A life prediction method for aircraft structure based on enveloping life surface

A new concept named aircraft structure enveloping life surface (ASELS) is presented. The ASELS describes the interrelationships between stress level, fatigue life, and calendar life. This may be used to predict the residual life of aircraft structures. The development of the ASELS is described. Furthermore, by combining ASELS with Miner linear cumulative damage theory, a residual life prediction method for aircraft structures under typical environment is established.