Strain energy evolution analysis of elastic-plastic deformation on polycarbonate by infrared radiation characteristics

In this study, strain energy evolution characteristics of polycarbonate at different loading rates were measured under the tensile loading using infrared thermography. The variation of elastic strain energy, plastic strain energy and infrared radiation were analysed. The experimental results revealed that elastic strain energy and infrared radiation variation have a linear correlation, and the third power correlation between plastic strain energy and infrared radiation variation was obtained. Based on the principle of energy transfer and storage, the elastic strain energy infrared radiation coefficient and the plastic strain energy infrared radiation coefficient were proposed to quantitatively determine the elastic and plastic strain energy via infrared radiation. It is provided a valuable reference to predict and monitor the deformation and failure of polycarbonate based on the infrared thermography.