An Analysis of Parameters for the Johnson-Cook Strength Model for 2-in-Thick Rolled Homogeneous Armor

Abstract

Yield strength obtained from quasi-static strength data for rolled homogeneous armor (RHA) was combined with dynamic strength data for 2-in (51-mm) RHA to generate Johnson-Cook parameters for 2-in RHA. One parameter was fixed based on the quasi-static strength data, and a least-squares method was used to fit the others individually. The fit was tested with CHT by simulating the penetration of stacks of 2.5-in-thick (63.5-mm) RHA plates (the closest available experimental data). Parameter analysis and comparison of the simulations to experiment substantiated the approach.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADA392414

Entities

People

  • David S. Kleponis
  • Hubert W. Meyer Jr.

Organizations

  • United States Army Research Laboratory

Tags

DTIC Thesaurus Topics

  • Armor
  • Data Sets
  • Department Of Defense
  • Digital Data
  • Dynamic Tests
  • Equations
  • Hardening
  • Hardness
  • High Performance Computing
  • Least Squares Method
  • Materials
  • Military Research
  • Rolled Homogeneous Armor
  • Strain Hardening
  • Strain Rate
  • Thickness
  • Yield Strength

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