Base number of stress cycles

stress cycles;

stress cycles.

2.3.3. Determine the service life in hours for the gearing:

t = L · 365 · K_a · 24 · K_d,

where L is the service life in years; K_a is the annual utilization factor that takes into account use of the gearing during a year; K_d is the daily utilization factor that takes into account use of the gearing for 24 hours. These parameters should be given in the specification for the term paper.

In our case the service life of the gearing is 7 years, K_a = 0.5, K_d =0.3

.

2.3.4. Determine the design number of stress cycles for the pinion and the gear.

Table 2.2