Thermomechanical coupling of PVC sheet with defects under uniaxial loading at different rates and different sizes of microbores was studied. The local temperature field of the dynamic damage-rupture process zone at crack tip was surveyed with infrared thermographic sensor. Based on the irreversible thermomechanics theory, the dissipation law of deformation-heat effect during the whole process was found. Furthermore, the effect of thermoelasticity in the initial stage of extension was explained.
In tensile viscoplastic deformation process of a Polyvinyl Chloride sheet, a local heterogeneous temperature field emerges around the viscoplastic areas of specimen surface. Rapid changing temperature gradient will lead a pyromagnetic effect. A self developed sensors system is employed to detect the magnetic intensity coupling thermal changes in experiments. In the meanwhile, the local nonuniform temperature field is recorded with a thermal infrared imager and is analyzed.
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