Estimation of Instantaneous Shear Modulus in Neat Resin and Multi-walled Nanotube-Reinforced Carbon Epoxy Composites by Finite Element Analysis

This paper presents a method to simulate the mechanical behavior of magnetorheological fluid (MRF) subjected to magnetic field in the pre-yield region in ANSYS. The main idea is to devide an MRF element into two coincident elements, one of them has density and viscosity without shear modulus while another has shear modulus without density and viscosity. Taking a simply supported MRF sandwich beam as an example, good results and reasonable conclusion are obtained by comparing the results with the theoretical analysis and experimental study of Ref.[1]. The validity of finite element analysis is also investigated in this paper. At present, there is no exactly appropriate element type in ANSYS to model MRF, this kind of method called coincident elements method (CEM) will provide a new way to model the structures with MRF or MR dampers in ANSYS, and it also has reference roles for the future development of related elements in ANSYS.

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Finite element analysis for predicting the vibration characteristics of natural fiber reinforced epoxy composites

Materials Today Proceedings ◽

10.1016/j.matpr.2020.08.717 ◽

2020 ◽

Author(s):

Mohit Kumar Saini ◽

Ashok Kumar Bagha ◽

Sanjay Kumar ◽

Shashi Bahl

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Natural Fiber ◽

Vibration Characteristics ◽

Epoxy Composites ◽

Fiber Reinforced ◽

Element Analysis

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Shear Test on CFRP Full-Field Measurement and Finite Element Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.112.49 ◽

2010 ◽

Vol 112 ◽

pp. 49-62 ◽

Cited By ~ 3

Author(s):

Sébastien Mistou ◽

Marina Fazzini ◽

Moussa Karama

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Shear Modulus ◽

Shear Test ◽

Image Correlation ◽

Optical Methods ◽

Strain Gauges ◽

Element Analysis ◽

Full Field ◽

Full Field Measurement

The purpose of this work is to study the Iosipescu shear test and more precisely its ability to characterize the shear modulus of a carbone/epoxy composite material. The parameters influencing this identification are the fibre orientation, the geometry of the notch and the boundary conditions. Initially these parameters were studied through the finite element analysis of the shear test. Then, the measurement of the shear strains was carried out by traditional methods of measurement (strain gauges) but also by optical methods. These optical methods: the digital image correlation and the electronic speckle pattern interferometry (ESPI); allow for various levels of loading, to reach a full-field measurement of the shear strain. This enabled us to study the strain distribution on the section between the two notches. The finite element model enabled us to study the parameters influencing the calculation of the shear modulus in comparison with strain gauges, image correlation and ESPI. This work makes it possible to conclude on optimal parameters for the Iosipescu test.

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Modal analysis of 3D needled waste cotton fiber/epoxy composites with experimental and numerical methods

Textile Research Journal ◽

10.1177/0040517520944477 ◽

2020 ◽

pp. 004051752094447 ◽

Cited By ~ 2

Author(s):

Linlin Lu ◽

Wei Fan ◽

Xue Meng ◽

Tao Liu ◽

Ling Han ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Epoxy Composites ◽

Mode Shapes ◽

Analysis Method ◽

Fiber Volume ◽

Element Analysis ◽

The Finite Element Analysis ◽

Waste Cotton Fiber ◽

Vibration Parameters

The small-size microstructure models of the 3D needled waste cotton fiber/epoxy composites (3DNWCFCs) were brought out to predict their key vibration parameters (natural frequency and mode shapes) with the finite element analysis method. Six kinds of 3DNWCFCs with different parameters were prepared and tested by the experimental modal analysis method to verify the accuracy of the prediction of the natural frequencies and mode shapes with the finite element method. The effects of the fiber volume content and needling density of the composites on the modal behavior were investigated. The natural frequency of the cantilever beams of the composites increased with the increase of the fiber volume content and increased at first then decreased with the increasing needling density. The effect of needling density on the vibration properties of the composite depended on the degree of damage and entanglement of Z-direction fibers. The comparative analysis of the finite element analysis and the experimental results showed that the small-size microstructure models of the 3DNWCFCs were effective to predict their vibration parameters. Therefore, the small-size finite element models can be used to predict the modal properties of the staple fiber reinforced composites effectively with less time and lower economic costs.

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Finite element analysis of projectile nose shapes in ballistic perforation of 2D plain woven Kevlar/epoxy composites using multi-scale modelling

Journal of Industrial Textiles ◽

10.1177/1528083720970168 ◽

2020 ◽

pp. 152808372097016

Author(s):

Mithilesh Kumar Dewangan ◽

SK Panigrahi

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Plate Thickness ◽

High Strength ◽

Matrix Cracking ◽

Epoxy Composites ◽

Target Plate ◽

Element Analysis ◽

Multi Scale ◽

Scale Modelling

The present research deals with the finite element analysis (FEA) considering high strength Kevlar/epoxy composites as a target plate subjected to ballistic impact by varying nose-shaped projectiles. A multi-scale modelling technique has been implemented with FEA to design the intricate weave architecture. The damage properties are adopted using a user-defined function in the explicit analysis. The proposed methodology is validated by the available literature. The conical-shaped projectiles will have more damage and penetration as compared to the flat projectiles, which are studied for two plate thickness. The conical 60° and conical 90° projectiles will have better penetration to the target plate even for the increased thickness, whereas the Conical 120° and Flat projectiles will have a significant reduction in residual velocities. Also, with the increment in thickness, the energy absorption will significantly increase for Flat projectiles as compared to the conical projectiles. For lower velocities, the yarn slippage and puncturing are the major factors of failure along with fiber breakage and matrix cracking. As the velocities increased, the dominant phenomena of failure will be the linear momentum transfer.

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Finite Element Analysis of X-Cor Sandwich’s Shear Modulus

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.328-330.1113 ◽

2011 ◽

Vol 328-330 ◽

pp. 1113-1117

Author(s):

Xu Dan Dang ◽

Shao Jie Shi ◽

Jin San Jiang ◽

Jun Xiao

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Shear Modulus ◽

Finite Element Model ◽

Geometric Analysis ◽

Element Model ◽

Analysis Model ◽

Element Analysis ◽

Finite Element Software ◽

The Finite Element Model

Through the observation of photomicrographs of resin regions around Z-pin ends, the basic hypothesis of the elliptic configuration of resin regions in the X-cor sandwich were proposed. The parametric equations for describing the microscopic structures of resin regions were given. Then the geometric analysis model of X-cor sandwich was established. The finite element software ANSYS was used to establish the finite element model of the shear modulus and the shear modulus was calculated. The error range of finite element analysis is between ±10%. So the rationality of finite element model is verified and the finite element model can be used to forecast the shear modulus.

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