|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Stress Measurements on Colloidal Crystals and Glasses
||J. Zsolt Terdik, David A. Weitz, Frans Spaepen
|On-Site Speaker (Planned)
Colloidal glasses, consisting of micron-size solid spheres suspended in a liquid, have been used to study the mechanisms of glass deformation by tracking the particles in space and time with confocal microscopy. So far, it has been possible only to make strain measurements, based on the relative displacements of the particles . We have now developed a method, similar to traction force microscopy, to measure the overall stress in the glass by tracking the elastic deformation of a gel substrate of known stiffness during the deformation. This technique can be used to determine stress-strain curves, to identify yield points, and to study stress relaxation. Simultaneous access to the motion of all the particles then makes it possible to link the macroscopic mechanical behavior directly to local particle rearrangements. Application of the technique to the deformation of a polycrystalline sample will be shown for comparison.
||Planned: Supplemental Proceedings volume