The NTIS website and supporting ordering systems are undergoing a major upgrade from 8PM on September 25th through approximately October 6. During that time, much of the functionality, including subscription and product ordering, shipping, etc., will not be available. You may call NTIS at 1-800-553-6847 or (703) 605-6000 to place an order but you should expect delayed shipment. Please do NOT include credit card numbers in any email you might send NTIS.
Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number ADA571176
Title Enhancements and Analysis of CTH Software for Underbody Blast.
Publication Date Feb 2013
Media Count 80p
Personal Author C. Moore R. Thyagarajan R. Weed
Abstract Accurate tools and procedures for simulating the blast effects of shallow buried explosive devices are critical to the Department of Defense's efforts to design blast-resistant vehicles that can increase crew survivability and counter the threat from improvised explosive devices. Of the various computer codes available for modeling explosive effects, the CTH (CHART Squared to the Three-Halves) Eulerian hydrocode from Sandia National Laboratories is one of the most popular and is considered a standard tool for blast simulations. TARDEC is using CTH as one of its tools for designing blast-resistant vehicles. Two potential areas of improvement to CTH that will enhance its value are implementation of Hybrid Elastic-Plastic (HEP) Geo-material model to support buried mine simulation and procedures for utilizing CTH-generated blast loads in LS-DYNA structural dynamics simulations. Both of these enhancements have been implemented into CTHv9.1 and tested in this project.
Keywords Ale(Arbitrary lagrangian eulerian)
Blast loads
Blast resistance
Blast simulations
Buried objects
Code coupling
Computer programs
Computerized simulation
Cth(Chart squared to the three-halves)
Equations of state
Explosion effects
Explosive charges
Fluid- structure interactions
Hep(Hybrid elastic-plastic)
Imd(Impulse measurement device)
Improvised explosive devices
Impulse loading
Ls-dyna code
Military vehicles
Simbrs(Simulation-based reliability and safety)
Soil modeling
Structural dynamics
Structural properties
Underbody blast
Vehicle hulls

Source Agency Non Paid ADAS
NTIS Subject Category 62B - Computer Software
85 - Transportation
79E - Detonations, Explosion Effects, & Ballistics
46E - Structural Mechanics
Corporate Author Mississippi State Univ., Starkville. Center for Advanced Vehicular Systems.
Document Type Technical report
Title Note Final rept. 1 Oct 2010-31 Dec 2012.
NTIS Issue Number 1315
Contract Number W56HZV-08-C-0236

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader