Figure 3From: A Contact Force Model Considering Meshing and Collision States for Dynamic Analysis in Helical Gear SystemRelation between the post- and pre-restitution coefficients: a \(\xi\)c = − 0.022; b \(\xi\)c = 0.521; c \(\xi\)c = 0.723; d \(\xi\)c = 0.941Back to article page