STUDIES OF MATERIAL CONSTITUTIVE BEHAVIOR USING PERTURBATION GROWTH IN EXPLOSIVE AND MAGNETICALLY DRIVEN LINER SYSTEMS

摘要

This paper discusses a collaborative research program aimed at the development of improved constitutive modeling capability; in particular, the development of a model that is validated over a wide range of strain rate (from quasistatic to 106 s–1). This program includes experimental, theoretical, and numerical components. The experimental part of the program includes both planar and cylindrical manifestations of the perturbation growth method. The theoretical part of the program is focused on the development of a model that possesses all the necessary physics and is at the same time compatible with standard numerical methods for solving the governing field equations. The numerical part of the program is focused on model implementation (into an appropriate continuum mechanics code) and validation. All three parts of the program are coupled. This paper will discuss the experimental program, the development of a new model, and show some results comparing various model predictions to experimental data.