Effect of warp and fill-fiber volume fractions on mechanical properties of glass/epoxy woven fabric composites

2020 ◽  
Vol 54 (24) ◽  
pp. 3501-3513
Author(s):  
Mohammad Aghaei ◽  
Mahmood M Shokrieh ◽  
Reza Mosalmani
Keyword(s):  
Mechanical Properties ◽  
Micromechanical Model ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Experimental Program ◽  
Fiber Volume ◽  
Volume Fractions ◽  
Woven Fabric Composites ◽  
New Concepts ◽  
Fabric Composites

Mechanical properties of woven fabric composites are influenced by fabric geometry and harness. In the present research, woven fabric composites made of ML-506 epoxy resin and E-glass woven fabrics with three different fabric geometries (harnesses of 2, 5, and 8) were studied experimentally. The new concepts of warp and fill-fiber volume fractions were introduced. Based on these new concepts, a micromechanical model for predicting the stiffness and strength of composites made of woven fabrics was developed. An experimental program was conducted to evaluate the present model and the new concepts of warp and fill-fiber volume fractions. The results obtained by the new micromechanical model have been compared with the conducted experimental results as well as the experimental data available in the literature, and very good correlations were obtained.

Thermo-Mechanical Modeling of 3D Woven Fabric Composites Using Two-Step Homogenization Approach

2019 ◽  
Author(s):  
Nagappa Siddgonde ◽  
Anup Ghosh
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Woven Fabric ◽  
Fiber Volume ◽  
Woven Fabric Composites ◽  
Fabric Composite ◽  
Fabric Composites ◽  
Matrix Properties ◽  
Homogenization Approach ◽  
3D Fea

Abstract A 3D finite element based Representative Volume Element (RVE) model has been developed to predict the thermo-mechanical properties of 3D orthogonal interlock woven fabric composites (OIWFC) and angle interlock woven fabric composite (AIWFC) using a two-step homogenization approach. The first step homogenization, micro-homogenization, deals with resin infiltration effect of yarn as a unidirectional continuous fiber with an assumption of 80 percent of fiber volume fraction based on initial fiber and matrix properties. The second step, meso-homogenization, predicts effective thermo-mechanical properties of 3D woven fabric composites based on effective yarn and matrix properties. The RVE analysis has been performed using 3D FEA method with periodic boundary conditions (PBCs). Further, a void study has been performed considering the influences of void on thermo-mechanical properties of the 3D woven fabric composite. It is noted that the influence of void contents plays a significant role in predicting the thermo-mechanical properties of the 3D WFC. The thermo-mechanical properties gradually decrease with an increase of void contents. Studies have been carried out considering the same fiber volume fractions in both 3D WFC models. An AIWFC model predicts higher values of thermo-mechanical constants than OIWFC model.

scholarly journals Structure optimization of woven fabric composites for improvement of mechanical properties using a micromechanics model of woven fabric composites and a genetic algorithm

2021 ◽  
Vol 30 ◽  
pp. 263498332110061
Author(s):  
Gunyong Hwang ◽  
Dong Hyun Kim ◽  
Myungsoo Kim
Keyword(s):  
Mechanical Properties ◽  
Genetic Algorithm ◽  
Elastic Modulus ◽  
Fiber Composite ◽  
Woven Fabric ◽  
Cross Sectional ◽  
Micromechanics Model ◽  
Woven Fabric Composites ◽  
Fabric Composites ◽  
Out Of Plane

This research aims to optimize the mechanical properties of woven fabric composites, especially the elastic modulus. A micromechanics model of woven fabric composites was used to obtain the mechanical properties of the fiber composite, and a genetic algorithm (GA) was employed for the optimization tool. The structure of the fabric fiber was expressed using the width, thickness, and wave pattern of the fiber strands in the woven fabric composites. In the GA, the chromosome string consisted of the thickness and width of the fill and warp strands, and the objective function was determined to maximize the elastic modulus of the composite. Numerical analysis showed that the longitudinal mechanical properties of the strands contributed significantly to the overall elastic modulus of the composites because the longitudinal property was notably larger than the transverse property. Therefore, to improve the in-plane elastic modulus, the resulting geometry of the composites possessed large volumes of related strands with large cross-sectional areas and small strand waviness. However, the numerical results of the out-of-plane elastic modulus generated large strand waviness, which contributed to the fiber alignment in the out-of-plane direction. The findings of this research are expected to be an excellent resource for the structural design of woven fabric composites.

scholarly journals Mechanisms of Mode I Interlaminar Fracture of Glass Woven Fabric Composites

