Computational methods for the dynamic compaction of porous solids

Authors
Lucier, Joseph
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Other Contributors
Oberai, Assad
Sahni, Onkar
Shephard, Mark S.
Drew, Donald A. (Donald Allen), 1945-
Issue Date
2016-12
Keywords
Aeronautical engineering
Degree
MS
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
Full Citation
Abstract
A 78% dense porous aluminum material was chosen and run through a variety of simulations to predict its compaction under dynamic loadings. The results of these computations were compared to experimental data collected by Butcher in 1974 on exactly the same material [3]. The results show that the p-alpha method is extremely accurate and reliable for predicting the quasistatic compaction of a porous material, but fails to predict the subtle differences when the material is subjected to dynamic loadings. At stresses below 2kbar, the continuum mixture theory model correctly predicted dynamic compaction effects on the material density. However, at higher stresses, the model incorrectly predicted the onset of complete compaction and the results were skewed from the experimental data presented by Butcher. The models and methods Kodiak provides are constantly under development, and show promise toward reliably providing more advanced methods for simulation of shock physics problems and their applications.
Description
December 2016
School of Engineering
Department
Dept. of Mechanical, Aerospace, and Nuclear Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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