EFFECT OF POROSITY AND STRESS-CONCENTRATION ASSOCIATED WITH PORES ON ELASTIC CREEP BY CRACK-GROWTH IN BRITTLE SOLIDS

被引：8
|
作者：
KRSTIC, VD [1 ]
ERICKSON, WH [1 ]
机构：
[1] ENERGY MINES & RESOURCES CANADA, CANADA CTR MINERALS & ENERGY TECHNOL, PHYS MET RES LABS, OTTAWA, ONTARIO, CANADA
来源：
JOURNAL OF MATERIALS SCIENCE | 1988年 / 23卷 / 11期
关键词：
Fracture Mechanics;
D O I：
10.1007/BF01106842
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The solution for the creep rate of a porous solid as a function of pore volume fraction, pore size and the radial or annular flaw size, is presented. The analysis is based on the concept of crack opening displacement which assumes that the displacement of a solid under stress is solely due to the opening of all radial or annular cracks emanating from the surface of the cavities. It is shown that the strain rate by crack growth is a strong function of pore size and preexisting flaw size. A linear relationship was found to exist between the strain rate by crack growth and the porosity volume fraction.
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页码：4097 / 4102
页数：6
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