Accession Number : ADP006593

Title :   Analysis of Shear Banding in Armco IF Iron, Tungsten Alloy and Depleted Uranium,

Corporate Author : MISSOURI UNIV-ROLLA

Personal Author(s) : Barta, R. C. ; Kim, C. H.

Report Date : MAR 1992

Pagination or Media Count : 15

Abstract : We study the problem of the initiation and growth of shear bands in three materials by analyzing the thermomechanical deformations of a block of nonuniform thickness undergoing overall simple shearing deformations. Each of these materials is assumed to obey the Johnson-Cook law. It is found that, for each material, the deformations of the block have become nonhomogeneous by the time the shear stress attains its maximum value. For Armco IF iron, a narrow band at the center develops when the shear stress there has dropped to 85% of its peak value, and the same occurs for the tungsten alloy when the shear stress at the specimen center equals 80% of the maximum value. For the depleted uranium satisfactory results could be computed only till the shear stress dropped to 99% of the peak value.

Descriptors :   *TUNGSTEN ALLOYS, *IRON ALLOYS, *FORGING, *THERMOMECHANICS, *SHEAR PROPERTIES, ALLOYS, DEFORMATION, DEPLETED URANIUM, IRON, MATERIALS, NONUNIFORM, PEAK VALUES, THICKNESS, TIME, TUNGSTEN, URANIUM, VALUE.

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE