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Title: Investigation of the fragmentation of an explosively driven cylinder

Abstract

Explosively driven fragmentation is highly complex. To better understand the field detonation, different methodologies (Lagrangian (with a failure threshold in VisIt and element erosion), ALE and embedded grid) were simulated to provide a comparison to the experimental data through the utilization of fragment distributions and gross deformation metrics. Provided with the geometrical parameters and the results from the experimental data, the computer simulations were conducted after the successful writing of each input file. Mesh refinement – a scalar multiplier applied to the mesh to refine the results – was then studied. The objective was to find a value that parallels the experimental results as the mesh can be refine indefinitely, theoretically. Various mesh resolution scales were simulated and the results graphically compared, using the damage and failure variables from a statistical Johnson Cook failure model, the number of fragments over time as well as time required for each simulation to run and number of processors utilized. The desired result is a calculated method to quantify the comparison being performed.

Authors:
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1179434
Report Number(s):
LLNL-TR-666136
DOE Contract Number:
AC52-07NA27344
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE

Citation Formats

Arthur, C. W., and Dunn, T. A.. Investigation of the fragmentation of an explosively driven cylinder. United States: N. p., 2015. Web. doi:10.2172/1179434.
Arthur, C. W., & Dunn, T. A.. Investigation of the fragmentation of an explosively driven cylinder. United States. doi:10.2172/1179434.
Arthur, C. W., and Dunn, T. A.. Fri . "Investigation of the fragmentation of an explosively driven cylinder". United States. doi:10.2172/1179434. https://www.osti.gov/servlets/purl/1179434.
@article{osti_1179434,
title = {Investigation of the fragmentation of an explosively driven cylinder},
author = {Arthur, C. W. and Dunn, T. A.},
abstractNote = {Explosively driven fragmentation is highly complex. To better understand the field detonation, different methodologies (Lagrangian (with a failure threshold in VisIt and element erosion), ALE and embedded grid) were simulated to provide a comparison to the experimental data through the utilization of fragment distributions and gross deformation metrics. Provided with the geometrical parameters and the results from the experimental data, the computer simulations were conducted after the successful writing of each input file. Mesh refinement – a scalar multiplier applied to the mesh to refine the results – was then studied. The objective was to find a value that parallels the experimental results as the mesh can be refine indefinitely, theoretically. Various mesh resolution scales were simulated and the results graphically compared, using the damage and failure variables from a statistical Johnson Cook failure model, the number of fragments over time as well as time required for each simulation to run and number of processors utilized. The desired result is a calculated method to quantify the comparison being performed.},
doi = {10.2172/1179434},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 09 00:00:00 EST 2015},
month = {Fri Jan 09 00:00:00 EST 2015}
}

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