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MARC Record
Bibliographic Data
Control Number
311325
Date and Time of Latest Transaction
20150706093045.AM
General Information
150706s |||||||||b ||00|||
Cataloging Source
STII-DOST
Local Call Number
ScienceDirect
Main Entry - Personal Name
Scott, C.M.
Hopson, M.V.
Patel, R.
Title Statement
Computational comparisons of homogeneous and statistical descriptions of AerMet100 steel subjected to high strain rate loading by M.V. Hopson, C.M. Scott and R. Patel
Physical Description
pages 451-455 computer file; text; 909kb
Summary, Etc.
In order to simulate the effect of material microstructure a statistically compensated Johnson-Cook (JC) fracture model has been implemented into the Eulerian shock physics code, CTH. This model uses a Weibull function to produce a distribution of initial failure strains within the JC fracture model. A parametric analysis where the Weibull modulus was systematically varied was conducted on two sets of experimental fragmentation data. The first experiment consisted of an explosively loaded cylinder of AerMet100. The second was an expanding tube experiment which used a plastic cylinder to load the AerMet100 and provided a problem at a lower strain rate. In both sets of experiments, the fragments were soft captured for later examination. While CTH does not explicitly track fragments, a post processor written at the Naval Surface Warfare Center Dahlgren Division was used to calculate the mass of each of the fragments in the expanding debris cloud. The results were analyzed and compared back to baseline homogeneous calculations. The use of a statistically compensated JC fracture model substantially improved the fragment mass distribution for the explosively loaded cylinder. However, the lower strain rate expanding tube showed only minimal improvement. A probable reason for this limitation and future analysis are discussed
Subject Added Entry - Topical Term
Engineering
Steel -- Analysis
Fracture (Materials) -- Analysis
Engineering and manufacturing industries
Location
DOST STII ScienceDirect NONPRINTS NP 14-15484 1 14-15484 Online/Download 2012-01-12
Physical Location
Department of Science and Technology
Science and Technology Information Institute
ScienceDirect
Digital Copy
Not Available
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