Abstract:

In this paper, a crack initiation metho . for durability analysis is developed. The method connected the reliability of safe life under load spectrum with the crack exceedance probability on the basis of P-S-N curves for structure members crack initiation, the condition is that the crack length reaches economic repairment limit. And the P(i,τ)-τ curves of every stress region are established. Then the structure damage degree is evaluated and the structure economic life is predicted. Finally, a simple example is given.

Key words: durability analysis, crack initiation, economic life