lei ◽  
Ye Zhicai ◽  
Ren Qingwen ◽  
Zhang Lei
Keyword(s):  
Dynamic Response ◽  
Seismic Analysis ◽  
Dynamic Interaction ◽  
Seismic Load ◽  
Fiber Reinforced ◽  
Laminated Structure ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Plastic Matrix ◽  
Surrounding Soil

Fiber reinforced plastic matrix pipes have been widely used in the field of civil engineering and hydraulic engineering. In general, the existing FEM models used in the seismic analysis of buried pipes do not fully consider the dynamic interaction between pipe and surrounding soil, and most of the models are proposed for homogeneous pipe. Therefore, the existing models cannot be directly applied to the seismic analysis of fiber reinforced plastic matrix pipes with laminated structure. Based on the aforementioned, the FEM model for the seismic analysis of fiber reinforced plastic matrix pipes is presented by taking consideration of the laminated structure, the complicated dynamic interaction between pipe and surrounding soil, and the propagation of seismic scattering waves from finite field to infinite field. The analysis results of a project case show that the proposed model can reasonably analyse the dynamic response of buried fiber reinforced plastic matrix pipes under seismic load.

External Nozzle Load Evaluation for Filament Wound FRP Cylindrical Vessels

2014 ◽  
Author(s):  
Dale W. DeCola ◽  
Jeffrey D. Eisenman
Keyword(s):  
Material Properties ◽  
Pressure Vessels ◽  
Evaluation Procedure ◽  
Storage Tanks ◽  
Element Analysis ◽  
Fiber Reinforced Plastic ◽  
Frp Composite ◽  
Filament Wound ◽  
Reinforced Plastic ◽  
Load Evaluation

The evaluation of external nozzle loading on filament wound Fiber Reinforced Plastic (FRP) storage tanks and pressure vessels can be a challenging task. While established methods for metallic vessels exist, limited guidance is available to account for the unique characteristics of FRP composite materials and standard FRP fabrication practices. Anisotropic material properties can have a significant effect on the stress/strain distribution due to external nozzle loading. Typical FRP nozzle installation practices introduce additional concerns, including the potential for peeling or overstraining the nozzle attachment overlays. In this paper, the effects of various orthotropic material properties of cylindrical vessels with external nozzle loading are explored using finite element analysis and compared with existing methods established for isotropic materials. Modifications to account for the effects of filament wound FRP material properties are proposed. A simplified FRP nozzle load evaluation procedure, along with additional commentary, is presented to address some of the special considerations regarding nozzle load evaluation for FRP storage tanks and pressure vessels.

Simplified Analyses of a Fiber-Reinforced Plastic Joint for Filament-Wound Pipes

1999 ◽  
Vol 121 (3) ◽  
pp. 327-333 ◽  
Author(s):  
H. Estrada ◽  
I. D. Parsons
Keyword(s):  
Finite Element Analysis ◽  
Analysis Procedure ◽  
Joint Analysis ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Fiber Reinforced Plastic ◽  
Filament Wound ◽  
Reinforced Plastic ◽  
Material Discontinuities ◽  
Simplified Analysis

A simplified analysis procedure is described for a fiber-reinforced plastic (FRP) stubflanged joint which addresses some of the problems with current FRP joints. The joint consists of a tapered hub that is filament-wound with the pipe. A separate stub is used to connect the two halves of the joint. This system avoids material discontinuities at the flange-pipe intersection and pull-back of the flange. The joint is modeled following the Taylor Forge approach used in metallic joint analysis. The analytical model is verified using finite element analysis; the results are in excellent agreement.

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