Designing of High-Speed Machine Shafts of Carbon Composites with Highly Nonlinear Characteristics

Abstract:

Carbon composites (carbon-aramide) constitute modern “Hi-Tech” materials of an extremely favourable ratio of load to mass transfer. Thereby the idea of using them for long transmission shafts seems to be very attractive, specially in aviation and sailing. Unfortunately structures made of carbon-aramide composites are characterised by a strong anisotropy and in effect by non-linearity of elastic characteristics, due to which they have significantly different dynamic influences than steel structures. To this end there is a need of application of different calculation algorithms than the ones widely used in Construction Engineering. It requires taking into account the coupling between transverse and torsional vibrations, which essentially projects onto the possibility of the critical states occurrence. This is indispensable since shafts made of expensive composite materials are profitable in places where their low elementary mass is essential (long high-speed transmission systems). The paper presents the theoretical discussion of this problem, empirical investigations of nonlinear characteristics as well as the proposition of designing methods.

• Periodical: Key Engineering Materials (Volume 490)
• Pages: 76-82
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.490.76
• Online since: September 2011
• Authors: Zbigniew Dąbrowski, Piotr Deuszkiewicz
• Keywords: Carbon/Epoxy Composite, Non-Linear Vibration, Rotating System Dynamics

References

[1] Batko W., Dabrowski Z., Engel Z., Kicinski J., Weyna S.: Modern Methods of Vibroacoustic Diagnostic – part I (in polish), Institute for Sustainable Technologies – National Research Institute, Warsaw – Radom, 2005.

[2] Dabrowski Z.: Machine Shafts (in polish), Polish Scientific Publishers PWN, Warsaw, 1999.

[3] Dabrowski Z., Dziurdz J., Skorski W.W.: Vibration of Carbon Fibre Composites Masts, (in polish), Institute for Sustainable Technologies – National Research Institute, Warsaw – Radom, 2007.

[4] Deuszkiewicz P.: Diagnostic Ability Research on Composite Shafts (in polish), XXXIV Polish Symposium on Machine Diagnostic, 2007.

[5] Kurnik W. (red.), Tylikowski A., Starczewski Z., Przybylowicz P.: Nonconventional Materials in Diagnostic and Active Vibration Reduction – DIADYN series (in polish), Institute for Sustainable Technologies – National Research Institute, Warsaw – Radom, 2008.

[6] Pakowski R., Deuszkiewicz P.: Dynamic Research on Nontypical Powertrain Systems (in polish), XXX Symposium on Marine Power Plants – SymSO, Gdynia, 2009.

[7] Kurnik W. (red.), Tylikowski A.: Mechanics of laminating elements (in polish), Warsaw University of Technology Publishers, Warsaw, 1997.