Application of the Integral Theory of Impact to the Qualification of Materials and the Development of a Simplified Rod Penetrator Model
Abstract
The Integral Theory of Impact has been used to evaluate two characteristic properties for many target materials. One property, E*p, represents the energy absorbed during plastic deformation of the target; the other, E*e, represents the absorbed elastic energy. A series of impact tests was conducted in A.R.A.P.'s Impact Facility for each material. The data from these tests are in excellent agreement with the results of computations using the Integral Theory and the properties E*p and E*l. A theory has been developed which relates E*p and E*e to fundamental material properties which can be measured in the laboratory. A rod penetrator model has also been developed using the Integral Theory. The rod is approximated by two cells. The first cell models the deforming region at the leading edge; the second cell models the rigid shaft. Material strengths are incorporated through the 'adiabatic hardness' as measured by E*p. Equations of motion and conservation equations are satisfied in a global sense and are solved numerically. The resulting computations agree well with data. A fundamental experiment has been conducted to measure the partitioning of energy during brittle fracture of a penetrator specimen.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA100152
Entities
People
- Claude V. Swanson
- Ross M. Contiliano
- Thomas B. Mcdonough