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Mechanics of Composite Materials

, Volume 55, Issue 3, pp 325–336 | Cite as

Equistrong Branchy Composite Beams with a Constant Total Area of Variable Elliptic Cross Sections

  • A. N. PolilovEmail author
  • N. A. Tatus
  • X. Tian
  • A. S. Arutjunova
Article
  • 9 Downloads

It is shown that it is possible to create branchy and shaped composite leaf springs with a constant cross-sectional area and three-fold reduced weight, at a given level of accumulated elastic energy, by choosing an appropriate spring geometry. The advantages of branching in comparison with shaping are the absence of cut fibers, exclusion of fiber disorientation, and the possibility of decreasing the spring size by combining its leafs into a bundle. The use of a unidirectional GFRP makes it possible to multiply reduce the spring weight compared with that of a steel analog with the same strength and stored energy requirements. An efficient use of branchy composite springs is possible for transport systems and, in the future, for space-based constructions due to their low weight and the extremely low energy of their production, and these factors allow one, in principle, to create such springs directly in orbit conditions.

Keywords

composite material low-modulus and high-strength GFRP stored elastic energy equistrong leaf spring branchy and shaped structure Leonardo’s rule elliptic cross section 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • A. N. Polilov
    • 1
    Email author
  • N. A. Tatus
    • 1
  • X. Tian
    • 2
  • A. S. Arutjunova
    • 1
  1. 1.A. A. Blagonravov Mechanical Engineering Research InstituteRussian Academy of SciencesMoscowRussia
  2. 2.State Key Laboratory of Engineering Manufacturing SystemsXi’an Jiaotong UniversityXi’anP.R. China

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