Carbon fibre is a very durable and flexible product that is used in a wide range of industries. However, just because it is very strong, does not mean that it is not susceptible to defects. Carbon fibre defects stem from issues such as stress or manufacturing faults. Thankfully, there are various NDT methods that can be used to detect these defects to ensure the carbon fibre is in ideal condition for use. Enhance your understanding of the NDT methods used on carbon fibre below:
The most common method of NDT used for various products is visual inspection. This method allows us to find defects that are visible to the eye without having to use too many resources. Unfortunately, many of the defects found in carbon fibre are well hidden, requiring the use of other methods to be uncovered.
Ultrasonic testing is an NDT technique that can be used to inspect carbon fibre for defects. It is highly effective in finding defects such as porosity or variations in wall thickness. The most reliable results from ultrasonic testing come from a variation of this testing method known as phased array ultrasonic testing.
Eddy current testing
While eddy current testing is not the most suitable NDT method for testing carbon fibre due to the low conductivity of the material, it can still be used. Eddy current testing is an effective means of testing for any surface and subsurface defects; however, other NDT methods are generally used before this one.
Another NDT method that can be used to test Carbon Fibre for defects is Radiographic testing. This method is suitable as it provides high resolution, uncovering even the smallest defects. The downfall to this method is that it can be time consuming and slightly expensive.