scholarly journals Improved method of manufacturing carbon nanotube infused multifunctional 3D woven composites

2021 ◽  
pp. 002199832110558
Author(s):  
Prasad Shimpi ◽  
Andrey Aniskevich ◽  
Daiva Zeleniakiene
Keyword(s):  
Research Work ◽  
Three Dimensional ◽  
Vacuum Pressure ◽  
Glass Fabric ◽  
Woven Composites ◽  
Multifunctional Composites ◽  
Smart Composites ◽  
3D Woven Composites ◽  
Filtering Effect ◽  
Transfer Moulding

This research work aimed to develop smart multifunctional composites via a process for uniformly dispersing carbon nanotubes (CNT) on an orthogonal three-dimensional (3D) woven glass fabric with minimised filtering effect. These smart composites could detect strain under tensile and flexural loading by the piezoresistive response of the infused CNT network. Conventional vacuum assisted resin transfer moulding was modified to control the infusion of 0.25 wt% CNT on the 3D woven glass fabric by varying the vacuum pressure. Results showed that at 101.3 kPa vacuum pressure, the CNT percolated through the thickness of the orthogonal 3D woven glass fabric while being marginally filtered by the fibres and were suitable for sensing tensile strain, whereas at 30.4 kPa, the CNT were deposited only on the surface of the fabric preform without getting filtered and were suitable for sensing flexural strain.

Tensile properties of defect-prefabricated 3D woven composites: Experiments and simulations

2021 ◽  
pp. 152808372110395
Author(s):  
Liming Xu ◽  
Deng’an Cai ◽  
Chao Li ◽  
Xingyu Jin ◽  
Guangming Zhou
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Research Work ◽  
Three Dimensional ◽  
Woven Composites ◽  
Structural Components ◽  
Damage Models ◽  
3D Woven Composites ◽  
Near Net Shape ◽  
Von Mises

Three-dimensional (3D) woven composites have been widely used in structural components due to their excellent mechanical and near-net-shape properties. However, for some special applications, it is expected that 3D woven composites can be damaged at designated locations under a specific load. In this research work, a new kind of defect-prefabricated 3D woven composites (DP3DWCs) are designed, where defects are prefabricated by cutting weft or warp yarns in defect-free 3D woven composites (DF3DWCs). The tensile mechanical properties of the DF3DWCs and the DP3DWCs are investigated experimentally and numerically. The mesoscopic geometry models of the DF3DWCs and the DP3DWCs were established by multi-objective searching algorithm. The progressive damage models were established using the 3D Hashin criteria and the von Mises failure criterion. Numerical results agree well with the experimental data. The influence of the number of defect layers on the mechanical properties was also discussed. The obtained results indicate that the defects have little effect on the elastic modulus, while tensile strengths decrease linearly with the increase of the number of defect layers. Failure mechanisms of yarns and matrix in the non-defective and defective materials were studied, and the volume fraction of elements of each failure mode was computed and analysed.

Comparison of Two Approaches to Model Cure-Induced Microcracking in Three-Dimensional Woven Composites

2012 ◽  
Author(s):  
Igor Tsukrov ◽  
Michael Giovinazzo ◽  
Kateryna Vyshenska ◽  
Harun Bayraktar ◽  
Jon Goering ◽  
...  
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Volume Fraction ◽  
Three Dimensional ◽  
Woven Composites ◽  
Finite Element Models ◽  
The Matrix ◽  
3D Woven Composites ◽  
The Difference ◽  
Resin Curing

Finite element models of 3D woven composites are developed to predict possible microcracking of the matrix during curing. A specific ply-to-ply weave architecture for carbon fiber reinforced epoxy is chosen as a benchmark case. Two approaches to defining the geometry of reinforcement are considered. One is based on the nominal description of composite, and the second involves fabric mechanics simulations. Finite element models utilizing these approaches are used to calculate the overall elastic properties of the composite, and predict residual stresses due to resin curing. It is shown that for the same volume fraction of reinforcement, the difference in the predicted overall in-plane stiffness is on the order of 10%. Numerical model utilizing the fabric mechanics simulations predicts lower level of residual stresses due to curing, as compared to nominal geometry models.

