scholarly journals Strain-Sensing Characteristics of Carbon Nanotube Yarns Embedded in Three-Dimensional Braided Composites under Cyclic Loading

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Huixiao Bai ◽  
Gang Ding ◽  
Shusheng Jia ◽  
Jinguo Hao
Keyword(s):  
Carbon Nanotube ◽  
Cyclic Loading ◽  
Damage Accumulation ◽  
Three Dimensional ◽  
Progressive Damage ◽  
Strain Sensing ◽  
Braided Composites ◽  
3D Braided Composites ◽  
Sensing Characteristics ◽  
Carbon Nanotube Yarns

Carbon nanotube yarns are embedded in three-dimensional (3D) braided composites with five-axis yarns, which are used as strain sensors to monitor the damage of 3D braided composites. In the cyclic mechanical loading experiment, the strain-sensing characteristics of 3D braided composites were studied by in situ measuring the resistance change of the embedded carbon nanotube yarn. The 3D five-directional braided composite prefabricated part based on carbon nanotube yarns was developed, and the progressive damage accumulation experiments were carried out on carbon nanotube yarns and specimens embedded in carbon nanotube yarns. The research results show that there is a good correlation between the change of relative resistance of the carbon nanotube yarn and the strain of the composite specimen during cyclic loading and unloading. When the tensile degree of the specimen increases beyond a certain range, the carbon nanotube yarn sensor embedded in the specimen shows resistance hysteresis and produces residual resistance. Therefore, the fiber can better monitor the progressive damage accumulation of 3D five-direction braided composites.

Characteristic analysis of carbon nanotube thread embedded into three-dimensional braided composite under bending load

2017 ◽  
Vol 24 (5) ◽  
pp. 791-798 ◽  
Author(s):  
Jian-Min Guo ◽  
Li-Ying Gong ◽  
Yan Liu
Keyword(s):  
Carbon Nanotube ◽  
Compressive Loading ◽  
Three Dimensional ◽  
Strain Sensing ◽  
Braided Composites ◽  
Characteristic Analysis ◽  
Resistance Change ◽  
Braided Composite ◽  
Bending Load ◽  
Embedded Method

AbstractIn this paper, we introduce an embedded method of carbon nanotube threads (CNTs) in three-dimensional (3-D) braided composite material preform. We investigate the strain sensing properties of CNTs embedded into 3-D braided composites using three-point bend test under different loads. The resistance change rate properties of CNTs in composites under tensile and compressive loading are analyzed in detail. Experimental results show that in the three-point bending process, the resistance of CNTs exponentially increases with the increase of strain until the specimen loading to fracture. Moreover, the residual resistance of CNTs has been observed after unloading. Our experiments have shown that structure health status of 3-D braided composites can be sensed and monitored in real-time using CNTs sensor under bending load. This study provides an experimental basis to lay the foundation for the structural health monitoring system construction of 3-D braided composites.

Research on Fabricating Technology of Three Dimensional Integrated Braided Composite I Beam

2010 ◽  
Vol 136 ◽  
pp. 59-63 ◽  
Author(s):  
X.Y. Pei ◽  
Jia Lu Li
Keyword(s):  
Cross Section ◽  
High Performance ◽  
Research Result ◽  
Three Dimensional ◽  
Void Content ◽  
Braided Composites ◽  
Braided Composite ◽  
Transfer Molding ◽  
3D Braided Composites

In this paper the fabricating technology of three dimensional (3D) integrated braided composite I beam is researched, including: braiding technology of 3D braided I beam preform, the orientation of fiber-tow in the I beam preform, the optimizing of process parameters of resin transfer molding (RTM) for 3D braided composite I beam, and the design of mould for consolidation of composite I beam. The quality of 3D braided composites is good analyzed by ultrasonic A-scan, void content calculation and microscope observation. The research result will provide a good way for designing and fabricating high performance 3D integrated braided composite components with irregular cross section.

