High-density polyethylene damage at extreme tensile conditions

18th APS-SCCM; 24th AIRAPT

Brown, E.N.^1 ; Furmanski, J.^1,4 ; Ramos, K.J.^1 ; Dattelbaum, D.M.^1 ; Jensen, B.J.^1 ; Iverson, A.J.^2 ; Carlson, C.A.^2 ; Fezzaa, K.^3 ; Gray, G.T.^1 ; Patterson, B.M.^1 ; Trujillo, C.P.^1 ; Martinez, D.T.^1 ; Pierce, T.H.^1

Los Alamos National Laboratory, Los Alamos

NM

87545, United States^1

National Security Technologies LLC, Los Alamos

NM

87544, United States^2

APS, Argonne National Laboratory, Argonne

IL

60439, United States^3

ExxonMobil Research and Engineering, Annandale

NJ

08801, United States^4

关键词: Advanced photon source;    Dynamic tensile extrusions;    High density polyethylene(HDPE);    High strain rates;    In-situ measurement;    Phase-contrast imaging;    X-ray computed tomography;    X-ray tomography;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/11/112011/pdf
DOI  :  10.1088/1742-6596/500/11/112011

来源: IOP

【 摘 要 】

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 (>105s-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.