Multi-scale modelling of the damage behavior for 3D woven composites with variant structure

2021 ◽  
pp. 152808372110238
Author(s):  
Hua Zhong ◽  
Shuzi Yang
Keyword(s):  
Mechanical Response ◽  
Damage Model ◽  
Three Dimensional ◽  
Tensile Modulus ◽  
Woven Composites ◽  
Scale Model ◽  
Multi Scale ◽  
Macro Scale ◽  
3D Woven Composites ◽  
Variant Structure

In the process of fabricating a three-dimensional (3 D) woven perform, the variant structures introduced during adding and reducing tows, lead to changes of local tow orientation and woven pattern, which affects the mechanical response of 3 D woven composite. In this study, specimens with variant structure were manufactured by adding and reducing tow techniques, and representative unit cells of normal and variant structure were established by topological method. A multi-scale damage model was proposed to analyze the damage behaviors and predict the strength of 3 D woven composites with the user subroutine UMAT of ABAQUS/Standard. The results show that the variation of tensile modulus and strength between the experimental and simulation value were less than 4%. In addition, it is proved that the damage propagation of the macro-scale model with variant structure can be successfully captured.

scholarly journals Multiscale Analysis of Mechanical Properties of 3D Orthogonal Woven Composites with Randomly Distributed Voids

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5247
Author(s):  
Yaohua Gong ◽  
Tao Huang ◽  
Xun’an Zhang ◽  
Yongyong Suo ◽  
Purong Jia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Multiscale Analysis ◽  
Three Dimensional ◽  
Woven Composites ◽  
Manufacturing Processes ◽  
Design Basis ◽  
Void Defects ◽  
3D Woven Composites ◽  
3D Orthogonal Woven

Voids are common defects in 3D woven composites because of the complicated manufacturing processes of the composites. In this study, a micro–meso multiscale analysis was conducted to evaluate the influence of voids on the mechanical properties of three-dimensional orthogonal woven composites. Statistical analysis was implemented to calculate the outputs of models under the different scales. A method is proposed to generate the reasonable mechanical properties of the microscale models considering randomly distributed voids and fiber filaments. The distributions of the generated properties agree well with the calculated results. These properties were utilized as inputs for the mesoscale models, in which void defects were also considered. The effects of these defects were calculated and investigated. The results indicate that tensile and shear strengths were more sensitive to the microscale voids, while the compressive strength was more influenced by mesoscale voids. The results of this study can provide a design basis for evaluating the quality of 3D woven composites with void defects.

Structural influences of two-dimensional and three-dimensional carbon/epoxy composites on mode I fracture toughness behaviors with rate effects on damage evolution

2018 ◽  
Vol 50 (1) ◽  
pp. 23-45 ◽  
Author(s):  
Amna Siddique ◽  
Baozhong Sun ◽  
Bohong Gu
Keyword(s):  
Fracture Toughness ◽  
Three Dimensional ◽  
Woven Composites ◽  
High Fracture Toughness ◽  
Fracture Mechanisms ◽  
Mode I ◽  
Two Dimensional ◽  
Woven Composite ◽  
High Fracture ◽  
3D Woven Composites

This paper reports the mode I interlaminar fracture toughness and fracture mechanisms of two-dimensional (2D) plain woven composite and three-dimensional (3D) angle-interlock woven composite. The fracture toughness behaviors were tested with double cantilever beam method at the different loading rates from 0.5 to 100 mm/min. Critical strain energy release rate was calculated to compare the difference between the 2D and the 3D woven composites. The fractographs were photographed with scanned electronic microscopy and optical microscopy to show the fracture morphologies. We found that the 3D angle-interlock woven composite has high fracture toughness than that of 2D woven composite. The binder yarns resist the crack initiation and propagation to increase the fracture toughness. While the lower in-plane stiffness of the 3D woven composites should be considered fully for designing the 3D woven composites.

