Fatigue Life Calculation Method and Experimental Study of the Multiple Corrugated Diaphragm Coupling

Table 3

Stiffness value of the MCD assemblies before and after the fatigue test.

Part number	Axial stiffness before test (kN/mm)	Axial stiffness after the axial fatigue test (kN/mm)	Relative to the change before the experiment (%)	Axial stiffness after the angular fatigue test (kN/mm)	Relative to the change before the experiment (%)
1	10.198	9.948	2.46	9.522	6.63
2	9.01	8.73	3.10	8.323	7.61