Numerical method for optimizing design variables of carbon-fiber-reinforced epoxy composite coil springs

Bok Lok Choi, Byoung-Ho Choi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

To successfully reduce a vehicle's weight by replacing steel with composite materials, it is essential to optimize the material parameters and design variables of the structure. In this study, we investigated numerical and experimental methods for determining the ply angles and wire diameters of carbon fiber/epoxy composite coil springs to attain a spring rate equal to that of an equivalent steel component. First, the shear modulus ratio for two materials was calculated as a function of the ply angles and compared with the experimental results. Then, by using the equation of the spring rate with respect to the shear modulus and design variables, normalized spring rates were obtained for specific ply angles and wire diameters. Finally, a finite element model for an optimal composite coil spring was constructed and analyzed to obtain the static spring rate, which was then compared with the experimental results.

Original languageEnglish
Pages (from-to)42-49
Number of pages8
JournalComposites Part B: Engineering
Volume82
DOIs
Publication statusPublished - 2015 Dec 1

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Carbon fibers
Numerical methods
Steel
Composite materials
Elastic moduli
Wire
carbon fiber

Keywords

  • A. Polymer-matrix composites (PMCs)
  • B. Elasticity
  • C. Finite element analysis (FEA)
  • D. Mechanical testing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

Cite this

Numerical method for optimizing design variables of carbon-fiber-reinforced epoxy composite coil springs. / Choi, Bok Lok; Choi, Byoung-Ho.

In: Composites Part B: Engineering, Vol. 82, 01.12.2015, p. 42-49.

Research output: Contribution to journalArticle

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