Study On High-Resolution Tomography For Terahertz Testing Of Composite Materials
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Abstract
Composite materials have found extensive applications in aerospace and other fields. Nevertheless, within these materials, invisible defects such as bubbles (air delamination), holes, and inclusions often emerge. These defects not only degrade the material’s performance but also pose significant safety hazards. As a result, it becomes essential to employ nondestructive testing (ndt) technology to detect and assess damage in composite materials. Currently, terahertz (thz) imaging has garnered substantial attention on account of its remarkable penetration ability and high resolution. In this paper, we propose a high-resolution tomography method based on thz time-domain spectroscopy technology. This method is applied for the first time to detect the actual and unknown defects in glass fiber pipes and foam core products, aiming to verify its effectiveness and practicality. The proposed method has achieved notable success in detecting genuine bubble and hole defects that elude detection by ultrasonic c-scan imaging, which is commonly used in industrial testing.
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Research context
OpenAlex topics: Terahertz technology and applications · Thermography and Photoacoustic Techniques · Photonic and Optical Devices
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References (48)
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