Shape change of a pore in a stressed solid via surface diffusion motivated by surface and elastic energy variation

摘要

When solid is stressed at a high temperature, atoms may move along various paths, causing a pore pre- existing in the solid to change shape. This paper assumes that atoms only diffuse on the pore surface and the solid is elastic. Both surface energy and elastic energy vary as the pore changes shape. When the surface energy variation dominates, the pore evolves to an equilibrium shape close to an ellipse.