Accession Number:

ADA392414

Title:

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

Descriptive Note:

Final rept. Jan-Mar 1998

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

2001-06-01

Pagination or Media Count:

36.0

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.

Subject Categories:

  • Theoretical Mathematics
  • Armor

Distribution Statement:

APPROVED FOR PUBLIC RELEASE