scholarly journals Numerical Modeling of the Effects of Fiber Packing and Reinforcement Volume Ratio on the Transverse Elasticity Modulus of a Unidirectional Composite Material Glass / Epoxy

2020 ◽  
Vol 30 (5-6) ◽  
pp. 203-210
Author(s):  
Brek Samir ◽  
Meddour Belkacem ◽  
Groun Brahim
Keyword(s):  
Numerical Modeling ◽  
Composite Material ◽  
Elasticity Modulus ◽  
Volume Fraction ◽  
Volume Ratio ◽  
Unidirectional Composite ◽  
Analytical Models ◽  
Unidirectional Composite Material ◽  
Two Parameters ◽  
Reinforcement Factor

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 factor 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.

scholarly journals Experimental and Numerical Study on the Effect of Creep Behavior on Epoxy Composites Reinforced with Yttrium Oxide Powder

2020 ◽  
Vol 25 (4) ◽  
pp. 203-213
Author(s):  
B.H. Abed ◽  
K.J. Jadee ◽  
A.A. Battawi
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Elasticity Modulus ◽  
Epoxy Composite ◽  
Numerical Study ◽  
Creep Behaviour ◽  
Weight Ratio ◽  
Volume Ratio ◽  
Epoxy Composites ◽  
Creep Characteristics

AbstractThe creep test is one of the important approaches to determining some mechanical properties of composite materials. This study was carried out to investigate the creep behaviour of an epoxy composite material that was reinforced with Y2O3 powder at weight ratios of 2%, 7%, 12%, 17% and 22%. Each volume ratio was subjected to five loads over the range of 1N to5N at a constant temperature of 16 ± 2°C. In this work, creep behaviour, stress and elasticity modulus were studied through experimental and numerical analyses. Results showed that increasing the weight ratio of Y2O3 powder enhanced creep characteristics.

Design Optimization of Material Properties in a Particle-Filled Composite Material System

2008 ◽  
Author(s):  
Siva P. Gurrum ◽  
Jie-Hua Zhao ◽  
Darvin R. Edwards
Keyword(s):  
Composite Material ◽  
Young’S Modulus ◽  
Material Properties ◽  
Poisson’S Ratio ◽  
Volume Fraction ◽  
Filler Content ◽  
Young's Modulus ◽  
Random Packing ◽  
Poisson's Ratio ◽  
Analytical Models

This work presents a methodology implementing random packing of spheres combined with commercial finite element method (FEM) software to optimize the material properties, such as Young’s modulus, Poisson’s ratio, coefficient of thermal expansion (CTE) of two-phase materials used in electronic packaging. The methodology includes an implementation of a numerical algorithm of random packing of spheres and a technique for creating conformal FEM mesh of a large aggregate of particles embedded in a medium. We explored the random packing of spheres with different diameters using particle generation algorithms coded in MATLAB. The FEM meshes were generated using MATLAB and TETGEN. After importing the nodes and elements databases into commercial FEM software ANSYS, the composite materials with spherical fillers and the polymer matrix were modeled using ANSYS. The effective Young’s modulus, Poisson’s ratio, and CTE along different axes were calculated using ANSYS by applying proper loading and boundary conditions. It was found that the composite material was virtually isotropic. The Young’s modulus and Poisson’s ratio calculated by FEM models were compared to a number of analytical solutions in the literature. For low volume fraction of filler content, the FEM results and analytical solutions agree well. However, for high volume fraction of filler content, there is some discrepancy between FEM and analytical models and also among the analytical models themselves.

scholarly journals PEMBUATAN DAN KARAKTERISASI KOMPOSIT RESIN – ABU GOSOK DAN RESIN – SEKAM PADI

