Abstract
In this study, we present results from 3D photothermal imaging of the damage evolution in fibrous composite materials due to fatigue loading using the virtual wave concept. We apply pulsed thermography during step-wise fatigue loading for a carbon fiber-reinforced polymer sample, which contains a central open hole. In addition, we discuss the influence of the ambient conditions from in-situ photothermal testing on the virtual wave signal. Comparison with 3D computed tomography measurement data shows very good agreement with thermographic reconstructions. Thermography has the advantage over other methods that it allows inline measurements directly on the tensile testing machine
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