Numerical Simulation of the Mechanically Coupled Cook-Off Experiment

[+] Author and Article Information
Jobie M. Gerken, Joel G. Bennett

Los Alamos National Laboratory, Engineering Sciences & Applications Division, Engineering Analysis Group, MS P946, Los Alamos, NM 87545

F. W. Smith

Colorado State University, Department of Mechanical Engineering, Fort Collins, CO 80523e-mail: fred@engr.colostate.edu

J. Eng. Mater. Technol 124(2), 266-273 (Mar 26, 2002) (8 pages) doi:10.1115/1.1429936 History: Received February 10, 2000; Revised April 24, 2001; Online March 26, 2002
Copyright © 2002 by ASME
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Setup of MCCO experiment
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Optical photographs of MCCO experiment. Relative time: upper left: 0 μs, upper right: 5μs, lower left: 10 μs, lower right: 15 μs.
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(a) Multi-noded FE mesh; (b) 4 coincident nodes at an internal nodal location; (c) superposition of FEs with interface cracks
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Strain field from a small crack applied to the finite element as external work
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One-dimensional conceptual representation of ViscoSCRAM
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Finite element mesh of the HE and copper ring for the MCCO experiment
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Effective stress contours for the model after the heat up phase
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Many small discrete cracks appear near the inner surface of the HE early in the simulation. 10x displacement
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Final deformed shape of an MCCO simulation
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The (a) temperature distribution and (b) damage in HE at end of simulation shows an increase in both near the inner surface and the large discrete cracks
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The equivalent plastic strain in the copper confinement ring shows significant tangential variation as a function of the proximity to the large discrete cracks
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Several simulations show the appearance of 3–5 large cracks
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Final deformed shape of an MCCO simulation, short time step. 4x displacement.




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