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AIP Conference Proceedings [AIP Publishing PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019 - Tomsk, Russia (1–5 October 2019)] PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019 - Complex experimental approach to carbon-carbon composite defect detection by laser vibrometry and optical thermography
摘要： Nondestructive testing of carbon-carbon composite plate by thermal method and laser vibrometry with 12 impact damages of the same energy were carried out. Thermograms and distributions of vibrations from the plate surface at its heating and acoustic excitation are obtained. Complex diagnostics made it possible to detect all available defects by synthesizing data, as well as to increase the accuracy and informative value of quality control. It is shown that the control efficiency depends on the side of the plate selected for shooting, the type of method used to process the obtained data in the thermal control, as well as on the choice of the direction of acoustic wave movement when using laser vibrometry.
关键词： laser vibrometry,carbon-carbon composite,optical thermography,nondestructive testing,defect detection
更新于2025-09-16 10:30:52
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Studying Stability of CFRP Composites to Low-Energy Impact Damage by Laser Vibrometry
摘要： Nondestructive quality control of small-thickness composites is an important scientific and technical problem due to significant damage inflicted on materials even with minor impact loads. The stability of a 1-mm–thick CFRP composite to impact damage with an energy of up to 10 J has been investigated. Special attention has been paid to the analysis of the “visible” area of defects formed as a result of successive striking with increasing and decreasing energy in the range from 1 to 5 J. The area of defect indications was estimated by analyzing the images of vibrations at the surface of the composite produced by its acoustic stimulation and laser vibroscanning.
关键词： scanning laser vibrometry,nondestructive testing,impact damage,CFRP composite materials
更新于2025-09-12 10:27:22