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PLASTIC DEFORMATION AND FRACTURE OF STEELS UNDER DYNAMIC BIAXIAL LOADING

Description: Dynamic equi-biaxial bulging of thin AerMet 100 alloy plates was studied. The plates were deformed using a gas-gun driven flyer plate test set-up at impact velocities between 1.0 and 2.0 km/sec. The results indicate that in addition to biaxial stretching (and thinning) of the plate, internal cavitation (spallation fracture) results from the complex wave interactions within the plate. No outward evidence of damage was observed at the lower velocities, in the range of 1.0-1.2 km/sec. Fine scale c… more
Date: July 8, 2004
Creator: Syn, C; Moreno, J; Goto, D M; Belak, J & Grady, D
Partner: UNT Libraries Government Documents Department
open access

MatProps: Material Properties Database and Associated Access Library

Description: Coefficients for analytic constitutive and equation of state models (EOS), which are used by many hydro codes at LLNL, are currently stored in a legacy material database (Steinberg, UCRL-MA-106349). Parameters for numerous materials are available through this database, and include Steinberg-Guinan and Steinberg-Lund constitutive models for metals, JWL equations of state for high explosives, and Mie-Gruniesen equations of state for metals. These constitutive models are used in most of the simula… more
Date: August 13, 2007
Creator: Durrenberger, J K; Becker, R C; Goto, D M; Neely, J R & Wallin, B K
Partner: UNT Libraries Government Documents Department
open access

Metallurgical Analysis of Dynamically Deformed Aermet 100 Alloy Fragments

Description: Microstructural characterization of soft-captured fragments of explosive-driven AerMet 100 alloy hollow cylinders is performed to understand dynamic deformation and localization phenomena. Examination of the fragments reveals the deformation is characterized by bands of localized shear strain and cracking. Fracture surface morphologies for the cylinders are ductile dimples, indicative of tensile or shear failure. Although both annealed and maraged AerMet 100 exhibit similar phenomenon, the widt… more
Date: August 23, 2004
Creator: Sunwoo, A J; Becker, R; Goto, D M; Orzechowski, T J; Springer, H K & Syn, C K
Partner: UNT Libraries Government Documents Department
open access

Adiabatic shear band formation in explosively driven AerMet-100 alloy cylinders

Description: Two differently heat-treated AerMet-100 alloy cylinders were explosively driven to fragmentation. Soft-captured fragments were studied to characterize the deformation and damage induced by high explosive loading. The characterization of the fragments reveals that the dominant failure mechanism appears to be dynamic fracture along adiabatic shear bands. These shear bands differ in size and morphology depending on the heat-treated conditions. Nanoindentation measurements of the adiabatic shear ba… more
Date: February 8, 2006
Creator: Sunwoo, A J; Becker, R; Goto, D M; Orzechowski, T J; Springer, H K; Syn, C K et al.
Partner: UNT Libraries Government Documents Department
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