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Consideration of Moving Tooth Load in Gear Crack Propagation Predictions - January/February 2002

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Archive > 2002 > January/February 2002 > Consideration of Moving Tooth Load in Gear Crack Propagation Predictions

The article "Consideration of Moving Tooth Load in Gear Crack Propagation Predictions" appeared in the January/February 2002 issue of Gear Technology.

Summary
Effective gear designs balance strength, durability, reliability, size, weight, and cost. Even effective designs, however, can have the possibility of gear cracks due to fatigue. In addition, truly robust designs consider not only crack initiation, but also crack propagation trajectories. As an example, crack trajectories that propagate through the gear tooth are the preferred mode of failure compared to propagation through the gear rim. Rim failure will lead to catastrophic events and should be avoided. Analysis tools that predict crack propagation paths can be a valuable aid to the designer to prevent such catastrophic failures.

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