System for Measuring the Dynamic Properties of Materials

TLDR

The system enables detailed study of materials’ response to shock loading under uniaxial strain. The system uses a gas‑gun‑driven flat projectile to impose uniaxial strain, monitors target free‑surface motion with an inclined resistance wire, and timestamps the data to derive dynamic stress‑strain curves.

Abstract

A system is described which facilitates a detailed study of the response of materials to shock loading under conditions of uniaxial strain. The uniaxial strain loading is produced by a flat projectile plate driven into a target plate by a gas gun. The resulting motion of the free surface of the target plate is monitored by the shorting of a resistance wire which is inclined at a slight angle to the free surface. An accurate time base relates the free surface data to the time of impact. The measured free surface motion may be used to determine the dynamic stress-strain behavior of the material.