Giner, EugenioVercher Martínez, AnaMarco Esteban, MiguelArango, Camila2022-11-182022-11-182015-06-01Composite Structures, (2015), v. 124, pp.: 402-408.0263-8223https://hdl.handle.net/10016/36050In 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.6eng© 2015 Elsevier Ltd. All rights reserved.Atribución-NoComercial-SinDerivadas 3.0 EspañaReinforcement factorTransverse stiffnessUnidirectional laminaFinite element analysisEstimation of the reinforcement factor [epsilon] for calculating the transverse stiffness E2 with the Halpin-Tsai equations using the finite element methodresearch articleIngeniería Civil y de la ConstrucciónIngeniería Industrialhttps://doi.org/10.1016/j.compstruct.2015.01.008open access402408COMPOSITE STRUCTURES124AR/0000016657