2018 ◽  
Vol 3 (2) ◽  
pp. 77-84
Author(s):  
Muhammad Lawrence Pattersons ◽  
Arin Naripa ◽  
Sendiko Janu Winarno ◽  
Siti Mawaddah Abhan ◽  
Edi Sanjaya
Keyword(s):  
Composite Material ◽  
Elasticity Modulus ◽  
Composite Resin ◽  
Volume Ratio ◽  
Flexural Test ◽  
The Matrix ◽  
Weight Decrease ◽  
Keywords Composite

Abstrak Telah dilakukan proses pembuatan dua buah material komposit dengan masing-masing filler berupa abu gosok dan sekam padi, matriks berupa resin. Pada komposit resin – abu gosok, perbandingan volume antara filler dan matriks adalah 1:1, sedangkan pada komposit resin – sekam padi digunakan tiga perbandingan volume antara filler dan matriks, yaitu 1:1, 1:2, dan 2:1. Setelah proses pembuatan selesai, dilakukan pengujian TGA dan pengujian kelenturan tiga titik untuk setiap jenis komposit yang dihasilkan. Pada hasil pengujian TGA, didapatkan bahwa penurunan bobot paling besar yang pada komposit resin – abu gosok terjadi pada temperatur 390,29 ºC, sedangkan pada komposit resin – sekam padi terjadi pada temperatur 399,86 ºC. Hasil pengujian kelenturan tiga titik menunjukkan bahwa modulus elastisitas untuk sampel komposit resin – abu gosok adalah sebesar 4,97  109 N/m2, sedangkan untuk sampel-sampel resin – sekam padi berada pada orde 108 N/m2 dan 106 N/m2. Secara keseluruhan, dapat dikatakan bahwa komposit resin – sekam padi yang dihasilkan memiliki ketahanan temperatur yang lebih baik dan lebih elastis dibandingkan komposit resin – abu gosok. Kata-kata kunci: komposit, resin, abu gosok, sekam padi.   Abstract We have done the fabrication of two kinds of composite material the fillers that we used rub ash for one type of composite and the husk of rice for another, the matrix for both is resin. The resin – rub ash composite, the volume ratio of filler and matrix is 1:1, while in the resin – husk of rice composite we used three volume ratios, those are 1:1, 1:2, and 2:1. After the process of fabrication was done, we did TGA test and three points flexural test for every composite we fabricated. The results of TGA test show that the most significant weight decrease of resin – rub ash composite occurred at 390,29 ºC, while the resin – rub ash composite's most considerable weight decrease occurred at 399,86 ºC. The results of three points flexural test show that elasticity of resin – rub ash composite is 4,97 x 109 N/m2, while elasticity modulus of all kinds of the resin – husk of rice composite is in order of 108 N.m2 and 106 N/m2. Overall, we can conclude that the resin – husk of rice composite is more heatproof and more elastic than the resin – rub ash composite. Keywords: composite, resin, rub ash, the husk of rice.

Nonlinear Viscoelastic Analysis of a Unidirectional Composite Material

1981 ◽  
Vol 48 (4) ◽  
pp. 859-865 ◽  
Author(s):  
B. G. Schaffer ◽  
D. F. Adams
Keyword(s):  
Composite Material ◽  
Unidirectional Composite ◽  
Time Dependent ◽  
Creep Recovery ◽  
Viscoelastic Analysis ◽  
Nonlinear Viscoelastic ◽  
The Matrix ◽  
Single Integral ◽  
Unidirectional Composite Material ◽  
Composite Response

The single-integral nonlinear viscoelastic constitutive equations developed by Schapery from thermodynamic theory have been adapted to analyze the time-dependent response of a unidirectional composite material. This viscoelastic analysis has been combined with an existing time-independent elastoplastic micromechanics analysis, to permit the study of nonlinear time-dependent response of materials loaded beyond their elastic limit. Literature values as well as a brief series of creep-recovery tests on a typical epoxy resin were used to characterize the nonlinear viscoelastic response of the matrix constituent of a composite material. Composite response under transverse loading at various stress levels was then predicted, and the results compared with actual composite creep data.

Sign in / Sign up

Export Citation Format

Share Document