cumulative fatigue damage การใช้

The fatigue life gage is a perfect sensor in monitoring cumulative fatigue damage . the characteristic of fatigue life gage is studied and the fatigue response model is proposed , substantive progress in the application of the sensor
At the same time , a fatigue damage evolution law based on the theory of cumulative fatigue damage is presented , using the electrical resistance of material . and the electrical resistance change is validated by the whole - bend experiments under different stress ranges
In this research , fatigue life of laminate composite is predicted phenomenologically , dealing mainly with in - plane stresses without accounting for out - of - plane failures such as delamination . fatigue modulus is used as a physical parameter which helps to describe the basic fatigue behaviour of unidirectional laminates and obtain expressions for cumulative damages defined by strains . based on some typical fatigue test data for unidirectional composite laminates , a cumulative fatigue damage model is presented for predicting the fatigue life of multidirectional laminates with arbitrary stacking sequence under complicated fatigue loadings
Derived from the elements of the continuum mechanics , the applied fatigue damage mechanics theory system of material is analyzed , and the corresponding rule of cumulative fatigue damage is built up . combined with the applied theory of fatigue damage , a damage mechanics model for high cycle fatigue is deduced