Over time, when a metallic glass is put under stress, its atoms will shift, slide and ultimately form bands that leave the material more prone to breaking. Rice University scientists have developed new computational methods based on a general theory of glasses to explain why.
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Dynamical Theory of Shear Bands in Structural Glasses. This movie illustrates a two-dimensional simulation by Rice University scientists of deformation fields in the Vitreloy 1 model under the applied strain rate of 0.01 1/s. The ambient temperature is 643 K. The upper plot shows the equivalent stress on the glass in unit of megapascals and the lower plot shows the fictive temperature (at which glass is effectively frozen) in Kelvin. Each plot is overlaid with the strain field. Credit: Apiwat Wisitsorasak/ King Mongkut University of Technology