Micromechanical modeling of thermal expansion coefficients for unidirectional glass fiber-reinforced polyimide composites containing silica nanoparticles

2017 ◽  
Vol 96 ◽  
pp. 110-121 ◽  
Author(s):  
M.K. Hassanzadeh-Aghdam ◽  
R. Ansari ◽  
A. Darvizeh
Keyword(s):  
Thermal Expansion ◽  
Glass Fiber ◽  
Silica Nanoparticles ◽  
Micromechanical Modeling ◽  
Fiber Reinforced ◽  
Thermal Expansion Coefficients ◽  
Glass Fiber Reinforced ◽  
Unidirectional Glass ◽  
Polyimide Composites ◽  
Expansion Coefficients

scholarly journals Micromechanical modeling of 8-harness satin weave glass fiber-reinforced composites

2016 ◽  
Vol 51 (5) ◽  
pp. 705-720 ◽  
Author(s):  
RS Choudhry ◽  
Kamran A Khan ◽  
Sohaib Z Khan ◽  
Muhammad A Khan ◽  
Abid Hassan
Keyword(s):  
Finite Element ◽  
Glass Fiber ◽  
Material Properties ◽  
Micromechanical Model ◽  
Unit Cell ◽  
Micromechanical Modeling ◽  
Void Content ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced

This study introduces a unit cell-based finite element micromechanical model that accounts for correct post cure fabric geometry, in situ material properties and void content within the composite to accurately predict the effective elastic orthotropic properties of 8-harness satin weave glass fiber-reinforced phenolic composites. The micromechanical model utilizes a correct post cure internal architecture of weave, which was obtained through X-ray microtomography tests. Moreover, it utilizes an analytical expression to update the input material properties to account for in situ effects of resin distribution within yarn (the yarn volume fraction) and void content on yarn and matrix properties. This is generally not considered in modeling approaches available in literature and in particular, it has not been demonstrated before for finite element micromechanics models of 8-harness satin weave composites. The unit cell method is used to obtain the effective responses by applying periodic boundary conditions. The outcome of the analysis based on the proposed model is validated through experiments. After validation, the micromechanical model was further utilized to predict the unknown effective properties of the same composite.

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