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Title: On compression and damage evolution in two thermoplastics

The well-known Taylor cylinder impact test, which follows the impact of a flat-ended cylindrical rod onto a rigid stationary anvil, is conducted over a range of impact speeds for two polymers, polytetrafluoroethylene (PTFE) and polyetheretherketone (PEEK). In previous work, experiments and a model were developed to capture the deformation behaviour of the cylinder after impact. These works showed a region in which spatial and temporal variation of both longitudinal and radial deformation provided evidence of changes in phase within the material. In this further series of experiments, this region is imaged in a range of impacted targets at the Diamond synchrotron. Further techniques were fielded to resolve compressed regions within the recovered polymer cylinders that showed a fracture zone in the impact region. The combination of macroscopic high-speed photography and three-dimensional X-ray imaging has identified the development of failure with these polymers and shown that there is no abrupt transition in behaviours but rather a continuous range of responses to competing operating mechanisms. The behaviours noted in PEEK in these polymers show critical gaps in understanding of polymer high strain-rate response.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [4]
  1. Univ. of Manchester (United Kingdom)
  2. Univ. of Manchester (United Kingdom); Defence Science and Technology Organisation, Adelaide (Australia)
  3. Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-22185
Journal ID: ISSN 1364-5021; TRN: US1800636
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences
Additional Journal Information:
Journal Volume: 473; Journal Issue: 2197; Journal ID: ISSN 1364-5021
Publisher:
The Royal Society Publishing
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1414106

Bourne, N. K., Garcea, S. C., Eastwood, D. S., Parry, S., Rau, C., Withers, P. J., McDonald, S. A., and Brown, E. N.. On compression and damage evolution in two thermoplastics. United States: N. p., Web. doi:10.1098/rspa.2016.0495.
Bourne, N. K., Garcea, S. C., Eastwood, D. S., Parry, S., Rau, C., Withers, P. J., McDonald, S. A., & Brown, E. N.. On compression and damage evolution in two thermoplastics. United States. doi:10.1098/rspa.2016.0495.
Bourne, N. K., Garcea, S. C., Eastwood, D. S., Parry, S., Rau, C., Withers, P. J., McDonald, S. A., and Brown, E. N.. 2017. "On compression and damage evolution in two thermoplastics". United States. doi:10.1098/rspa.2016.0495. https://www.osti.gov/servlets/purl/1414106.
@article{osti_1414106,
title = {On compression and damage evolution in two thermoplastics},
author = {Bourne, N. K. and Garcea, S. C. and Eastwood, D. S. and Parry, S. and Rau, C. and Withers, P. J. and McDonald, S. A. and Brown, E. N.},
abstractNote = {The well-known Taylor cylinder impact test, which follows the impact of a flat-ended cylindrical rod onto a rigid stationary anvil, is conducted over a range of impact speeds for two polymers, polytetrafluoroethylene (PTFE) and polyetheretherketone (PEEK). In previous work, experiments and a model were developed to capture the deformation behaviour of the cylinder after impact. These works showed a region in which spatial and temporal variation of both longitudinal and radial deformation provided evidence of changes in phase within the material. In this further series of experiments, this region is imaged in a range of impacted targets at the Diamond synchrotron. Further techniques were fielded to resolve compressed regions within the recovered polymer cylinders that showed a fracture zone in the impact region. The combination of macroscopic high-speed photography and three-dimensional X-ray imaging has identified the development of failure with these polymers and shown that there is no abrupt transition in behaviours but rather a continuous range of responses to competing operating mechanisms. The behaviours noted in PEEK in these polymers show critical gaps in understanding of polymer high strain-rate response.},
doi = {10.1098/rspa.2016.0495},
journal = {Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences},
number = 2197,
volume = 473,
place = {United States},
year = {2017},
month = {1}
}