Semiactive Control of a Shape Memory Alloy Hybrid Composite Shaft under a Torsional Load

• Autorzy: Tylikowski A.
• Konferencja: Polish-German Workshop on Dynamical Problems of Mechanical Systems (10 ; 3-7.09.2007 ; Goslar, Germany)
• Języki publikacji: EN

Abstrakty

EN

The dynamic stability analysis is applied to activated shape memory alloy hybrid structures rotating with the nonconstant angular velocity. The rotating circular cylindrical shell is treated as a beam-like structure subjected to a constant torque. The time-dependent component of angular velocity is assumed in the form of the wide-band Gaussian processes modelled as a Wiener process. In this dynamics study the hybrid elements is treated as a thin angle-ply laminated beam containing both the conventional fibers arbitrary oriented and the activated shape memory alloy fibers parallel to the shaft axis. Using the appropriate energy-like Liapunov functional and the standard stability technique of partial differential equations leads to the effective sufficient criterion for the dynamic stability and the uniform stochastic stability of the shaft equilibrium. The boundaries of stability regions as functions of angular velocity, loading characteristics, damping coefficients, and properties of shaft material are analytically defined. The thermal activation substantially increases stability regions.

Słowa kluczowe

EN

rotating shaft; SMA fibers; torsional load; time-dependent velocity; Liapunov method

PL

włókna SMA; wał obrotowy; zmienna prędkość; metoda Liapunowa

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Problems
• Rocznik: 2007
• Tom: Vol. 31, No. 2
• Strony: 128--139
• Opis fizyczny: Bibliogr. 8 poz., tab., wykr.

Twórcy

autor

Tylikowski A.

• Warsaw University of Technology, Institute of Machine Design Fundamentals,

Bibliografia

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• Lee, H.J., Lee, J.J., Huh, J.S., 1999, A simulation study on the thermal buckling behaviour of laminated composite shells with embedded shape memory alloy (SMA) wires, Composite Structures, 47,463-469.
• Rogers, C.A., 1990, Active vibration and structural acoustic control of shape memory alloy hybrid composites, Experimental results, J. Acoust. Soc. Amer., 86, 2803-2811.
• Song, O., Librescu, L., 1997, Anisotropy and structural coupling on vibration and instability of spinning thin-walled beams, J. Sound Vibration, 204(3), 477-494.
• Tylikowski, A., 1998, Dynamic stability of rotating composite shells with thermoactive shape memory alloy fibers, J. Thermal Stresses, 21, 327-339.
• Tylikowski, A., 1998, Dynamic stability of a rotating shaft with a nonconstant rotation speed, D. Besdo, R. Bogacz, (eds.), Dynamics of Continua, Shaker Verlag, Aachen, 356-365.
• Walker, J.A., 1973, Stability of a pin-ended bar in torsion and compression, ASME J. Appl. Mech., 94, 405-410.