Constitutive Modelling of Shock Response of PTFE

Research output: Chapter in Book/Report/Conference proceedingChapter

  • External authors:
  • A D Resnyansky
  • J C F Millett
  • E N Brown
  • M L Elert (Editor)
  • W T Buttler (Editor)
  • M D Furnish (Editor)
  • W W Anderson (Editor)
  • W G Proud (Editor)

Abstract

Polytetrafluoroethylene (PTFE) is a complex semicrystalline polymer with four pressure and temperature dependent crystalline phases. As has been recently studied, the crystalline region grows with load. Shock-wave profiles reported from embedded gauges demonstrate features that may be related to impedance mismatches between the regions subjected to some transitions resulting in density and modulus variations. We consider the amorphous-to-crystalline and the high-pressure Phase II-III transitions in the current simulation analysis. The present work utilizes a multi-phase rate sensitive model to describe shock response of the PTFE material. One-dimensional experimental shock wave histories are compared with calculated profiles using kinetics describing the transitions. The objective of this study is to understand the role of the various transitions in the shock response of PTFE.

Bibliographical metadata

Original languageEnglish
Title of host publicationShock Compression of Condensed Matter - 2009, Pts 1 and 2
Pages1183-1186
Number of pages4
Volume1195
Publication statusPublished - 2009

Publication series

NameAIP Conference Proceedings