Effect of Nanocomposite Microstructure on Stochastic Elastic Properties: An Finite Element Analysis Study

This paper addresses the effect of microstructure uncertainties on elastic properties of nanocomposites using finite element analysis (FEA) simulations. Computer-simulated microstructures were generated to reflect the variability observed in nanocomposite microstructures. The effect of waviness, agglomeration, and orientation of carbon nanotubes (CNTs) were investigated. Generated microstructures were converted to image-based 2D FEA models. Two hundred different realizations of microstructures were generated for each microstructure type to capture the stochastic response. The results confirm previously reported findings and experimental results. The results show that for a given fiber volume fraction, CNTs orientation, waviness, and agglomeration result in different elastic properties. It was shown that while a given microstructural feature will improve the elastic property, it will increase the variability in the elastic properties.

Download Full-text

Evaluation of fiber volume fraction of kenaf-coir-epoxy based green composite by finite element analysis

Materials Today Proceedings ◽

10.1016/j.matpr.2021.08.147 ◽

2021 ◽

Author(s):

Shikha Parashar ◽

V.K. Chawla

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fiber Volume Fraction ◽

Volume Fraction ◽

Green Composite ◽

Fiber Volume ◽

Element Analysis

Download Full-text

Finite Element Analysis of Interfacial Debonding Damage in Fiber-Reinforced Ceramic Matrix Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.546-549.1555 ◽

2007 ◽

Vol 546-549 ◽

pp. 1555-1558

Author(s):

Chun Jun Liu ◽

Yue Zhang ◽

Da Hai Zhang ◽

Zhong Ping Li

Keyword(s):

Finite Element ◽

Fiber Volume Fraction ◽

Volume Fraction ◽

Ceramic Matrix Composites ◽

Ceramic Matrix ◽

Interfacial Debonding ◽

Matrix Composites ◽

Fiber Reinforced ◽

Fiber Volume ◽

Element Analysis

In this paper the composite fracture process has been simulated via the finite element method. A micromechanics model was developed to predict the stress-strain response of a SiO2f/ SiO2 composite explicitly accounting for the local damage mechanisms such as fiber fracture and interfacial debonding. The effects of interfacial strength and fiber volume fraction on the toughness of fiber-reinforced ceramic matrix composites were investigated. The results showed that the composite failure behaviors correlated with the interface strength, which could achieve an optimum value for the elevation of the composite toughness. The increase of fiber volume fraction can make more toughening contributions.

Download Full-text

Effect of the Carbon Nanotube Distribution on the Thermal Conductivity of Composite Materials

Journal of Heat Transfer ◽

10.1115/1.4029034 ◽

2015 ◽

Vol 137 (3) ◽

Cited By ~ 5

Author(s):

Iman Eslami Afrooz ◽

Andreas Öchsner

Keyword(s):

Thermal Conductivity ◽

Carbon Nanotubes ◽

Finite Element Analysis ◽

Composite Materials ◽

Fiber Volume Fraction ◽

Volume Fraction ◽

Fiber Volume ◽

Element Analysis ◽

The Matrix ◽

Good Agreement

Finite element analysis has been employed to investigate the effect of carbon nanotubes (CNTs) distribution on the thermal conductivity of composite materials. Several kinds of representative volume elements (RVEs) employed in this study are made by assuming that unidirectional CNTs are randomly distributed in a polymer matrix. It is also assumed that each set of RVEs contains a constant fiber volume fraction and aspect ratio. Results show that randomness—the way in which fibers are distributed inside the matrix—has a significant effect on the thermal conductivity of CNT composites. Results of this study were compared using the analytical Xue and Nan model and good agreement was observed.

Download Full-text

Study on Nonlinear Finite Element Analysis Method of Multi-Ribbed Composite Slab Structure Containing Steel Fibers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.3975 ◽

2011 ◽

Vol 250-253 ◽

pp. 3975-3982 ◽

Cited By ~ 1

Author(s):

Ji Sheng Qiu

Keyword(s):

Finite Element ◽

Fiber Volume Fraction ◽

Steel Fiber ◽

Volume Fraction ◽

Plastic Hinge ◽

Analysis Method ◽

Fiber Volume ◽

Element Analysis ◽

Fiber Concrete ◽

Steel Fiber Concrete

Steel fiber concrete multi-ribbed composite slab system includes material composite and structure type composite, which has good mechanical and thermal insulation properties. This paper presents an assessment of the structure investigated using three-dimensional nonlinear finite elemental analysis. The analysis firstly has focused on solving the constitutive relation of the materials and the effect of steel fiber to determine the finite element simulation. Moreover nonlinear finite element analysis for the mechanical properties of the whole process on the composite structure system has been presented in this paper, and by changing the fiber volume fractionvf(0%, 1%, 2% and 3%) the parameter has been discussed. The analysis results show that stress distributions of the structure are close for different concrete strength and steel fiber volume fraction before formation of the plastic hinge lines of the upper edges. When the structure began to crack and the plastic hinge lines of upper edge gradually formed, due to the influence of the redistribution of internal forces, the steel fiber volume fraction has significant impact for the mechanic behavior of the structure. In addition, the steel fiber volume fraction on the developing and distribution of the cracks has little effect. This analysis method and results for the steel fiber concrete multi-ribbed composite structure can provide some valuable references for the structure research and application.

Download Full-text