True-Triaxial-Cell Set up to Estimate the Stress Induced Anisotropy: Uniformity Study

Abstract

The stress anisotropy in Polymethyl Methacrylate (PMMA) subjected to triaxial stress has been investigated using True Triaxial Cell. True Triaxial Cell with 4 sealed S wave transducers inside each actuators facilitates the wave velocities measurement in different set of stresses. 108 positions of measurements have been selected and comprehensive test sequences has been allocated. The experiment analysis results confirm that the wave velocities increasing by increasing the stress in all sequences on different rates. Moreover, this experiment shows the designed True Triaxial Cell operates symmetrically and the results in both sets of transducers show a good correlation to one another which confirms the uniformity of applied stresses.