Identify two factors that influence fatigue failure in metals. - Leaving Cert Engineering - Question d - 2009

Fatigue failure in metals can be influenced by various factors. Here are two significant ones:

1. Nature and Size of Loading Force: The magnitude and characteristics of the force applied to a metal component can greatly affect its fatigue life. A larger or more complex load can introduce stress concentrations that accelerate fatigue failure.

2. Length of Time Subjected to Loading Force: The duration for which a component is subjected to cyclic loading will also influence its fatigue life. Longer exposure can lead to cumulative damage in the material, making it more susceptible to fatigue failure.