Experimental research on pyromagnetic effect of PVC sheet with defects

ZHANG Liang1,LUO Ying-she1,SU Jian-xin2,ZHANG Yong-zhong3,CHEN Sheng-ming1,LUO Shu-ling4,DENG Rui-ji5,DENG Xu-hua6 (1.Institute of Rheological Mechanics and Material Engineering,Central South University of Forestry and Technology,Changsha 410004,Hunan,China;2.College of Information Engineering,Xiangtan University,Xiangtan 411105,Hunan,China;3.College of Computer Science and Information Technology,Central South University of Forestry and Technology,Changsha 410004,Hunan,China;4.College of Business,Central South University of Forestry and Technology,Changsha 410004,Hunan,China;5.College of Civil Engineering and Mechanics,Central South University of Forestry and Technology,Changsha 410004,Hunan,China;6.College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411105,Hunan,China)

PVC sheet;high polymer;pyromagnetic effect;viscoplastic deformation;thermo-mechanical coupling property

A kind of high polymer,polyvinyl chloride(PVC) sheet was used as material and made into tensile samples with defects.Then,under room temperature,the tensile tests were carried out under different strain-rates and with the same defect sizes,or under the same strain-rates but with different defect sizes.The pyromagnetic effect of high polymer with defects was measured by using the whole-region surveying system self-developed by the researchists,and by means of infrared thermographic sensor.The experimental data show that this kind of effect was produced owing to the thermo-mechanical coupling property and the pyromagnetic induction intensity B was strongly depended on the tensile strain-rate and the size of defect.The findings provides a new theoretical and experimental basis for the reasonable use and design new materials.It has an important theoretical significance and application value for the life prediction,safe production and accident prevention of new materials.