Strength Anisotropy Estimation of Plain-Weave Fabrics by Pseudo-Continuum Model

2006 ◽  
Vol 306-308 ◽  
pp. 835-840 ◽  
Author(s):  
Osamu Kuwazuru ◽  
Nobuhiro Yoshikawa
Keyword(s):  
Finite Element ◽  
Tensile Strength ◽  
Deformation Behavior ◽  
Continuum Model ◽  
Uniaxial Extension ◽  
Woven Fabric ◽  
Plain Weave ◽  
Weave Fabric ◽  
The Continuum ◽  
The Ideal

The anisotropy of the tensile strength of plain-weave fabric is numerically evaluated by the finite element simulations. The plain-weave fabrics show complicated deformation behavior that is quite different from that of the continuum. The mechanics of woven fabric is not sophisticated yet enough to evaluate the strength and fracture mechanism in arbitrary stress conditions. The opacity of the tensile strength significantly diminishes the material reliability for the advanced use of fabrics. This study addresses the ideal tensile strength in arbitrary directions by using the pseudo-continuum model, which we have proposed to predict the deformation behavior and fiber stresses of the plain-weave fabrics. In this study, the numerical simulations of uniaxial extension in various directions are carried out by one finite element subjected to ideally uniform deformation, and we predict the breaking loads and elongations corresponding to the ultimate strength of the fiber.

An analytical approach for predicting the tensile strength of plain weave fabric composites

2018 ◽  
Vol 40 (6) ◽  
pp. 2391-2399
Author(s):  
Qian Wang ◽  
Lingyu Sun ◽  
Wu Yang ◽  
Bowen Zhan ◽  
Xudong Yang
Keyword(s):  
Tensile Strength ◽  
Analytical Approach ◽  
Plain Weave ◽  
Weave Fabric ◽  
Fabric Composites

An Application of Finite-Element Method To The Deformation Analysis of Coated Plain-Weave Fabrics

1982 ◽  
Vol 11 (4) ◽  
pp. 310-327
Author(s):  
H. Irokazu ◽  
M. Inami ◽  
Yoshio Nakahara
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Uniaxial Stress ◽  
Deformation Analysis ◽  
Strength Analysis ◽  
The Finite Element Method ◽  
Membrane Structures ◽  
Plain Weave ◽  
Weave Fabric ◽  
Element Method

Methods for analysing coated plain-weave fabric which has properties of nonlinear elasticity have not yet been satisfactorily developed. In this paper, a method which is promis ing for use in engineering applications like the strength analysis of membrane structures is presented. The finite element method using a rectangular element consisting of plain-weave fabric and coating material which is assumed to be an isotropic elastic plate of plane stress is applied to the method. Verification of the me thod is made by using uniaxial stress-strain responses. A square piece of coated plain-weave fabric with a square hole in it is analyzed as an example of application of the present method. Key Words: coated plain-weave fabrics; finite element method; nonlinearly elastic biaxial response; geometrically nonlinear prob lem ; incremental approach.

3D Geometrical Model of Plain Weave Fabrics for Finite Element Analysis

2011 ◽  
Vol 332-334 ◽  
pp. 1635-1638 ◽  
Author(s):  
Dong Ning Wang ◽  
Ya Nan Jiao ◽  
Jia Lu Li
Keyword(s):  
Finite Element ◽  
Geometrical Model ◽  
Hexahedral Mesh ◽  
Element Analysis ◽  
3D Finite Element ◽  
Plain Weave ◽  
Geometry Model ◽  
Element Simulation ◽  
Section Shape ◽  
Weave Fabric

Woven unit-cell geometry functions are presented for a balanced plain weave fabric. Based on the functions, a 3D geometrical model applying to a meshing preprocessor for 3D finite element is proposed. The geometry model takes into account the existence of the space between tows, the undulation of the tow, and the actual tow cross-section shape. The internal geometry of model is from micrographs of sectioned laminates, which is helpful to define the accurate and actual 3D geometrical model. The section shape of the yarn remains unchanged along the trajectory. This model can be easily identified using three parameters measured on a real fabric. An accurate hexahedral mesh developed using these geometry model is presented. This is an important point for 3D finite element simulation of fabric model, which is a powerful method to investigate the mechanical behavior and also the composites made from it.

scholarly journals Study of longitudinal oscillations of a five-storey building on the basis of plate continuum model

2019 ◽  
Vol 97 ◽  
pp. 04065 ◽  
Author(s):  
Javlon Yarashov ◽  
Makhamatali Usarov ◽  
Gayratjon Ayubov
Keyword(s):  
Finite Element ◽  
Continuum Model ◽  
Anisotropic Plate ◽  
Element Model ◽  
Plate Model ◽  
Theory Of Plates ◽  
Seismic Oscillations ◽  
Moduli Of Elasticity ◽  
Storey Building ◽  
The Continuum

Continuum plate model in the form of a cantilever anisotropic plate developed in the framework of the bimoment theory of plates describing seismic oscillations of buildings is proposed in this paper as a dynamic model of a building. Formulas for the reduced moduli of elasticity, shear and density of the plate model of a building are given. Longitudinal oscillations of a building are studied using the continuum plate and box-like models of the building with Finite Element Model. Numerical results are obtained in the form of graphs, followed by their analysis.

