Numerical Modeling of the Effects of Fiber Packing and Reinforcement Volume Ratio on the Transverse Elasticity Modulus of a Unidirectional Composite Material Glass / Epoxy
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Date
2020-12-06
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Revue des Composites et des Matériaux Avancés-Journal of Composite and Advanced Materials
Abstract
Composite materials are very widely used in the manufacturing of structures because of
their specific mechanical properties. However, they are characterized by heterogeneity
and anisotropy and they present great challenges in designing and also in predicting their
behavior by using the numerical simulation. The unidirectional composite material has a
more relevant property which is the transverse elasticity modulus E2. The determination
of E2 is still interesting researchers because of the diversity of results obtained by several
models and approaches. This study aims to predict the transverse elasticity modulus E2
of a unidirectional Glass/Epoxy composite material, the effect of the arrangement fibers
on the transverse elasticity modulus and predict the values of the reinforcement factorξ
used in the Halpin-Tsai model. To do so first we adopted the micromechanical approach,
which is accurate but requires much computing, and we used a calculation code based on
FEM method and considered two parameters to vary, which are the volume fraction of
fibers and the distribution of fibers. The obtained results of numerical modeling were
tightly compared to those obtained by the available analytical models and the adopted
approach can be used to predict the transverse elasticity modulus E2 and the
reinforcement factor ξ.
Description
Composite materials are very widely used in the manufacturing of structures because of
their specific mechanical properties. However, they are characterized by heterogeneity
and anisotropy and they present great challenges in designing and also in predicting their
behavior by using the numerical simulation. The unidirectional composite material has a
more relevant property which is the transverse elasticity modulus E2. The determination
of E2 is still interesting researchers because of the diversity of results obtained by several
models and approaches. This study aims to predict the transverse elasticity modulus E2
of a unidirectional Glass/Epoxy composite material, the effect of the arrangement fibers
on the transverse elasticity modulus and predict the values of the reinforcement factorξ
used in the Halpin-Tsai model. To do so first we adopted the micromechanical approach,
which is accurate but requires much computing, and we used a calculation code based on
FEM method and considered two parameters to vary, which are the volume fraction of
fibers and the distribution of fibers. The obtained results of numerical modeling were
tightly compared to those obtained by the available analytical models and the adopted
approach can be used to predict the transverse elasticity modulus E2 and the
reinforcement factor ξ.