Accession Number : ADA338751

Title :   Numerical Study of Stress Concentrators in Impact Shearing

Descriptive Note : Final rept.

Corporate Author : METZ UNIV (FRANCE) LAB OF PHYSICS AND MECHANICS OF MATERIALS

Personal Author(s) : Klosak, M. ; Klepaczko, J. R.

PDF Url : ADA338751

Report Date : 1998

Pagination or Media Count : 28

Abstract : This Appendix contains complete results of numerical calculations by FE code ABAQUS/Explicit for four geometries of a shear layer with different stress concentrators. All calculations have been performed for VAR 4340 steel with hardness 50 HRC. Several shear velocities have been assumed, from 10 m/s to 150 m/s. Because of thermal coupling the local heating around a stress concentrator leads to failure due to carrying capacity of the material. Two local failure criteria have been introduced into the numerical scheme. The first one is based on the maximum inelastic deformation in the adiabatic conditions, and the second one on the concept of the strain energy density, also in the adiabatic case. Both criteria give similar results concerning the failure patterns. A general conclusion can be reached that during impact shearing the failure is more sensitive to the adiabatic stress concentrators at higher impact velocities. The final results are given in the form of graphs and tables.

Descriptors :   *HIGH STRENGTH ALLOYS, NUMERICAL ANALYSIS, HEAT TREATMENT, SHEAR STRESSES, FRANCE, PLASTIC PROPERTIES, FAILURE(MECHANICS), ADIABATIC CONDITIONS, STRESS CONCENTRATION, SHEAR TESTS.

Subject Categories : Properties of Metals and Alloys
      Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE