Determination of mean and deviatoric stresses in shock loaded solids

Publisher Website
Google Scholar
Abstract
Models for the behavior of solids submitted to shock waves include an equation of state and a plastic yield surface, which represents the plastic potential. The general purpose of this work concerns various methods used to obtain these equations by means of the determination of the mean and deviatoric shock streeses. Emphasis is placed on the method of ’’piezoresistive deviatoric gauges’’ that we have been using since 1973. This method does not include any theoretical hypothesis, and is suitable for all materials that can be gauged. Examples of applications on polymethyl metacrylate, limestone, and steel are reported and show that the precision of the piezoresistive deviatoric gauges method depends upon the material, namely the deviator magnitude, and upon the stress range explored.