A micromechanical model for predicting biaxial tensile moduli of plain weave fabric composites

This article presents a new micromechanical model to predict biaxial tensile moduli of plain weave fabric composites by considering the interaction between the orthogonal interlacing strands. The two orthogonal yarns in micromechanical unit cell were idealized as curved beams with a path depicted using sinusoidal shape functions. The biaxial tensile moduli of plain weave fabric composites were derived by means of the minimum total complementary potential energy principle founded on micromechanics. Biaxial tensile tests were conducted on the resin transfer molding–made EW220/5284 plain weave fabric composites at five biaxial loading ratios of 0, 1, 2, 3 and ∞ to validate the new model. Predictions from the new model were compared with experimental data. Good correlation was achieved between the predictions and actual experiments, demonstrating the practical and effective use of the proposed model. Using the new model, the biaxial tensile moduli of plain weave fabric composites can be predicted based only on the properties of basic woven fabric.

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New Micromechanical Model for Predicting Biaxial Tensile Moduli of Plain Weave Fabric Composites

10.20944/preprints201611.0084.v1 ◽

2016 ◽

Author(s):

Jiangbo Bai ◽

Junjiang Xiong ◽

Qiang Wang

Keyword(s):

Biaxial Loading ◽

Micromechanical Model ◽

Tensile Tests ◽

Woven Fabric ◽

Curved Beams ◽

Energy Principle ◽

New Model ◽

Plain Weave ◽

Biaxial Tensile ◽

Weave Fabric

This paper addresses a new micromechanical model to predict biaxial tensile moduli of plain weave fabric (PWF) composites by considering the interaction between the orthogonal interlacing strands. The two orthogonal yarns in micromechanical unit cell (UC) were idealized as the curved beams with a path depicted by using sinusoidal shape functions. The biaxial tensile moduli of PWF composites were derived by means of the minimum total complementary potential energy principle founded on micromechanics. The biaxial tensile tests were respectively conducted on the RTM-made EW220/5284 PWF composites at five biaxial loading ratios of 0, 1, 2, 3 and ∞ to validate the new model. The predictions from the new model were compared with experimental data and good correlation was achieved between the predictions and actual experiments, demonstrating the practical and effective use of the proposed model. Using the new model, the biaxial tensile moduli of plain weave fabric (PWF) composites could be predicted based only on the properties of basic woven fabric.

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A general micromechanical model to predict elastic and strength properties of balanced plain weave fabric composites

Journal of Composite Materials ◽

10.1177/0021998317716530 ◽

2017 ◽

Vol 51 (20) ◽

pp. 2863-2878 ◽

Cited By ~ 3

Author(s):

MM Shokrieh ◽

R Ghasemi ◽

R Mosalmani

Keyword(s):

Mechanical Properties ◽

Mechanical Behavior ◽

Elastic Properties ◽

Present Model ◽

Micromechanical Model ◽

Homogenization Method ◽

Plain Weave ◽

Weave Fabric ◽

Fabric Composites ◽

Out Of Plane

In the present research, a micromechanical-analytical model was developed to predict the elastic properties and strength of balanced plain weave fabric composites. In this way, a new homogenization method has been developed by using a laminate analogy method for the balanced plain weave fabric composites. The proposed homogenization method is a multi-scale homogenization procedure. This model divides the representative volume element to several sub-elements, in a way that the combination of the sub-elements can be considered as a laminated composite. To determine the mechanical properties of laminates, instead of using an iso-strain assumption, the assumptions of constant in-plane strains and constant out-of-plane stress have been considered. The applied assumptions improve the accuracy of prediction of mechanical properties of balanced plain weave fabrics composites, especially the out-of-plane elastic properties. Also, the stress analysis for prediction of strain–stress behavior and strength has been implemented in a similar manner. In addition, the nonlinear mechanical behavior of balanced plain weave composite is studied by considering the inelastic mechanical behavior of its polymeric matrix. To assess the accuracy of the present model, the results were compared with available results in the literature. The results, including of engineering constants (elastic modulus and Poisson’s ratio) and stress–strain behavior show the accuracy of the present model.

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Measurement and Prediction of Effective Thermal Conductivity for Woven Fabric Composites

International Journal of Modern Physics B ◽

10.1142/s0217979203019708 ◽

2003 ◽

Vol 17 (08n09) ◽

pp. 1808-1813 ◽

Cited By ~ 6

Author(s):

Nam Seo Goo ◽

Kyeongsik Woo

Keyword(s):

Fiber Volume Fraction ◽

Volume Fraction ◽

Woven Fabric ◽

Fiber Volume ◽

Plain Weave ◽

Woven Fabric Composites ◽

Weave Fabric ◽

Experimental Apparatus ◽

Fabric Composites ◽

Thermal Conductivities

The current paper deals with the measurement and prediction of thermal conductivities for plain weave fabric composites. An experimental apparatus was setup to measure the temperature gradients from which the thermal conductivities were obtained. The thermal conductivities were also calculated using finite element analyses for plain weave unit cell models and then compared with experimental results. In addition, the effect of a phase shift and the fiber volume fraction in the tow on the thermal conductivities was addressed.

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