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Title: Constitutive modeling of the dynamic-tensile-extrusion test of PTFE

Journal Article · · AIP Conference Proceedings
DOI:https://doi.org/10.1063/1.4971725· OSTI ID:1544755
 [1]; ORCiD logo [2];  [2]; ORCiD logo [2]
  1. Weapons and Combat Systems Division, Edinburgh (Australia)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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Use of polymers in defense, aerospace and industrial applications under extreme loading conditions makes prediction of the behavior of these materials very important. Crucial to this is knowledge of the physical damage response in association with phase transformations during loading and the ability to predict this via multi-phase simulation accounting for thermodynamical non-equilibrium and strain rate sensitivity. The current work analyzes Dynamic-Tensile-Extrusion (Dyn-Ten-Ext) experiments on polytetrafluoroethylene (PTFE). In particular, the phase transition during loading and subsequent tension are analyzed using a two-phase rate sensitive material model implemented in the CTH hydrocode. The calculations are compared with experimental high-speed photography. Deformation patterns and their link with changing loading modes are analyzed numerically and correlated to the test observations. It is concluded that the phase transformation is not as critical to the response of PTFE under Dyn-Ten-Ext loading as it is during the Taylor rod impact testing.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1544755
Report Number(s):
LA-UR-15-26155
Journal Information:
AIP Conference Proceedings, Vol. 1793, Issue 1; Conference: 19.Biennial Conference on Shock Compression of Condensed Matter (SCCM-2015), Tampa Bay, FL (United States), 14-19 Jun 2015; ISSN 0094-243X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

References (8)

The influence of temperature and strain rate on the tensile and compressive constitutive response of four fluoropolymers journal July 2006
Constitutive modeling of shock response of phase-transforming and porous materials with strength journal October 2010
Constitutive modeling of shock response of polytetrafluoroethylene journal August 2011
Pressure-induced phase change in poly(tetrafluoroethylene) at modest impact velocities journal September 2005
Dynamic-Tensile-Extrusion for investigating large strain and high strain rate behavior of polymers journal December 2012
The properties of poly(tetrafluoroethylene) (PTFE) in tension journal September 2005
Phase transition modeling of polytetrafluoroethylene during Taylor impact journal December 2014
Dynamic-Tensile-Extrusion Response of Fluoropolymers
  • Brown, E. N.; Trujillo, C. P.; Gray, G. T.
  • SHOCK COMPRESSION OF CONDENSED MATTER 2009: Proceedings of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings https://doi.org/10.1063/1.3295027
conference January 2009

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