OS13-2-1 How to determine mechanical properties in dynamic compression for light sheet metals in a wide strain-rate range up to 10^6 s^<-1>

Abstract

It is important to evaluate stress-strain relations for many kinds of aerospace materials at high-strain-rate in CAD or CAE of aircraft safety cabins to maintain a survivable environment for passengers and the crew in a crash. However, there are almost no data on mechanical properties of materials at the strain-rate 10^6 s^<-1> or more. Three or four kinds of compression testing systems are used for determining stress-strain curves of commercially pure aluminum: A1100P-H14 [JISH4000] and super duralumin: A2024P-T3 [JISH4000] in a wide strain-rate range up to 10^6 s^<-1>. On the basis of the newly modified Unsteady-Wave-Sensing-System (UWSS), which is composed of a plate impact experiment (PIE) using three in-material stress gauges and nanosecond Lagrangian analyses, various variables are determined at the sensing part of the central gauge.