Tensile ratcheting behaviors of bronze powder filled polytetrafluoroethylene

doi:10.1007/s11705-013-1315-8

Frontiers of Chemical Science and Engineering

2013, Vol. 7

Issue (1): 103-109 https://doi.org/10.1007/s11705-013-1315-8

RESEARCH ARTICLE

本期目录

Tensile ratcheting behaviors of bronze powder filled polytetrafluoroethylene

Wenjuan XU, Hong GAO(

), LiLan GAO, Xu CHEN, Yong WANG

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract：

A series of tensile and ratcheting experiments for compacted polytetrafluoroethylene (PTFE) and bronze filled PTFE (PTFE/bronze) were conducted on dynamic mechanical analyzer (DMA-Q800). The effects of mean stress, stress amplitude and temperature on the ratcheting behaviors of PTFE and PTFE/bronze were investigated. It is found that the stress-strain response of PTFE/bronze is nonlinear and its elastic modulus is higher than that of pure PTFE. For uniaxial ratcheting test, the dissipation strain energy density (DSED) decreases rapidly in the first 10 cycles and approaches a constant after 20 cycles. The ratcheting strain and the DSED corresponding to 100 cycles increase with increasing mean stress, stress amplitude and temperature. Additionally, the DSED and ratcheting strain of PTFE/bronze are much lower than those of pure PTFE under the same experimental conditions. It is also found that both pure PTFE and PTFE/bronze present cyclic hardening characteristics. Above all, the addition of bronze can improve both the uniaxial tensile property and the cyclic property of PTFE.

Key words： bronze filled polytetrafluoroethylene (PTFE/bronze) uniaxial tensile behavior ratcheting behavior dissipation strain energy density (DSED)

收稿日期: 2012-10-16 出版日期: 2013-03-05

Corresponding Author(s): GAO Hong,Email:hgao@tju.edu.cn

引用本文:

. Tensile ratcheting behaviors of bronze powder filled polytetrafluoroethylene[J]. Frontiers of Chemical Science and Engineering, 2013, 7(1): 103-109.
Wenjuan XU, Hong GAO, LiLan GAO, Xu CHEN, Yong WANG. Tensile ratcheting behaviors of bronze powder filled polytetrafluoroethylene. Front Chem Sci Eng, 2013, 7(1): 103-109.

链接本文:

https://academic.hep.com.cn/fcse/CN/10.1007/s11705-013-1315-8
https://academic.hep.com.cn/fcse/CN/Y2013/V7/I1/103

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