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Estimation of the reinforcement factor [epsilon] for calculating the transverse stiffness E2 with the Halpin-Tsai equations using the finite element method

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URI: https://hdl.handle.net/10016/36050
ISSN: 0263-8223
DOI: https://doi.org/10.1016/j.compstruct.2015.01.008
UXXI: AR/0000016657
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estimation_CS_2015_ps.pdf (1.95 MB)
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2015-06-01
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Elsevier
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Abstract
In this work, an estimation of the reinforcement factor [epsilon] of the Halpin–Tsai equations used to calculate the transverse stiffness E[subíndice 2] is provided. An improved estimation of the value [epsilon]=2 originally proposed by Halpin and Tsai is given through a set of finite element analyses that consider randomly distributed unidirectional fibers for different volume fractions. The analysis overcomes the original hypothesis of a square array distribution of fibers in the transverse plane. It is concluded that a value of [epsilon]=1.5 is a better estimation for the usual volume fractions found in practice for a unidirectional lamina of fiber reinforced composites.
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Reinforcement factor, Transverse stiffness, Unidirectional lamina, Finite element analysis
Bibliographic citation
Composite Structures, (2015), v. 124, pp.: 402-408.
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