LI Yun-lu1, YIN Jian-ping1, LIU Tong-xin2
(1. College of Mechatronic Engineering, North University of China, Taiyuan 030051, China；2. School of Aerospace, Air Force Engineering University, Xi’an 710038, China)
Abstract： In order to study the mechanical properties of modified low-density polytetrafluoroethylene (PTFE), universal testing machine is used for quasi-static tension and compression tests and Hopkinson bar test is for mechanical property under impact load. The mechanical properties of the samples with different length-diameter ratios under different impact loads are analyzed and dynamic response characteristics of the modified PTFE at different impact speeds are studied. The results show that, adding the copper powder in PTFE material can increase not only the tensile strength and elongation of the PTFE material significantly, but also the compressive strength; with the increase of strain rate, the yield strength of modified PTFE increases.
Key words： mechanical properties; modified polytetrafluoroethylene (PTFE); split Hopkinson pressure bar (SHPB)
CLD number： TJ410.4 Document code： A
Article ID： 1674-8042（2015）04-0390-06 doi： 10.3969/j.issn.1674-8042.2015.04.015
References
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改性聚四氟乙烯材料的力学性能实验研究
李运禄1， 尹建平1， 刘同鑫2
（1. 中北大学 机电工程学院， 山西 太原 030051； 2. 空军工程大学 航空航天工程学院， 陕西 西安 710038）
摘要:为了研究改性低密度聚四氟乙烯材料的力学性能， 利用万能试验机进行了准静态拉伸和压缩试验， 通过霍普金森杆实验研究其在冲击载荷作用下的动态力学特性。 对不同长径比改性与非改性试样在不同载荷加载下的力学特性以及不同冲击速度下的动态响应特性进行了分析。 结果表明， 通过在聚四氟乙烯材料中添加铜粉可以提高其抗拉强度， 改善伸长率， 增强抗压缩强度； 随应变率的增大， 改性聚四氟乙烯的屈服强度得到提高。
关键词:力学性能； 改性PTFE材料； 分离式霍普金森压杆
引用格式：LI Yun-lu, YIN Jian-ping, LIU Tong-xin. Experimental study on mechanical properties of modified polytetrafluoroethylene. Journal of Measurement Science and Instrumentation, 2015, 6(4)： 390-395. ［doi： 10.3969／j.issn.1674-8042.2015.04.015］
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