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Research Papers: Design and Analysis

Structural Response Optimization of a Light-Weight Composite Blast Containment Vessel

[+] Author and Article Information
Jagadeep Thota

Department of Mechanical Engineering, University of Nevada, Las Vegas, 4505 Maryland Parkway, Box 454027, Las Vegas, NV 89154jagadeep@gmail.com

Mohamed B. Trabia

Department of Mechanical Engineering, University of Nevada, Las Vegas, 4505 Maryland Parkway, Box 454027, Las Vegas, NV 89154mbt@me.unlv.edu

Brendan J. O’Toole

Department of Mechanical Engineering, University of Nevada, Las Vegas, 4505 Maryland Parkway, Box 454027, Las Vegas, NV 89154bj@me.unlv.edu

Ashok K. Ayyaswamy

Department of Mechanical Engineering, University of Nevada, Las Vegas, 4505 Maryland Parkway, Box 454027, Las Vegas, NV 89154ashoka@egr.unlv.edu

J. Pressure Vessel Technol 131(3), 031209 (Apr 20, 2009) (9 pages) doi:10.1115/1.3110013 History: Received January 27, 2008; Revised August 12, 2008; Published April 20, 2009

This paper proposes an optimization technique for increasing the structural integrity of a light-weight composite blast containment vessel. The vessel is cylindrical with two hemispherical ends. It has a steel liner that is internally reinforced with throttles and gusset plates and wrapped with a basalt-plastic composite. A computationally-efficient finite element model of the blast containment vessel was proposed and verified in an earlier work. The parameters of the vessel are incorporated within an iterative optimization procedure to decrease the peak strains within the vessel, which are caused by internal blast loading due to an explosive charge placed at the center of the vessel. The results of the proposed procedure are validated for different initial guesses of the design variables.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

AT595 blast containment vessel

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Figure 2

Engineering stress-strain curve for polymer-foam material

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Figure 3

Finite element model of AT595 blast containment vessel

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Figure 4

Peak strain at different locations on the cylindrical portion of vessel

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Figure 5

Profile of the cap portion (design variable)

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Figure 6

The fixed portion of the vessel obtained from LS-DYNA

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Figure 7

The variable portion of the vessel created from MATLAB code

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Figure 8

Flowchart of the optimization process

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Figure 9

Circumferential strain at the center of the vessel for the initial guess and final result of Case 4

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Figure 10

Peak circumferential strain contour at the initial guess for Case 4

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Figure 11

Peak circumferential strain contour after optimization for Case 4

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Figure 12

Cap profile of the blast vessel

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