2.5. Fatigue Strength

Try these first

1. 1.

   What is fatigue strength?

   Hint

   Think about how materials behave under stress.

2. 2.

   Name one reason aluminum has lower fatigue strength than steel.

   Hint

   Consider the differences in material properties.

3. 3.

   What does fatigue strength measure?

   • The weight of the material
   • Resistance to repeated loading
   • Thermal conductivity

   Hint

   Think about repeated applications of force.

4. 4.

   True or False: Aluminum has a clear fatigue limit like many steels.

   • True
   • False

   Hint

   Reflect on aluminum's unique properties.

5. 5.

   A newly designed pedestrian bridge uses aluminum framing extensively. What engineering strategies should be taken to mitigate fatigue issues? Please provide at least three.

   Hint

   Think about both material choices and design innovations.

6. 6.

   During testing, a component made of aluminum shows signs of distress after 100,000 load cycles. Outline the steps an engineer should take to evaluate potential fatigue failure.

   Hint

   Consider how each aspect impacts long-term reliability.