Non-destructive testing of carbon-fibre-reinforced polymer materials with a radio-frequency inductive sensor

2015 ◽  
Vol 122 ◽  
pp. 104-112 ◽  
Author(s):  
Bartlomiej Salski ◽  
Wojciech Gwarek ◽  
Przemyslaw Korpas ◽  
Szymon Reszewicz ◽  
Alvin Y.B. Chong ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Radio Frequency ◽  
Polymer Materials ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Inductive Sensor ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Non Destructive

scholarly journals A Review of the Radio Frequency Non-destructive Testing for Carbon-fibre Composites

2016 ◽  
Vol 16 (2) ◽  
pp. 68-76 ◽  
Author(s):  
Zhen Li ◽  
Zhaozong Meng
Keyword(s):  
Carbon Fibre ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Ultra Wideband ◽  
Electromagnetic Properties ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Cfrp Composites ◽  
Carbon Fibre Composites ◽  
Non Destructive

AbstractThe purpose of this paper is to review recent research on the applications of existing non-destructive testing (NDT) techniques, especially radio frequency (RF) NDT, for carbon-fibre reinforced plastics (CFRP) composites. Electromagnetic properties of CFRP composites that are associated with RF NDT are discussed first. The anisotropic characteristic of the conductivity and the relationship between the penetration depth and conductivity should be paid much attention. Then, the well-established RF NDT including eddy current technique, microwave technique and RF-based thermography are well categorised into four types (i.e. electromagnetic induction, resonance, RF-based thermography and RF wave propagation) and demonstrated in detail. The example of impact damage detection using the induction and resonance methods is given. Some discussions on the development (like industrial-scale automated scanning, three-dimensional imaging, short-range ultra-wideband (UWB) imaging and the radio frequency identification technology (RFID)-based NDT) are presented.

Non-Destructive Testing of Carbon Fibre Reinforced Polymer (CFRP) Composite Using Thermosonic Technique

2020 ◽  
pp. 348-365
Author(s):  
Tanmoy Bose ◽  
N. S. V. N. Hanuman ◽  
Subhankar Roy
Keyword(s):  
Carbon Fibre ◽  
Local Defect ◽  
Low Velocity ◽  
Destructive Testing ◽  
Flat Bottom ◽  
Reinforced Polymer ◽  
Cfrp Plate ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Thermal Signature

Composite materials are often subjected to low velocity impacts which leads to delamination in subsequent layers. Linear ultrasound-based approaches are not accurate enough to detect it properly. The local defect resonance (LDR) based thermosonic is proved to be an efficient candidate for detection of such defects. LDR frequency excitation leads to high amplitude vibration which raises defect temperature drastically, detectable by an infrared camera. In this chapter, a numerical investigation of LDR frequency excited ultrasound thermography is carried out on delaminated carbon fibre reinforced polymer (CFRP) plate. The location and size of the delamination can be easily understood from thermal signature. The temperature gradient variation is found to be high at first and then it decreases due to higher heat conduction rate. The delamination in CFRP plate is detected by standard phased array ultrasound testing (PAUT) using flat bottom hole in aluminium plate as a case study. Delamination detection by PAUT is found to be very time consuming process compared with thermosonic technique.

Hardware implementation of electrical resistance tomography for damage detection of carbon fibre–reinforced polymer composites

2016 ◽  
Vol 16 (2) ◽  
pp. 129-141 ◽  
Author(s):  
Jan Cagáň
Keyword(s):  
Carbon Fibre ◽  
Electrical Resistance ◽  
Composite Structures ◽  
Dynamic Range ◽  
Current Source ◽  
Polymer Materials ◽  
Electrical Resistance Tomography ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

The growing use of carbon fibre–reinforced polymer materials in aerospace and industrial applications requires the deployment of appropriate tools for detecting the occurrence and development of damage as well as for monitoring the durability of conductive composite structures. Electrical resistance tomography is a promising method in this field, since many types of fibre composite defects cause changes in the spatial distribution of conductivity. In comparison with other methods in the field of structural health monitoring, electrical resistance tomography has, at first glance, modest requirements for sensors, and thus appears to be a useful instrument in this field. Most of the previously conducted experiments in this field relied on the stand-alone hardware thereby did not contribute to a technological readiness level of the electrical resistance tomography. The article describes an experiment conducted on a carbon fibre–reinforced polymer composite specimen in laboratory conditions nevertheless with minimum usage of stand-alone equipment. Attention is focused on the first steps in the development of hardware, namely on the instrumental amplifier with active shielding and the voltage controlled current source. Experimental verification of usability of these components along with observed common mode voltage error and dynamic range is useful for next development of more complicated device such as a multiplexer. Greater attention is also paid to the implementation of electrodes, as these are a key part. The main contributions of proposed work lie in the usability verification of the key hardware components with the help of basic image reconstruction of the real damage.

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