EVOLUTION OF ROUGHNESS ON THE SURFACE OF A STRAINED ELASTIC MATERIAL DUE TO STRESS-DRIVEN SURFACE DIFFUSION

作     者：L.B.Freund 

作者机构：Division of Engineering Brown University Providence RI 02912 USA 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：1994年第10卷第1期

页      面：16-26页

核心收录：

学科分类：07[理学] 070104[理学-应用数学] 0701[理学-数学] 

主　　题：elastic material surface energy diffusion 

摘      要：The free energy of a stressed crystal is assumed to consist of elastic strain energy and surface energy, and the chemical potential for surface diffusion at constant temperature is obtained under this assumption. A gradient in chemical potential results in diffusive mass transport along the surface. The result is applied in considering the phenomena of instability of a flat surface in a stressed material under fluctuations in surface shape, and the transient evolution of surface roughness due to an initial perturbation in the nearly flat free surface of the material, both under plane strain conditions.