cumulative damage
1.Markov chain models of cumulative damage have been provided a comprehensive descriptions of cumulative damage processes.
2.This paper studies the relation of several statistical characteristics of ther andom stress and load of carcase, the carcase, the speed and the pavement quality,by means of random stress experiment of bus carcase with six points of large stressunder different work state, and calculates the fatigue age of carcase according to the theory of cumulative damage in fatigue.
3.In this paper, it is assumed that same corrosion damage corresponding with the same fatigue property. Based above the viewpoint, the relationships of structural fatigue life and calendar service life under corrosion environment medium are studied based on tests and analysis, the relationships of structural Detail Fatigue Rating ( DFR ) and ground expose time T (in airs) is given. On the basis of Miner linear cumulative damage theory, a new method of calculating aircraft structural calendar life under corrosion environment is presented.
4.First of all, the whole damage field curves with toughness that selected as the fatigue damage variable was measured, then on the basis of frame of nonlinear continuum fatigue damage theory, the expressive form of fatigue damage parameter was decided by means of the tested curve data, and a new nonlinear fatigue damage cumulative model was proposed.
