疲劳裂纹随机扩展模型

疲劳裂纺在扩展过程中有很大分散性，根据不同的来源将这种分散性归为两类：材料固有的内在分散和外、环境等引起的外在分散性。

A Review of Fatigue Crack Stochastical Growth Models

There are a lot of uncertainties in fatigue crack growth. This paper classifies the uncertainties into two kinds. One is inhomogeneity of material which is named internal scatter and another is stochastic property of load, circument, and so on which is called as external scatter. In stochastic propagation models which only consider internal scatters of material, random variety model is the simplest and the most reliabl. When external scatters are considered, loading process is usually regarded as a stationary stochasitic process. For combined models which consider bothinternal and external scatters, there is no any commonly accepted model upto now. This paper systemetically reviews some typical models which wereproposed in the past several decades, and thell comments on these models.