skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A comparison of shockwave dynamics in stochastic and periodic porous polymer architectures

Abstract

Dynamic loading of materials is fundamental in understanding the mechanical response of cellular solids and elucidates time dependent properties that pertain to energy absorption under extreme conditions. Of particular interest is how the discrete behavior of the individual cell in a stochastic foam affects the dynamic shockwave behavior. The deformation mechanism in a stochastic open-cell foam is bending-dominated versus stretch-dominated in periodic lattice structures, resulting in a decrease in the plastic yield stress. We investigate shockwave dynamics in stochastic open-cell foams through phase contrast imaging and finite element modeling. We observe that the distribution of pore sizes and the proximity of each produces a random topology with varying cell wall thicknesses that cause points of high strain creating irregularity in the shock wave at higher impact speeds. The shockwave dynamics of the stochastic foam are compared to periodic additive manufactured (AM) foams with similar density and it can be observed that modulation via microstructural control in elastomer foams has a dramatic effect on shockwave dynamics.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC); LANL Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1482007
Report Number(s):
LA-UR-18-26269
Journal ID: ISSN 0032-3861
Grant/Contract Number:  
AC52-06NA25396; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Polymer
Additional Journal Information:
Journal Name: Polymer; Journal ID: ISSN 0032-3861
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Branch, Brittany, Ionita, Axinte, Patterson, Brian M., Schmalzer, Andrew, Clements, Bradford, Mueller, Alexander, and Dattelbaum, Dana M. A comparison of shockwave dynamics in stochastic and periodic porous polymer architectures. United States: N. p., 2018. Web. doi:10.1016/j.polymer.2018.10.074.
Branch, Brittany, Ionita, Axinte, Patterson, Brian M., Schmalzer, Andrew, Clements, Bradford, Mueller, Alexander, & Dattelbaum, Dana M. A comparison of shockwave dynamics in stochastic and periodic porous polymer architectures. United States. doi:10.1016/j.polymer.2018.10.074.
Branch, Brittany, Ionita, Axinte, Patterson, Brian M., Schmalzer, Andrew, Clements, Bradford, Mueller, Alexander, and Dattelbaum, Dana M. Thu . "A comparison of shockwave dynamics in stochastic and periodic porous polymer architectures". United States. doi:10.1016/j.polymer.2018.10.074.
@article{osti_1482007,
title = {A comparison of shockwave dynamics in stochastic and periodic porous polymer architectures},
author = {Branch, Brittany and Ionita, Axinte and Patterson, Brian M. and Schmalzer, Andrew and Clements, Bradford and Mueller, Alexander and Dattelbaum, Dana M.},
abstractNote = {Dynamic loading of materials is fundamental in understanding the mechanical response of cellular solids and elucidates time dependent properties that pertain to energy absorption under extreme conditions. Of particular interest is how the discrete behavior of the individual cell in a stochastic foam affects the dynamic shockwave behavior. The deformation mechanism in a stochastic open-cell foam is bending-dominated versus stretch-dominated in periodic lattice structures, resulting in a decrease in the plastic yield stress. We investigate shockwave dynamics in stochastic open-cell foams through phase contrast imaging and finite element modeling. We observe that the distribution of pore sizes and the proximity of each produces a random topology with varying cell wall thicknesses that cause points of high strain creating irregularity in the shock wave at higher impact speeds. The shockwave dynamics of the stochastic foam are compared to periodic additive manufactured (AM) foams with similar density and it can be observed that modulation via microstructural control in elastomer foams has a dramatic effect on shockwave dynamics.},
doi = {10.1016/j.polymer.2018.10.074},
journal = {Polymer},
issn = {0032-3861},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 1, 2019
Publisher's Version of Record

Save / Share: