&lt;title&gt;Performance of Nitinol-reinforced drive shafts&lt;/title&gt;

Baz, A.; Chen, Tung-Huei

doi:10.1117/12.152810

Cited by 14 publications

(8 citation statements)

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“…This stiffness modification occurs as a result of thermally induced martensite phase transformation of SMA actuators embedded in composite structures. Several studies have been done on [9][10][11][12][13][14][15] combining the advantages of both the composite material and the SMA to build smart composite shafts. Baz and Chen [9] have proposed a smart shaft, which can actively stiffen in response to increased rotational speed or increased amplitudes of vibration.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Dynamical Behavior of Rotating Composite Shafts with SMA Wires

Ren

Dai

et al. 2014

Shock and Vibration

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A dynamical model is developed for the rotating composite shaft with shape-memory alloy (SMA) wires embedded in. The rotating shaft is represented as a thin-walled composite of circular cross-section with SMA wires embedded parallel to shaft’s longitudinal axis. A thermomechanical constitutive equation of SMA proposed by Brinson is employed and the recovery stress of the constrained SMA wires is derived. The equations of motion are derived based on the variational-asymptotical method (VAM) and Hamilton’s principle. The partial differential equations of motion are reduced to the ordinary differential equations of motion by using the Galerkin method. The model incorporates the transverse shear, rotary inertia, and anisotropy of composite material. Numerical results of natural frequencies and critical speeds are obtained. It is shown that the natural frequencies of the nonrotating shaft and the critical rotating speed increase as SMA wire fraction and initial strain increase and the increase in natural frequencies becomes more significant as SMA wire fraction increases. The initial strain of SMA wires appears to have marginal effect on dynamical behaviors of the shaft. The actuation performance of SMA wires is found to be closely related to the ply-angle.

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Section: Introductionmentioning

confidence: 99%

Modeling and Dynamical Behavior of Rotating Composite Shafts with SMA Wires

Ren

Dai

et al. 2014

Shock and Vibration

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“…Some studies have been done to build smart composite shafts by combining the advantages of both the composite material and the SMA. Baz and Chen [10] analyzed a composite rotor embedded with Nitinol wires by theoretical and experimental means. eir results showed that activating Nitinol wires results in a reduction of about 50% in vibration amplitudes.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of a Tapered Composite Thin-Walled Rotating Shaft Embedded with SMA Wires Using the Generalized Differential Quadrature Method

Zhong

Gao

Ren

et al. 2020

Shock and Vibration

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A dynamical model is developed for the tapered composite thin-walled rotating shaft with shape memory alloy (SMA) wires embedded in. The SMA wires are embedded at an interlayer of the shaft and arranged along the conical surface of the tapered composite shaft. Recovery stresses generated during the phase transformation are calculated based on one-dimensional Brinson’s model. The governing equations are obtained based on a refined variational asymptotic method (VAM) and Hamilton’s principle. The partial differential equations of motion are reduced to the ordinary differential governing equations by using the generalized differential quadrature method (GDQM). Numerical results of natural frequencies and critical speeds are obtained. The effects of the fraction of SMA wires, the initial strain of SMA wires, temperature, ply angle, taper ratio, boundary conditions, and rotating speed on the frequency characteristics are investigated.

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“…Literature on experimental study suggests that Ni-Ti alloy wires may be embedded into fiber-reinforced composite structures to control static deformation, vibration, buckling and acoustic radiation (Rogers, 1990). Nitinol wire-embedded composite rotor results in a reduction of about 50 per cent in vibration amplitudes by activating nitinol wires (Baz and Chen, 1993). Studies have been conducted by activating the SMA wires using electrical resistive heating on graphite-epoxy composite beams clamped at both ends.…”

Section: Introductionmentioning

confidence: 99%

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

Kannan¹,

Kalaichelvan

Jenarthanan

et al. 2018

PRT

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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.

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<title>Performance of Nitinol-reinforced drive shafts</title>

Cited by 14 publications

References 0 publications

Modeling and Dynamical Behavior of Rotating Composite Shafts with SMA Wires

Modeling and Dynamical Behavior of Rotating Composite Shafts with SMA Wires

Dynamic Analysis of a Tapered Composite Thin-Walled Rotating Shaft Embedded with SMA Wires Using the Generalized Differential Quadrature Method

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

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