Creep rate induced by surface diffusion of porous media

• The creep rate is induced by surface diffusion of porous.
• The creep rate is controlled by the morphology of porous.
• The creep rate depends on the strain energy and surface energy.

Holes in materials can cause improved or unique performance of the material when the sizes, shapes, and orientation of holes as well as grains are controlled in materials. In the paper, a computational method for creep rate induced by hole surface diffusion of porous materials is presented. The driven force for diffusional mass transport along the hole surface is the surface diffusion energy of hole and the strain energy acting on the surface, which is obtained from rigorous elastic theory. In order to apply the present solution to the realistic porous materials the scale effect is considered by using finite element method based on two-dimensional unit cell for porous materials under uniaxial tension.

An analytical method is presented to describe the creep rate solely induced by the hole surface diffusion of porous materials, and the scale effect is considered by using finite element method.Figure optionsDownload as PowerPoint slide