Response of Plate Structures to Close-Range Blast Loading
Dr. Roger Veldman, Hope College
Since 2008, the Department of Homeland Security has been investigating the failure patterns of thin aluminum structures from close-range blasts (<10in). In order to improve Finite Element models, a parametric study of various simulation techniques using LS-DYNA was done and the results compared to physical testing data from the Aberdeen Test Center. Variations included element sizes, use of solid versus shell elements, variably concentrated mesh densities, and plastic-kinematic versus Johnson-Cook material models. While results were reasonably close to physical data, the study showed a overall lack of sensitivity to these changes, suggesting a purely Lagrangian simulation method may not be as ideal for this type of analysis as a coupled fluid-structure interaction model, such as Arbitrary Lagrangian Eulerian (ALE).
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