Analysis of woven fabric behavior under punching force

2021 ◽  
pp. 152808372110086
Author(s):  
Magdi El Messiry ◽  
Eman Eltahan
Keyword(s):  
Tensile Strength ◽  
Failure Modes ◽  
Woven Fabric ◽  
Insignificant Change ◽  
Plain Weave ◽  
Factors Influencing ◽  
Failure Energy ◽  
Constant Rate ◽  
Protective Fabrics ◽  
Force Displacement

In several applications, the industrial and protective fabrics might be subjected to punching by the rigid sharp spikes. Fabric resistance to the penetration of the puncher at a constant rate was studied. The analysis of the factors influencing the resistance of the fabric and an explanation of the puncture mechanism were generated. Punching force-displacement curves were obtained and four noticeable fabric failure modes were observed. A special setup was designed so that the fabric sample can be subjected to the biaxial stresses during the puncture tests. This paper studies the puncture behaviors of the plain, twill 1/3, and twill 2/2 woven fabric designs. It was found that the increase in the number of fabric layers from one to three and the number of picks/cm from 17.6 to 27.2 would elevate the punching resistance and the punching energy by 354% and 333%, respectively, with the insignificant change in the values of specific punching force and energy. Plain weave design proved to have higher values than twill design. A high correlation was observed between fabric tensile strength, fabric Young’s modulus, fabric failure energy and its punching force and punching energy.

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

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.

Finite element analysis of mechanical properties of woven composites through a micromechanics model

2017 ◽  
Vol 24 (1) ◽  
pp. 87-99 ◽  
Author(s):  
Haris A. Khan ◽  
Abid Hassan ◽  
M.B. Saeed ◽  
Farrukh Mazhar ◽  
Imran A. Chaudhary
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Geometric Parameters ◽  
Woven Fabric ◽  
Woven Composites ◽  
Element Analysis ◽  
Micromechanics Model ◽  
Plain Weave ◽  
Fabric Composite

AbstractIn a woven fabric composite, arrangement and behavior of the fibers contained in the yarn and the yarns themselves lead to an intricate deformation mechanism. The current research, therefore, intends to propose a simplified mathematical micromechanics model for calculating mechanical properties of the plain weave composite using finite element analysis (FEA). A repetitive volume element (RVE) cell approach has been adopted for properties evaluation of plain weave composites. The FEA allows the modeling and portrayal of fabrics by taking into account various geometric parameters such as the yarn undulation, the probability of existence of consonances in a unit cell and interaction between warp and fill tows. These factors help in generating a mesh close to the actual fabric/composite. Additionally, a technique to represent the internal layout of composite structure employing actual dimensions of yarn geometry using conventional measurement devices, rather than using the demanding method of obtaining measurements from photomicrographs of sectioned laminates, is also proposed. The geometric symmetries as reported in the available literature were also incorporated during the model formulation. The theory of comparative displacements was then used to construe these symmetries into appropriate mechanical terms. Consequently, this leads to the formulation of boundary conditions for the RVE. The proposed finite element micromechanics model is different from the existing models in a way that it defines the yarn cross-sectional path based upon computational fluid dynamics technique rather than conventionally obtained photomicrographic results or the proposed sinusoidal paths by various researchers. Experiments were then performed on the laminates used for obtaining the geometric parameters with the aim of supporting the validity of the suggested model. The results of computational analysis were found to be in good agreement with the outcomes of experimental investigation.

scholarly journals 2D woven/ 3D orthogonal Woven Non-crimp E-glass Fabric as Reinforcement in Epoxy Composites using Vacuum Assisted Resin Infusion Molding

2017 ◽  
Vol 12 (2) ◽  
pp. 155892501701200 ◽  
Author(s):  
Suhas Yeshwant Nayak ◽  
Srinivas Shenoy Heckadka ◽  
Ramakrishna Vikas Sadanand ◽  
Kapil Bharadwaj ◽  
Harsh Mukut Pokharna ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Woven Fabric ◽  
Epoxy Composites ◽  
Fracture Mechanisms ◽  
Resin Infusion ◽  
Plain Weave ◽  
Morphological Studies ◽  
Weave Fabric ◽  
3D Orthogonal Woven ◽  
Laminar Shear

E-glass/Epoxy composites were fabricated using Vacuum Assisted Resin Infusion Moulding (VARIM) in fiber weight fractions of 40%, 45%, 50% and 55 percent. E-glass fiber in the form of 2D plain woven fabric of 320 gsm and 3D orthogonal woven non-crimp fabric with 1830 gsm were considered for reinforcement. Mechanical properties including tensile strength, flexural strength, impact strength and inter-laminar shear strength (ILSS) of both the composites were evaluated and compared to explore the possibility of 3D fabric as an alternative over the plain weave fabric. Improvement in mechanical properties was seen with increase in fiber content in both the composites. Results support the view that 3D orthogonal weave fabric can be used in lieu of plain weave fabric as it exhibited improved mechanical properties. Morphological studies were used to analyze the fracture mechanisms.

Sign in / Sign up

Export Citation Format

Share Document