What primary factors are considered in fatigue life assessment of aircraft structures?

In the fatigue life assessment of aircraft structures, the primary factors that are considered include load cycles, stress levels, and materials used.

Load cycles refer to the number of times an aircraft experiences different load conditions during operation, which is critical in determining how often the structure undergoes stress and potential fatigue. Stress levels indicate the magnitude and type of loads acting on the aircraft components. Different stresses can lead to different fatigue behaviors in materials. The materials used in the aircraft structure are also crucial because different materials have varying fatigue resistance characteristics, which can significantly impact the overall lifespan of the component or structure.

By examining these factors, engineers can predict how long an aircraft structure can safely operate before the risk of failure due to fatigue becomes significant. This helps in ensuring safety and reliability in aviation while also informing maintenance schedules and operational guidelines.