Study of the Influences of Transient Crack Propagation in a Pinion on Time-Varying Mesh Stiffness

Figure 5

The influences of TPOC with different lengths but the same propagation model on mesh stiffness. , , , and represent the crack propagating with the model of a step function, which indicates that the crack has instantaneously propagated by a tiny length. The corresponding lengths are 0.05, 0.1, 0.15, and 0.2 mm. represents the absence of TPOC.

(a) Case  1 ()

(b) Case  2 ()

(c) Case  3 ( and )

(d) Case  4 ( and )