2000 ◽  
Vol 9 (3) ◽  
pp. 096369350000900 ◽  
Author(s):  
M. Kotaki ◽  
T. Kuriyama ◽  
H. Hamada ◽  
Z. Maekawa ◽  
I. Narisawa
Keyword(s):  
Fracture Toughness ◽  
Laminated Composites ◽  
Damage Zone ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Mode I ◽  
Interlaminar Fracture ◽  
Woven Fabric Composites ◽  
Fabric Composites ◽  
Silane Concentration

Mode I interlaminar fracture behaviours were investigated on the laminated composites reinforced with plain glass woven fabrics which were treated with different silane concentrations. The low silane concentration specimen indicated higher fracture toughness, compared to the high silane concentration specimen. This is due to the occurrence of the micro crack in the fibre strands. In the low silane concentration specimen, larger damage zone due to the micro crack was formed ahead of the crack tip.

scholarly journals Fabrication and Mechanical Properties of PE/PE Woven Fabric Composites

2004 ◽  
Vol 30 (2) ◽  
pp. 71-78
Author(s):  
Yuji HIGUCHI ◽  
Tatsuro FUKUI ◽  
Asami NAKAI ◽  
Hiroyuki HAMADA
Keyword(s):  
Mechanical Properties ◽  
Woven Fabric ◽  
Woven Fabric Composites ◽  
Fabric Composites

Ballistic Impact of Dry Woven Fabric Composites: A Review

2008 ◽  
Vol 61 (1) ◽  
Author(s):  
Ala Tabiei ◽  
Gaurav Nilakantan
Keyword(s):  
Failure Modes ◽  
Experimental Testing ◽  
Woven Fabrics ◽  
Ballistic Impact ◽  
Woven Fabric ◽  
Woven Fabric Composites ◽  
Fabric Composites ◽  
Conducting Research ◽  
Work Done ◽  
Ballistic Penetration

This paper reviews the topic of ballistic impact of dry woven fabric composites. It highlights previous work done in modeling the fabrics and the theory involved. Attention is also given to experimental testing, ballistic penetration resistence, projectile characteristics, and failure modes in yarns and fabric. Concepts to further enhance the ballistic penetration resistance of woven fabrics are discussed. This paper serves as an effective source of literature for those interested in conducting research into this topic. Altogether, 176 references have been cited to allow further investigation.

A Proposal of Calculation Method for Equivalent Property of Composite Materials

2007 ◽  
Vol 334-335 ◽  
pp. 241-244
Author(s):  
Hiroaki Nakai ◽  
Hiromasa Tomioka ◽  
Tetsusei Kurashiki ◽  
Masaru Zako
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Calculation Method ◽  
Woven Fabric ◽  
Superposition Method ◽  
Woven Fabric Composites ◽  
Traditional Procedure ◽  
Fabric Composites ◽  
Equivalent Property ◽  
Good Agreement

To predict the mechanical properties of composite materials by using computer is complicated, because it is difficult to model directly by ordinary FEM. A calculation method by using the mesh superposition method and periodic boundary condition has been proposed in order to obtain the equivalent mechanical properties of composite materials easily. The numerical results by proposed method have shown good agreement with ones by the traditional procedure. The proposed method is efficient for the materials with complicated structure like woven fabric composites etc.

A lamination model for shape memory polymer/woven fabric composites

2019 ◽  
Vol 08 (02) ◽  
pp. 1950004
Author(s):  
Xiaobin Su ◽  
Xiongqi Peng
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Analysis And Design ◽  
Woven Fabric Composites ◽  
Proposed Model ◽  
Fabric Composites ◽  
Hyperelastic Model ◽  
Memory Cycle

Based on continuum mechanics and finite element method, a lamination model was developed for shape memory polymer composites (SMPCs) reinforced by woven fabrics. SMPCs were modeled as a laminated structure with woven fabric reinforcements embedded in shape memory polymers (SMPs). Thermo-responsive SMPs were defined by a 3D phenomenological model based on the phase transition approach, while woven fabric reinforcements were characterized by an anisotropic hyperelastic model. The proposed model was validated by comparing numerical results of a SMPC in the shape memory cycle of bending deformation with experimental data. Applications of the lamination model were demonstrated on numerical simulations of a tube made of SMPC in three shape memory cycles with different deformation modes. The proposed model is simple and applicable in the simulations of various shape memory cycles related to SMPCs. It also provides a theoretical foundation for the analysis and design optimization of woven fabric reinforced SMPC structures.

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