Analyzing Model I Crack Problems of Finite Structures Based on Local-Global Analytical Method
Feng Jinhui  Liu Chuntu
（Institute of Mechanics, Chinese Academy of Sciences Beijing 100080)

Abstract: This paper analyzes the mode I crack problems of finite structures based on the
local-global analytical method. The asymptotic expression, a kind of high power   singular element is constructed. It takes place of the crack thick mesh of usual finite element. The size effect of finite structure has been analyzed. The structure thickness and length effect on stress intensity factor have been analyzedin detail.
Keywords: local-global analytical method, finite structure, through thickness crack.