Microstructural fracture mechanics in high-cycle fatigue

被引：0
|
作者：
de los Rios, ER [1 ]
Navarro, A [1 ]
机构：
[1] Univ Sheffield, Dept Mech Engn, Sheffield S1 3JD, S Yorkshire, England
来源：
HIGH CYCLE FATIGUE OF STRUCTURAL MATERIALS | 1997年
关键词：
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Microstructural Fracture Mechanics principles are used to develop a model of crack growth in long life fatigue. In its simplest form microstructural modelling considers the material as a polycrystal of uniform grain size D, with a crack system divided into three zones: the crack, the plastic zone and the microstructural barrier zone. The solution of the equilibrium equation allows for the calculation of the stresses sustained by the crack wake, plastic zone, barrier zone and elastic enclave, and the crack tip plastic displacement phi. Crack growth rate is calculated through a Paris type relationship in terms of phi, i.e. da / dN = C phi(n). Conditions for crack arrest and instability are established.
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页码：157 / 166
页数：10
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