Dynamics and Elastic Properties of Glassy Metastable States

Dynamics and Elastic Properties of Glassy Metastable States

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By a molecular dynamics (MD) simulation method which ensures the system c6097b1028 will be under hydrostatic pressure, dynamic and elastic properties of glassy metatstable states are investigated.In the MD method, the simulation cell fluctuates not only in volume but also in shape under constant hydrostatic pressure and temperature.As observed in experiments for many glass forming materials, metastable states in our simulation show a sharp increase in mean-square-displacement at certain temperatures TD.Dynamic heterogeneity is pioneer ddj sz dimensions also observed at TD.

Elastic properties are calculated from stress and strain relations obtained from the spontaneous fluctuation of internal stress tensor and simulation cell parameters.Each investigated state shows distinctive dynamics while maintaining solid-like elastic properties.The elastic properties stay intact even above TD.It has been shown that the rigidity and mobility of glassy metastable states are compatible under dynamic heterogeneity.