Analysis of Elastic-Plastic Ball Indentation to Measure Strength of High Strength Steels

Abstract

Ball indentation experiments were performed with A723 steel of 1000 to 1200 MPa ultimate strength. Results were compared with conventional tension tests and with an elastic-plastic finite element model of the ball indentation. Finite element analysis showed the ball indentation process to be insensitive to friction effects. Comparison of indentation and conventional tests showed that slip-line field analysis closely predicts the ball contact stress. Indentation tests gave an accurate measure of ultimate tensile strength under the following conditions: using a large ball size and a fixed ratio of indentation depth to ball size; ignoring initial ball contact; accounting for directional material properties; accounting for extraneous system deflections.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1985
Accession Number
ADA159882

Entities

People

  • G. P. O'hara
  • J. J. Zalinka
  • John H. Underwood

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accounting
  • Classification
  • Diameters
  • Displacement
  • Ferrium
  • Finite Element Analysis
  • Hardness
  • Materials
  • Mechanics
  • Military Research
  • Numerical Analysis
  • Regression Analysis
  • Standards
  • Stresses
  • Tensile Strength
  • Test Methods
  • Yield Strength

Readers

  • Computational Modeling and Simulation
  • Mechanical Engineering/Mechanics of Materials.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).