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.

scholarly journals A micromechanical model for predicting biaxial tensile moduli of plain weave fabric composites

2017 ◽  
Vol 52 (5) ◽  
pp. 333-343 ◽  
Author(s):  
JB Bai ◽  
JJ Xiong ◽  
RA Shenoi ◽  
Q Wang
Keyword(s):  
Biaxial Loading ◽  
Micromechanical Model ◽  
Woven Fabric ◽  
Curved Beams ◽  
Energy Principle ◽  
New Model ◽  
Plain Weave ◽  
Biaxial Tensile ◽  
Weave Fabric ◽  
Fabric Composites

This article presents a new micromechanical model to predict biaxial tensile moduli of plain weave fabric composites by considering the interaction between the orthogonal interlacing strands. The two orthogonal yarns in micromechanical unit cell were idealized as curved beams with a path depicted using sinusoidal shape functions. The biaxial tensile moduli of plain weave fabric composites were derived by means of the minimum total complementary potential energy principle founded on micromechanics. Biaxial tensile tests were conducted on the resin transfer molding–made EW220/5284 plain weave fabric composites at five biaxial loading ratios of 0, 1, 2, 3 and ∞ to validate the new model. Predictions from the new model were compared with experimental data. 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 composites can be predicted based only on the properties of basic woven fabric.

A general micromechanical model to predict elastic and strength properties of balanced plain weave fabric composites

2017 ◽  
Vol 51 (20) ◽  
pp. 2863-2878 ◽  
Author(s):  
MM Shokrieh ◽  
R Ghasemi ◽  
R Mosalmani
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Elastic Properties ◽  
Present Model ◽  
Micromechanical Model ◽  
Homogenization Method ◽  
Plain Weave ◽  
Weave Fabric ◽  
Fabric Composites ◽  
Out Of Plane

In the present research, a micromechanical-analytical model was developed to predict the elastic properties and strength of balanced plain weave fabric composites. In this way, a new homogenization method has been developed by using a laminate analogy method for the balanced plain weave fabric composites. The proposed homogenization method is a multi-scale homogenization procedure. This model divides the representative volume element to several sub-elements, in a way that the combination of the sub-elements can be considered as a laminated composite. To determine the mechanical properties of laminates, instead of using an iso-strain assumption, the assumptions of constant in-plane strains and constant out-of-plane stress have been considered. The applied assumptions improve the accuracy of prediction of mechanical properties of balanced plain weave fabrics composites, especially the out-of-plane elastic properties. Also, the stress analysis for prediction of strain–stress behavior and strength has been implemented in a similar manner. In addition, the nonlinear mechanical behavior of balanced plain weave composite is studied by considering the inelastic mechanical behavior of its polymeric matrix. To assess the accuracy of the present model, the results were compared with available results in the literature. The results, including of engineering constants (elastic modulus and Poisson’s ratio) and stress–strain behavior show the accuracy of the present model.

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.

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.

Measurement and Prediction of Effective Thermal Conductivity for Woven Fabric Composites

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1808-1813 ◽  
Author(s):  
Nam Seo Goo ◽  
Kyeongsik Woo
Keyword(s):  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Woven Fabric ◽  
Fiber Volume ◽  
Plain Weave ◽  
Woven Fabric Composites ◽  
Weave Fabric ◽  
Experimental Apparatus ◽  
Fabric Composites ◽  
Thermal Conductivities

The current paper deals with the measurement and prediction of thermal conductivities for plain weave fabric composites. An experimental apparatus was setup to measure the temperature gradients from which the thermal conductivities were obtained. The thermal conductivities were also calculated using finite element analyses for plain weave unit cell models and then compared with experimental results. In addition, the effect of a phase shift and the fiber volume fraction in the tow on the thermal conductivities was addressed.

scholarly journals Analysis of Plastic Deformation of Double Reduced Sheets

2016 ◽  
Vol 10 (4) ◽  
pp. 271-274
Author(s):  
Emil Spišák ◽  
Janka Majerníková ◽  
Emília Duľová Spišáková ◽  
Ľuboš Kaščák
Keyword(s):  
Plastic Deformation ◽  
Biaxial Loading ◽  
Tensile Tests ◽  
Material Testing ◽  
Final Part ◽  
Biaxial Tensile ◽  
Localization Of Plastic Deformation ◽  
Microstructure Of Material ◽  
Uniaxial And Biaxial Loading

Abstract This paper discusses the causes and the effects of plastic deformation of double reduced sheets under uniaxial and biaxial loading. It focuses on the specific inhomogeneity and localization of plastic deformation, which is analysed in detail. The uniaxial and the hydraulic biaxial tensile tests were used for material testing and the results were compared and evaluated. The final part of the paper deals with the microstructure of material deformations.

Ballistic impact performance and surface failure mechanisms of two-dimensional and three-dimensional woven p-aramid multi-layer fabrics for lightweight women ballistic vest applications

2019 ◽  
pp. 152808371986288 ◽  
Author(s):  
Mulat Alubel Abtew ◽  
François Boussu ◽  
Pascal Bruniaux ◽  
Carmen Loghin ◽  
Irina Cristian ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Surface Damage ◽  
Ballistic Impact ◽  
Woven Fabric ◽  
Target Point ◽  
Two Dimensional ◽  
Plain Weave ◽  
Number Of Layers ◽  
Weave Fabric ◽  
Target Locations

This paper investigates the influences of woven fabric type, impact locations and number of layers on ballistic impact performances of target panels through trauma dimension and panel surface damage mechanisms for lightweight women ballistic vest design. Three panels with 30, 35 and 40 layers of two-dimensional plain weave and another two panels with 30 and 40 layers of three-dimensional warp interlock fabrics were prepared. The three-dimensional woven fabric was manufactured using automatic Dornier weaving machine, whereas the two-dimensional fabric (with similar p-aramid fibre type (Twaron®)) was received from the Teijin Company. The ballistic tests were carried out according to NIJ Standard-0101.06 Level IIIA. Based on the result, woven fabric construction type, number of layers and target locations were directed an upshot on the trauma measurement values of the tested target panels. For example, 40 layers of two-dimensional plain weave fabric panels show lower trauma measurement values as compared to its counterpart three-dimensional warp interlock fabric panels with similar layer number. Moreover, 40 layers of two-dimensional fabric panels revealed 47% and 39% trauma depth reduction as compared to panels with 30 layers of two-dimensional fabric panel in moulded (target point 1) and non-moulded (target point 6), respectively. Due to higher amount of primary yarn involvement, two-dimensional plain weave fabric panel face higher level of local surface damages but less severe and fibrillated yarns than three-dimensional warp interlock fabrics panels. Moreover, three-dimensional warp interlock fabric panels required higher number of layers compared to two-dimensional plain weave aramid fabrics to halt the projectiles. Similarly, based on the post-mortem analysis of projectile, higher projectile debris deformation was recorded for panels having higher number of layers for both types of fabrics at similar target locations.

An anisotropic hyperelastic constitutive model for plain weave fabric considering biaxial tension coupling

2017 ◽  
Vol 89 (3) ◽  
pp. 434-444 ◽  
Author(s):  
Yuan Yao ◽  
Xiaoshuang Huang ◽  
Xiongqi Peng ◽  
Pengfei Liu ◽  
Gong Youkun
Keyword(s):  
Experimental Data ◽  
Constitutive Model ◽  
Coupling Effect ◽  
Biaxial Tension ◽  
Numerical Results ◽  
Material Parameter Identification ◽  
Forming Simulation ◽  
Plain Weave ◽  
Biaxial Tensile ◽  
Weave Fabric

A nonlinear anisotropic hyperelastic constitutive model is developed for plain weave fabrics by considering biaxial tensile coupling. The strain energy function is decomposed into two parts to represent tensile energy, including the biaxial tensile coupling effect from fiber elongation and shearing energy from relative rotation between warp and weft yarns. A simple and efficient material parameter identification method is proposed. The model is exemplified on a balanced plain weave glass fabric. Experimental data from the literature are used to identify material parameters in the constitutive model. Model validation is implemented by comparing numerical results with various experimental data, including biaxial tension tests under different stretch ratios and the picture frame shearing test. The developed constitutive model is applied to numerical simulation of a double-dome stamping of the plain weave fabric. The influences of binder force and initial fiber yarn orientation on forming are investigated. Numerical results demonstrated that the biaxial tensile coupling effect could not be neglected in forming simulation. The developed constitutive model is suitable to characterize the nonlinear behavior of plain weave fabrics under large deformation.

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