Bending Property of Honeycombed 3D Woven Composites with Quadrilateral Cross Section

2020 ◽  
Vol 7 (2) ◽  
pp. 7-12
Author(s):  
Lihua Lyu ◽  
Liming Zhu ◽  
Jingrui Cui ◽  
Jing Guo ◽  
Fang Ye
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Cross Section ◽  
Three Dimensional ◽  
Honeycomb Structure ◽  
Woven Composites ◽  
Molding Process ◽  
Element Simulation ◽  
Bending Load ◽  
3D Woven Composites

The delamination resistance and damage tolerance of traditional honeycomb composites are poor. To overcome these defects, 3D (three-dimensional) integrated woven composites of honeycomb structure were designed, and then manufactured using the vacuum assisted resin transfer molding process (VARTM), based on the 3D self-prepared fabrics used as reinforcements. The load-displacement curves, maximum bending load-velocity curves, and bar chart of energy absorption were determined experimentally and calculated by finite element simulation. The results showed good agreement between experimental and finite element simulation data. The correctness of the model was verified, so the model can be used to predict the mechanical properties of 3D integrated woven composites of honeycomb structure with quadrilateral cross section.

A Comparative Study on Interlaminar Properties of L-shaped Two-Dimensional (2D) and Three-Dimensional (3D) Woven Composites

2019 ◽  
Vol 26 (3) ◽  
pp. 723-744 ◽  
Author(s):  
Qiaole Hu ◽  
Yihui Zhang ◽  
Yanyun Mao ◽  
Hafeezullah Memon ◽  
Yiping Qiu ◽  
...  
Keyword(s):  
Comparative Study ◽  
Three Dimensional ◽  
Woven Composites ◽  
Two Dimensional ◽  
3D Woven Composites

On the Understanding of Tensile Elastic and Strength Properties of Integrally Woven 3D Carbon Composites

2002 ◽  
Author(s):  
Larry C. Dickinson ◽  
Alexander E. Bogdanovich
Keyword(s):  
Three Dimensional ◽  
Theoretical Work ◽  
Strength Properties ◽  
Textile Composites ◽  
Woven Composites ◽  
Carbon Composites ◽  
Significant Difference ◽  
3D Woven Composites ◽  
The Difference ◽  
3D Orthogonal Woven

There is significant literature reporting research on three-dimensional (3D) textile composites. Previous experimental and theoretical work has shown that small details of design and structure of 3D woven composites have a significant effect on strength and failure mechanisms. This work presents the results of an experimental study examining the effect of thickness (number of warp layers) on tensile behavior of 3D orthogonal woven carbon/epoxy composites. Three different preform designs resulting in three different thicknesses were examined. There is a significant difference between warp (x) and fill (y) tensile properties strength, and the difference is a function of thickness.

Numerical study of multi-dimensional hyperbolic telegraph equations arising in nuclear material science via an efficient local meshless method

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Imtiaz Ahmad ◽  
Aly R. Seadawy ◽  
Hijaz Ahmad ◽  
Phatiphat Thounthong ◽  
Fuzhang Wang
Keyword(s):  
Meshless Method ◽  
Material Science ◽  
Numerical Study ◽  
Research Work ◽  
Time Integration ◽  
Three Dimensional ◽  
Nuclear Material ◽  
Telegraph Equations ◽  
Model Equations ◽  
Derivatives Of

Abstract This research work is to study the numerical solution of three-dimensional second-order hyperbolic telegraph equations using an efficient local meshless method based on radial basis function (RBF). The model equations are used in nuclear material science and in the modeling of vibrations of structures. The explicit time integration technique is utilized to semi-discretize the model in the time direction whereas the space derivatives of the model are discretized by the proposed local meshless procedure based on multiquadric RBF. Numerical experiments are performed with the proposed numerical scheme for rectangular and non-rectangular computational domains. The proposed method solutions are converging quickly in comparison with the different existing numerical methods in the recent literature.

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