Accession Number:

ADA413347

Title:

Experimental Characterization and Modeling of Damage in Composites Under Ballistic Impact

Descriptive Note:

Final rept. Apr 1999-Mar 2003, 1 Apr 1999-31 Oct 2002

Corporate Author:

FLORIDA AGRICULTURAL AND MECHANICAL UNIV TALLAHASSEE DIV OF SPONSORED RESEARCH

Personal Author(s):

Report Date:

2003-03-01

Pagination or Media Count:

121.0

Abstract:

The primary focus of our research is to understand the ballistic behavior of composites. It is shown that the shock response of composites is quite different from that of the metals, and the presence of heterogeneous interfaces in composites can be attributed to this fact. The interfaces cause multiple scattering, and the magnitude of scattering depends on the level of heterogeneity as indicated by impedance mismatch. In this research work we have developed an analytical model for the plate impact of a bilaminate material system by considering explicitly material heterogeneity and the equation of state. Comparison of the model with experimental data and numerical results show good agreement. Further, a comprehensive analysis of cohesive zone models has been carried out to study its applicability to represent damage and fracture from a micromechanical perspectives. Thus cohesive zone models can be used within the framework of continuum mechanics to analyze damage in the composites under ballistic loading conditions.

Subject Categories:

  • Laminates and Composite Materials
  • Operations Research
  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE