High-density polyethylene damage at extreme tensile conditions

In-situ and postmortem observations of the dynamic tensile failure and damage evolution of high-density polyethylene (HDPE) are made during Dynamic-Tensile-Extrusion (Dyn-Ten-Ext) loading. The Dyn-Ten-Ext technique probes the tensile response of materials at large strains (>1) and high strain-rat...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.500 (11), p.112011-6
Main Authors: Brown, E N, Furmanski, J, Ramos, K J, Dattelbaum, D M, Jensen, B J, Iverson, A J, Carlson, C A, Fezzaa, K, Gray, G T, Patterson, B M, Trujillo, C P, Martinez, D T, Pierce, T H
Format: Article
Language:English
Subjects:
Computed tomography
Damage
Evolution
Extrusion
High density
High density polyethylenes
Imaging
Impact damage
Loads (forces)
Physics
Polyethylene
Polyethylenes
Projectiles
Synchrotrons
Tomography
X ray imagery
X-rays
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Summary:In-situ and postmortem observations of the dynamic tensile failure and damage evolution of high-density polyethylene (HDPE) are made during Dynamic-Tensile-Extrusion (Dyn-Ten-Ext) loading. The Dyn-Ten-Ext technique probes the tensile response of materials at large strains (>1) and high strain-rates (>105 s−1) by firing projectiles through a conical die. Postmortem sectioning elucidates a mechanism of internal damage inception and progression. X-ray computed tomography corroborates shear damage with cracks nearly aligned with the extrusion axis but separated by unfailed internal bridges of material. In-situ measurements of damage are made with the impact system for ultrafast synchrotron experiments (IMPULSE) using the advanced imaging X-ray methods available at the Advanced Photon Source. Multiple frame phase-contrast imaging (PCI) elucidates the evolution of damage features in HDPE during Dyn-Ten-Ext loading that is observed in postmortem sectioning and X-ray tomography.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/500/11/112011