Damage detection of three-dimensional braided composite materials using carbon nanotube thread

2017 ◽  
Vol 24 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Zhenkai Wan ◽  
Jianmin Guo ◽  
Minrui Jia
Keyword(s):  
Carbon Nanotube ◽  
Damage Detection ◽  
Electrical Resistance ◽  
Early Stage ◽  
Three Dimensional ◽  
Effective Solution ◽  
Strain Sensing ◽  
Braided Composite ◽  
Behavior Monitoring ◽  
Surface Method

AbstractStructural health monitoring (SHM) takes advantage of the recent advances in structural behavior monitoring to assess the performance of a structure, identifying the damage in the early stage. In this study, a carbon nanotube thread strain sensor was fabricated into a three-dimensional (3D) braided composite preform for the strain sensing of SHM. We present the results of an investigation on a carbon nanotube thread network in 3D composites for damage detection, in which the variation of the electrical resistance of the carbon nanotube thread embedded into 3D composites was recorded. Based on the variation of the electrical resistance, the location and size of damages were estimated by the response surface method, providing an effective solution for the estimation of the location and size of damages in 3D composites.

Structural Health Monitoring (SHM) of Three-Dimensional Braided Composite Material using Carbon Nanotube Thread Sensors

2013 ◽  
Vol 29 (4) ◽  
pp. 617-621 ◽  
Author(s):  
Z. Wan ◽  
J. D. Li ◽  
M. Jia ◽  
J. L. Li
Keyword(s):  
Composite Material ◽  
Carbon Nanotube ◽  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Smart Materials ◽  
Early Stage ◽  
Three Dimensional ◽  
Braided Composite ◽  
Structural Health ◽  
Smart Composite Materials

ABSTRACTStructural Health Monitoring (SHM) takes advantage of the recent advances in nanotechnology and sensing in order to monitor the behavior of a structure, assess its performance and identify damage at an early stage. Monitoring the state of strain throughout an entire structure is essential to determine its state of stress, detect potential residual stresses after fabrication, and also to help to establish its integrity. The Carbon nanotube thread was integrated into three-dimensional braiding materials and used for the first time as a sensor to monitor strain and also to detect damage in the three-dimensional braided composite material.In this paper a literature review about the application of carbon nanotubes thread for sensors and smart materials used for SHM of braiding structures is presented. The test data show the braided angle is important parameter for structural health monitoring of three-dimensional. The research will provide a new integrated and distributed technologies for the built-in carbon nanotube sensor to detect the health of composite. The subject will provide the new idea and method for the development of smart composite materials research and application.

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.

scholarly journals Strain Sensing in Polymer/Carbon Nanotube Composites by Electrical Resistance Measurement

2012 ◽  
Vol 47 ◽  
pp. 774-777 ◽  
Author(s):  
G. Georgousis ◽  
C. Pandis ◽  
A. Kalamiotis ◽  
P. Georgiopoulos ◽  
A. Kyritsis ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrical Resistance ◽  
Resistance Measurement ◽  
Electrical Resistance Measurement ◽  
Strain Sensing ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

scholarly journals Early-Stage Damage Detection in Advanced Multifunctional Aerospace Composites Using Embedded Carbon Nanotubes and Flocked Carbon Fibers

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 490
Author(s):  
Latha Nataraj ◽  
Michael Coatney ◽  
Asha Hall ◽  
Mulugeta Haile ◽  
Riley Sherman ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Damage Detection ◽  
Carbon Fibers ◽  
Early Stage ◽  
Matrix Material ◽  
Three Dimensional ◽  
Conductive Network ◽  
The Matrix ◽  
And Performance ◽  
Damage Tolerant

Early-stage damage detection could provide better reliability and performance and a longer lifetime of materials while reducing maintenance time of a variety of structures and systems. We investigate the early-stage damage formation and damage evolution in advanced multi-functional laminated aerospace composites embedded with a very small amount of carbon nanotubes (CNTs) in the matrix material and short carbon fibers along the Z-direction to reinforce the interlaminar interfaces. The three-dimensional (3-D) conductive network formed by the CNTs and the flocked carbon fibers allows for sensitive in-situ damage detection in materials in addition to providing improved mechanical properties such as superior fracture toughness for damage tolerance. We optimize several parameters such as fiber length, diameter, and density to generate an effective 3-D electrical conductive network, and characterize the responses of these composites under mechanical loading to investigate damage formation and evolution, advancing science and technology towards superior damage-tolerant and zero-maintenance structural materials.

scholarly journals Development of Hybrid Braided Composite Rods for Reinforcement and Health Monitoring of Structures

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Sohel Rana ◽  
Emilija Zdraveva ◽  
Cristiana Pereira ◽  
Raul Fangueiro ◽  
A. Gomes Correia
Keyword(s):  
Carbon Fibre ◽  
Glass Fibre ◽  
Electrical Resistance ◽  
Mechanical Performance ◽  
Positive Response ◽  
Gauge Factor ◽  
Strain Sensitivity ◽  
Strain Sensing ◽  
Fibre Glass ◽  
Braided Composite

In the present study, core-reinforced braided composite rods (BCRs) were developed and characterized for strain sensing capability. A mixture of carbon and glass fibre was used in the core, which was surrounded by a braided cover of polyester fibres. Three compositions of core with different carbon fibre/glass fibre weight ratios (23/77, 47/53, and 100/0) were studied to find out the optimum composition for both strain sensitivity and mechanical performance. The influence of carbon fibre positioning in BCR cross-section on the strain sensing behaviour was also investigated. Strain sensing property of BCRs was characterized by measuring the change in electrical resistance with flexural strain. It was observed that BCRs exhibited increase (positive response) or decrease (negative response) in electrical resistance depending on carbon fibre positioning. The BCR with lowest amount of carbon fibre was found to give the best strain sensitivity as well as the highest tensile strength and breaking extension. The developed BCRs showed reversible strain sensing behaviour under cyclic flexural loading with a maximum gauge factor of 23.4 at very low strain level (0.55%). Concrete beams reinforced with the optimum BCR (23/77) also exhibited strain sensing under cyclic flexural strain, although the piezoresistive behaviour in this case was irreversible.

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.

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