Extension-twist coupled tiltrotor blades using Flexible Matrix Composites

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

Volumn 7, Issue , 2005, Pages 4775-4793

  Nampy, Sreenivas N ^a   Smith, Edward C ^a,b  

^a PENNSYLVANIA STATE UNIVERSITY   (United States)

^b Department of Aerospace Engineering ^*

Author keywords

[No Author keywords available]

Indexed keywords

BLADE SPAR DESIGNS; CARBON EPOXY MATERIALS; FLEXIBLE MATRIX COMPOSITES (FMC); TILTROTORS;

AIRCRAFT; CARBON; COMPOSITE MATERIALS; ELASTICITY; FLIGHT DYNAMICS; MATHEMATICAL MODELS; ROTORS; STRAIN;

TURBOMACHINE BLADES;

EID: 28844487950     PISSN: 02734508     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (25)

1. Hong, C. H., and Chopra, I., "Aeroelastic Stability Analysis of a Composite Rotor Blade," Journal of the American Helicopter Society, Vol. 30, No. 2, 1985, pp. 57-67.
2. Panda, B., and Chopra, I., "Dynamics of Composite Rotor Blades in Forward Flight," Vertica, Vol. 11, (1/2), Jan 1987.
3. Bauchau, O. A., Loewy, R. G., and Bryan, P.S., "An Approach to Ideal Twist Distribution in Tilt Rotor VSTOL Blade Designs," AHS 39th Annual Proceedings, May 1983.
4. Kosmatka, J. B., "Extension-Bend-Twist Coupling Behavior of Nonhomogeneous Anisotropic Beams with Initial Twist," Proceedings of the 32nd Structures, Structural Dynamics and Materials Conference, Baltimore, MD, April 8-10, 1991.
5. Kosmatka, J. B., and Lake, R. C., "Extension-Twist Behavior of Initially Twisted Composite Spars for Tilt-Rotor Applications," Proceedings of the 37th Structures, Structural Dynamics and Materials Conference, Salt Lake City, Utah, Vol. 4, 1996, pp. 2175-2184.
6. Nixon, M.W., "Extension-Twist Coupling of Composite Circular Tubes with Application to Tiltrotor Blade Design," Proceedings of the 28th Structures, Structural Dynamics and Material conference, Monterey, California, April 1987.
7. Lake, R. C., Nixon, M. W., Wilbur, J. D., Singleton., and Mirick, P. H., "A Demonstration of Passive Blade Twist Control Using Extension-Twist Coupling," Proceedings of the 33rd Structures, Structural Dynamics and Materials Conference, Dallas, TX, April 1992.
8. Nixon, M.W., "Aeroelastic Response and stability of tiltrotors with elastically coupled composite rotor blades," Ph.D. Dissertation, Dept. of Aerospace Engineering, University of Maryland, College Park., MD, September 1993.
9. Nixon, M.W., "Improvements to Tilt Rotor Performance Through Passive Blade Twist Control". NASA TM 100583, USAA VSCOM TM 88-B-010, April 1988.
10. Nixon, M.W., "Analytical and Experimental Investigations of Extension-Twist coupled Structures," M.S. Thesis, NASA Langley/George Washington University, 1989.
11. Oh, S., Librescu, L., and Song, O., "Thin-Walled Rotating Composite Blades Featuring Extension-Twist Coupling," Proceedings of the 45th Structures, Structural Dynamics and Material conference. Palm Springs, California., April 19-22, 2004.
12. Piatak, J. D., Nixon, M. W., and Kosmatka, B. J., "Stiffness Characteristics of Composite Rotor Blades with Elastic Couplings," NASA Technical Paper 3641/ARL Technical Report 1279, April 1997.
13. Chandra R., Stemple A, D., Chopra I., "Thin-walled composite beams under bending, torsional, and extensional loads," Journal of Aircraft, Vol. 27, (7), July 1990.
14. Smith, E. C., and Chopra, I., "Formulation and Evaluation of an Analytical Model for Composite Box-Beams," Journal of the American Helicopter Society, Vol. 36, No. 3, 1991, pp. 23-35.
15. Chandra R., and Chopra, I., "Experimental and Theoretical Analysis of Composite I-Beams with Elastic Couplings," Proceedings of the 32nd AIAA Structures, Structural Dynamics and Materials Conference, Baltimore, MD, April 8-10, 1991.
16. Hannibal, A. J., Gupta, B. P., Avila, J. A., and Parr, C. H. "Flexible Matrix Composites applied to bearing less rotor system," Proceedings of the American Helicopter Society, Composite Structures Specialist Meeting, Philadelphia, PA, March 1983.
17. Hannibal, A. J., and Avila, J. A., "A Torsionally Stiff-Bending Soft Driveshaft," Presented at the 39th Annual Conference, Reinforced Plastics/Composite Institute, The Society of the Plastic Industry, Inc., Jan 1984.
18. Shin, E., Wang, K. W., and Smith, E. C., "Characterization of Flexible Matrix Composite Rotorcraft Driveshafts," Proceedings of the American Helicopter Society 59th Annual Forum, Phoenix, Arizona, May 6-8, 2003.
19. Shan, Y., and Bakis, C., "Static and Dynamic Characterization of Flexible Matrix Composite material," Presented at the American Helicopter Society 58th Annual Forum, Montreal, Quebec, June 11-13, 2002.
20. Soykasap, O., and Hodges, H. Dewey., "Performance Enhancement of a Composite Tilt-Rotor Using Aeroelastic Tailoring," Journal of Aircraft, Vol. 37, No. 5, September-October 2000.
21. Volovoi, V., Hodges, D. H., Cesnik, C. E. S., and Popescu, B., "Assessment of beam modeling methods for Rotor Blade applications," Proceedings of the American Helicopter Society 55th Annual Forum, Montreal, Quebec, Canada., May 25-27, 1999.
22. Soykasap, O., "Aeroelastic Optimization of a Composite Tilt Rotor," Ph. D. Thesis, Georgia Institute of Technology, 1999.
23. Rehfield, L. W., Ali, R. Atligan, and Dewey H. Hodges., "Nonclassical Behavior of Thin-Walled Composite Beams with Closed Cross Sections," Journal of the American Helicopter Society, May 1990, pp. 42-49.
24. Floros, W. M., "Finite Element Modeling of Open-Section Composite Beams with Warping Restraint Effects," M.S. Thesis, Dept of Aerospace Engineering, The Pennsylvania State University, University Park, PA., August 1996.
25. Daniel, M. I., and Ishai, O., "Strength of Unidirectional Lamina," Engineering Mechanics of Composite Materials, Oxford University Press, Inc., New York, 1994.