期刊论文

Experimental research on pyromagnetic effect of PVC sheet with defects

中文

中南林业科技大学学报

Journal of Central South University of Forestry & Technology

1673-923X

2011

31

8

172-177

10.14067/j.cnki.1673-923x.2011.08.006

国家自然科学基金项目(10672191,11072270)；

本校为第一机构

以PVC(聚氯乙烯)板材作为试验材料,制作成单向拉伸试件,在室温条件下,进行了相同速率不同缺陷尺寸和相同缺陷不同拉伸速率下的拉伸实验。运用项目组自主研发的高聚物热致磁效应全域测量系统和红外热像仪对高聚物热致磁效应进行了量测。实验结果表明,含缺陷PVC板材在拉伸过程中,由于拉伸载荷和粘塑性变形热等热-力耦合作用会导致热致磁效应,且这种热磁效应强度B强烈地依赖于应变速率和缺陷尺寸。本研究结果为对合理使用和设计新型材料提供了新的理论和实验依据,对新型材料的寿命预测、安全生产、事故防范等具有重要的理论意义和工程应用价值。

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 straiwrates 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 eff...