DAMPING MEASUREMENTS OF GRAPHITE-ALUMINUM COMPOSITES. Conference Paper uri icon

abstract

  • Continuous fiber reinforced graphite-aluminum (Gr/Al) composites are candidate structural materials for space structures, because of their high specific properties. In addition, design requirements indicate damping as a critical structural or material property. Therefore, the damping capacity of Gr/Al was measured in flexural and extensional modes of vibration by using fixed-free flexure and uniaxial tension-tension cycling test methods respectively. Extraneous sources of vibrational energy losses were identified and minimized to establish the inherent damping characteristics of Gr/Al composites. Damping measurements conducted at low strain levels (50 multiplied by 10** minus **6-700 multiplied by 10** minus **6) and low frequency ranges (0. 4-150 Hz) exhibited strain amplitude dependent behavior.

author list (cited authors)

  • Rawal, S. P., Armstrong, J. H., Misra, M. S., Ray, A. K., & Kinra, V. K.

publication date

  • December 1986