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1 Archives of Materials Science and Engineering

1 2008

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Active IR-thermography as a method of fiber content evaluation in carbon/epoxy composites

Wróbel G., Muzia G., Pawlak S.

Archives of Materials Science and Engineering

2008

Vol. 30, nr 2

101-104

Purpose: The primary purpose of the present work was to find relationships between achieved results of the thermal non-destructive testing and the local fibre content in a carbon/epoxy composite materials. The paper also describes the methodology, a prototype testing station and results achieved during investigations. Design/methodology/approach: The experiments have been performed using a prototype testing station designed and built specially for the purpose of the investigation. Each carbon fiber reinforced plastic (CFRP) composite was prepared with different fiber content. Thermal non-destructive testing (NDT) technique was employed to measure such parameters as threshold temperature rise, upper limit temperature and temperature growth rate on the specimen surface. The results achieved were then analysed and correlated with carbon fiber content. Findings: The study has assessed the ability of IR-thermography to carry out a testing of fiber content in CFRP composite materials. The experimental results revealed relationship between fiber content and upper limit temperature and also between fiber content and temperature growth rate. Research limitations/implications: In order to obtain reliable results, there are many factors to be considered such as void content in composite matrix, type and quality of composite surface and others. Further work is needed in this area. Practical implications: The results obtained would be of considerable importance in the industrial applications to achieve a first estimate of fiber content in polymer composite materials. Originality/value: A new approach to the problem of fibre content examination has been demonstrated by means of thermal non-destructive testing. The method developed should be of interest to the industrial quality control applications and has a great importance for the products with a high failure-free requirements.