An analytical constitutive model for progressive damage analysis of three-dimensional braided composites

2017 ◽  
Vol 39 (11) ◽  
pp. 4188-4204 ◽  
Author(s):  
Ziyang Tian ◽  
Ying Yan ◽  
Jinxin Ye ◽  
Yang Hong ◽  
Xin Li
Keyword(s):  
Constitutive Model ◽  
Three Dimensional ◽  
Progressive Damage ◽  
Damage Analysis ◽  
Braided Composites

Bearing Abilities and Progressive Damage Analysis of Three Dimensional Four-Directional Braided Composites with Cut-Edge

2016 ◽  
Vol 23 (4) ◽  
pp. 839-856 ◽  
Author(s):  
Bing Lei ◽  
Zhenguo Liu ◽  
Jixuan Ya ◽  
Yibo Wang ◽  
Xiaokang Li
Keyword(s):  
Three Dimensional ◽  
Progressive Damage ◽  
Damage Analysis ◽  
Braided Composites ◽  
Cut Edge

scholarly journals Electric Conductivity and Piezoresistivity of Carbon Nanotube Artificial Skin Based on the Design of Mesh Structure

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Xin Ma ◽  
Wen Li ◽  
Liting Wang ◽  
Xiaona Cao
Keyword(s):  
Carbon Nanotube ◽  
Electric Conductivity ◽  
Artificial Skin ◽  
Intelligent Robot ◽  
Piezoresistive Effect ◽  
Mesh Structure ◽  
Mesh Model ◽  
Sensing Technology ◽  
Sensing Characteristics ◽  
Carbon Nanotube Yarns

This paper introduces a new method of sensing pressure by using carbon nanotube yarns which are embedded in artificial skin, based on the design of the mesh structure. With the sensing technology, a kind of mesh model has been established for piezoresistive effect detection of carbon nanotube yarns in artificial skin. By analyzing the sensing characteristics of carbon nanotube yarns, we can conclude that the artificial skin embedded with yarns in a mesh model could be used for sensing pressure. It may cover the surface of the robot and has significant theoretical as well as practical value for intelligent robot research in the future.

Algorithm Design of Four-Step Three-Dimensional Braided Composite Structures in Matlab Environment

2013 ◽  
Vol 365-366 ◽  
pp. 1144-1147
Author(s):  
Chao Deng ◽  
Jian Jun Jiang ◽  
Liang Chao Fang
Keyword(s):  
Composite Structures ◽  
Algorithm Design ◽  
Three Dimensional ◽  
The Internet ◽  
3D Display ◽  
Braided Composites ◽  
Design Quality ◽  
3D Braided Composites ◽  
Geometric Simulation ◽  
Moving Process

For solving the problem of the geometric simulation of 3D braided composites, taking four-step rectangular 3D braided fabrics as an example, and based on the analysis of yarn moving regulation, the mathematical models between the braiding technique parameters and the geometric structures is established. By taking UG as the 3D display platform and MATLAB as the control core, 3D geometric simulation of the pre-modeling entity is realized. Such a simulation enables the users to observe the braid spatial structure and braiding moving process intuitively and modify them dynamically on the Internet. With this method, the design quality and efficiency of products will be raised remarkably.

Damage characterization of 3D braided composites using carbon nanotube-based in situ sensing

2010 ◽  
Vol 41 (10) ◽  
pp. 1531-1537 ◽  
Author(s):  
Kyoung Ju Kim ◽  
Woong-Ryeol Yu ◽  
Joon Seok Lee ◽  
Limin Gao ◽  
Erik T. Thostenson ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Braided Composites ◽  
3D Braided Composites ◽  
Damage Characterization ◽  
In Situ Sensing

A computational approach with surface-based cohesive contact for meso-scale interface damage simulation in 3D braided composites

2020 ◽  
pp. 152808372098017
Author(s):  
Chao Zhang ◽  
Jianchun Liu ◽  
Tinh Quoc Bui ◽  
Jose L Curiel-Sosa ◽  
Jinzhong Lu
Keyword(s):  
Damage Evolution ◽  
Textile Composites ◽  
Interface Debonding ◽  
Progressive Damage ◽  
Fe Model ◽  
Matrix Interface ◽  
Braided Composites ◽  
3D Braided Composites ◽  
Damage Simulation ◽  
Meso Scale

The yarn/yarn and yarn/matrix interface debonding has been recognized as a vital failure mode of 3 D braided composites. We present in this paper a meso-scale finite element (FE) model, which considers yarn/yarn and yarn/matrix interface debonding, for modeling progressive damage evolution of 3 D braided composites under typical tensile and shear loadings. In this setting, the damage state of braiding yarns and matrix is described through a continuum damage model (CDM) coupled with Murakami damage tensor; a bilinear traction-separation description is employed to govern the yarn/yarn and yarn/matrix interface behavior modeled by surface-based cohesive contact. We thus develop a user-material subroutine VUMAT (ABAQUS/Explicit) for our progressive damage simulation, including stress analysis, failure analysis and material properties degradation scheme. The mechanical properties of 3 D braided composites, and more importantly the damage evolution of interface debonding are thoroughly analyzed. The proposed FE modeling strategy provides a new perspective for the interface response study of other textile composites.

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