Accession Number ADA571166
Title Simulating Underbelly Blast Events using Abaqus/Explicit - CEL.
Publication Date Jan 2013
Media Count 17p
Personal Author B. Nandi J. Arata J. Jablonski P. Carlucci R. Thyagarajan
Abstract Accurate modeling and simulation of the effects of near-field blast events on vehicles and personnel is of interest to the Department of Defense. Applications include minimizing casualties and improving vehicle survivability from attacks using improvised explosive devices. The coupled Eulerian- Lagrangian (CEL) capability in Abaqus/Explicit was used to replicate experimental tests in which the structural response of varying metal panels subjected to the detonation of a buried charge was characterized. A Lagrangian representation was used for the test structure and panel and an Eulerian representation was used for the soil, explosive, and ambient air. The detonation of the charge was approximated using programmed burned techniques and its detonation products were modeled with the Jones-Wilkins-Lee (JWL) equation of state. A simplified hybrid elastic-plastic material model for geologic materials developed by the U.S. Army - ERDC was implemented as a VUMAT and used to describe the soil. The simulations agree favorably with the test results and produce higher fidelity solutions than traditional analytical or empirical blast models. It is shown that Abaqus/Explicit can be used to accurately predict the response of a structure subjected to a near-field blast event with specific application to underbelly blast events on vehicles.
Keywords Blast
Buried objects
Equations of state
Euler equations
Explosive charges
Finite element analysis
Fluid-structure interactions
Hybrid elastic-plastic soil model
Jones wilkins lee equation of state
Lagrangian functions
Mathematical models
Near field
Near field blast
Structural response
Underbelly blast

Source Agency Non Paid ADAS
NTIS Subject Category 72B - Algebra, Analysis, Geometry, & Mathematical Logic
79E - Detonations, Explosion Effects, & Ballistics
46E - Structural Mechanics
Corporate Author Hibbitt, Karlsson and Sorensen, Providence, RI.
Document Type Technical report
Title Note Conference paper.
NTIS Issue Number 1315
Contract Number N/A

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