2. Mechanical Properties of Aluminum

Try these first

1. 1.

   What is the approximate Young’s Modulus for aluminum?

   Hint

   Compare it to steel's modulus, which is higher.

2. 2.

   Define tensile strength in your own words.

   Hint

   Think about what happens to a rubber band when you stretch it too much.

3. 3.

   What is the tensile strength of pure aluminum?

   • Around 50 MPa
   • Around 90 MPa
   • Around 150 MPa

   Hint

   Refer back to our discussion on pure aluminum's properties.

4. 4.

   Is aluminum’s Young’s Modulus greater than that of steel?

   • True
   • False

   Hint

   Think about how materials bend under the same load.

5. 5.

   Given the tensile strengths of two aluminum alloys, A (200 MPa) and B (300 MPa), calculate the percentage increase in strength when moving from A to B. Discuss the implications for construction.

   Hint

   Use the percentage change formula.

6. 6.

   An aluminum beam is subjected to cyclic loading that approaches its fatigue strength of 150 MPa. If the beam has a yield strength of 250 MPa, discuss the engineering considerations that must be taken into account to ensure safety.

   Hint

   Consider the difference between yield strength and fatigue strength when concerning structural durability.