Manufacture and test of extension-twist coupled energy absorbing composite tubes

Todd C. Henry, Chandrashekhar Tiwari, Charles E. Bakis, Edward C. Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Novel extension-twist coupled composite energy absorbing devices are manufactured and tested for the first time. The absorbers consist of a concentric pair of fiber reinforced tubes that twist in opposite directions when loaded in axial tension. Energy is dissipated in an annular region of foam in between the two tubes. Carbon fiber reinforced elastomeric matrix composites are used for their excellent extension-twist coupling characteristics. Tension grips that allow for free rotations at one end of the device while the other end is clamped were devised for demonstrating the feasibility of the energy absorption concept. The force-displacement characteristic of the devices is shown to be highly dependent on the fiber angles of the tubes. Fiber orientations of ±30 provide superior strength, while the ±45 orientations provide superior load-limiting behavior. The devices are under current investigation for potential applications in preventing payload and equipment mounting point failures in rotorcraft during crash events and thereby improving crashworthiness.

Original languageEnglish (US)
Title of host publication67th American Helicopter Society International Annual Forum 2011
Pages895-905
Number of pages11
StatePublished - Jul 28 2011
Event67th American Helicopter Society International Annual Forum 2011 - Virginia Beach, VA, United States
Duration: May 3 2011May 5 2011

Publication series

NameAnnual Forum Proceedings - AHS International
Volume2
ISSN (Print)1552-2938

Other

Other67th American Helicopter Society International Annual Forum 2011
CountryUnited States
CityVirginia Beach, VA
Period5/3/115/5/11

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Henry, T. C., Tiwari, C., Bakis, C. E., & Smith, E. C. (2011). Manufacture and test of extension-twist coupled energy absorbing composite tubes. In 67th American Helicopter Society International Annual Forum 2011 (pp. 895-905). (Annual Forum Proceedings - AHS International; Vol. 2).