8.5 - where is the material property of viscosity. As we...

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Glass Solidification Behavior & Glass Deformation Mechanisms Crystalline materials deform by the motion of dislocations. Noncrystalline materials deform by viscous flow, the same type of deformation found in liquids. With applied stress, groups of atoms slide past each other. Viscous flow is characterized by this equation: τ = η dv/dy
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Unformatted text preview: where is the material property of viscosity. As we can see from this equation, viscosity is the proportionality constant between the applied shear stress and the velocity gradient. The units of viscosity are poises (P) or Pascal-seconds (Pa-sec): 1P = 0.1 Pa-sec (Note: is the reciprocal of the material property of fluidity.)...
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This note was uploaded on 08/10/2009 for the course ENGN 45 taught by Professor Wendy during the Spring '09 term at City College of San Francisco.

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