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 mech...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 sig- nificantly, but also the compressive strength; with the increase of strain rate, the yield strength of modified PTFE increases.展开更多
基金Graduate Education Innovation Project of Shanxi Province(No.2015SY59)
文摘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 sig- nificantly, but also the compressive strength; with the increase of strain rate, the yield strength of modified PTFE increases.
