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.

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.

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.

Development of glass fiber reinforced plastic poles for transmission and distribution lines

2000 ◽  
Vol 27 (5) ◽  
pp. 850-858 ◽  
Author(s):  
Sherif Ibrahim ◽  
Dimos Polyzois ◽  
Sherif K Hassan
Keyword(s):  
Theoretical Model ◽  
Glass Fiber ◽  
Filament Winding ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic ◽  
Cantilever Bending ◽  
Transmission And Distribution

An extensive research project is currently being carried out at The University of Manitoba, Canada, to develop lightweight glass fiber reinforced plastic (GFRP) poles for use in transmission and distribution networks. In this paper, results from tests involving full-scale tapered GFRP poles with a hollow circular cross section subjected to cantilever bending are presented. The filament winding process was employed to produce the poles using polyester resin reinforced with E-glass fibers. Cantilever bending tests were conducted on twelve full-scale poles up to failure. Test parameters included fiber orientation and number of layers. Extensive theoretical work preceded the test program and a theoretical model was developed for evaluating the failure load. The results to date indicate that the developed theoretical model can predict quite well the ultimate capacity and behavior performance of GFRP poles. This theoretical model was used in this investigation to determine the optimum cross-sectional dimensions for 6.1 m (20 ft) and 18.3 m (60 ft) Class 1 GFRP poles.Key words: transmission and distribution poles, filament winding, fiber-reinforced plastics.

Free-Vibration Analysis of Clamped Antisymmetrically Laminated Elliptical Plates

1998 ◽  
Vol 65 (2) ◽  
pp. 341-345 ◽  
Author(s):  
K. Hosokawa ◽  
Y. Yamada ◽  
T. Sakata
Keyword(s):  
Free Vibration ◽  
Natural Frequency ◽  
Mode Shape ◽  
Orientation Angle ◽  
Free Vibration Analysis ◽  
Mode Shapes ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Plastic Composite ◽  
Reinforced Plastic

In a previous paper, a numerical approach for analyzing the free vibration problem of an unsymmetrically laminated fiber-reinforced plastic composite plate was proposed by the authors. In the present paper, this approach is applied to the clamped antisymmetrically laminated elliptical plate. As numerical examples, the natural frequencies and the mode shapes of the circular and elliptical plates are estimated. The effects of the fiber orientation angle on natural frequency and mode shape are studied. Furthermore, the vibration tests of the clamped antisymmetrically laminated circular and elliptical plates made of carbon fiber-reinforced plastic are carried out, and the experimental natural frequency and mode shape are compared with the numerical results.

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