Thermographic Non-Destructive Evaluation for Natural Fiber-Reinforced Composite Laminates

Abstract

Natural fibers, including mineral and plant fibers, are increasingly used for polymer composite materials due to their low environmental impact. In this paper, thermographic non-destructive inspection techniques were used to evaluate and characterize basalt, jute/hemp and bagasse fibers composite panels. Different defects were analyzed in terms of impact damage, delaminations and resin abnormalities. Of particular interest, homogeneous particleboards of sugarcane bagasse, a new plant fiber material, were studied. Pulsed phase thermography and principal component thermography were used as the post-processing methods. In addition, ultrasonic C-scan and continuous wave terahertz imaging were also carried out on the mineral fiber laminates for comparative purposes. Finally, an analytical comparison of different methods was given.

Infrared and Terahertz time-domain imaging for evaluation of impacted thick homogeneous particleboards of sugarcane bagasse

“…The fibres are shown clearly thanks to the high resolution of the applied infrared camera. [1]. Fig.…”

“…After this mixing period, the particles were introduced into a mattress forming mold, with dimensions of 0.55 x 0.55 m and pressed with a pressure of 5 MPa at a temperature of 100 C, for a period of 10 min. At the end of the pressing process, the complete curing process of the resin required a period of 72 h [1].…”

Special Issue on ‘Novel Ideas for Infrared Thermography and Its Application to Integrated Approaches’

“…Ultrasonic C-scan and continuous wave terahertz imaging were also carried out on the mineral fiber laminates for comparative purposes. An analytical comparison of different methods was given [24].…”

Methods of Assessing Degradation of Supercapacitors by Using Various Measurement Techniques

“…The essentials and principles of thermographic measurements are described in more details, among others, in [19][20][21][22], which illustrate the conditions that should be taken into consideration while performing such type of measurements. The use of non-destructive measurement methods based on the use of the IR measurement technique is presented, inter alia, in [23,24]. Conducting thermographic tests of supercapacitors requires both proper preparation of the tested samples and consideration of a number of additional factors that may affect the measurement.…”