Use of infrared thermography to investigate the fatigue behavior of a carbon fiber reinforced polymer composite

On the fatigue response of a bonded repaired aerospace composite using thermography

“…Intrinsic heat dissipation in polymer composites is mainly a result of the viscoelastic nature of the material, internal friction, matrix cracking, interface failure, etc. [38]. In the case of brittle fibrous composites, this monotonic temperature increase can also be attributed to heat release due to the accumulating flaws in the structure which in the presence of irreversible processes may overcome the thermoelastic effect [39].…”

“…2, [40]), then three stages should be observed, i.e. a steep temperature increase in stage (i) followed by a mild temperature increase in stage (ii) and finally a rapid temperature increase leading to failure for stage (iii) [38,41]. 3.…”

Fatigue Life and Residual Strength prediction of GFRP Composites: An Experimental and Theoretical approach

“…The fatigue studies in the literature, point out to the absence of true fatigue limit for composites (Harris, 2003b;Montesano et al, 2013). Literature (Post, 2005;Harris, 2003b;Demers, 1998;Kaminski et al, 2015;Colombo et al, 2011;Tomblin and Seneviratne, 2011) also indicates that, the GFRP specimens have not failed up to 50000 cycles when the stress levels range between 30% to 60% of the ultimate tensile strength.…”

Fatigue Limit Evaluation of Composite Materials by Means of TSA

“…Infrared Thermography Technique (IRT) has been exploited to better understand fatigue damage on different type of materials: such as metals and composites [8][9][10]. Moreover several methods and data analysis have been developed to obtain the information about the fatigue behaviour by studying heat sources generated during tests [11][12][13][14][15]. Graphical method to assess fatigue limit in metals has been proposed by Luong [16] and Risitano [17], by adopting the surface temperature detection in samples during a stepwise loading procedure.…”