7.1. Tensile Test

Try these first

1. 1.

   What does a tensile test measure?

   Hint

   Think about what happens to materials when they are stretched.

2. 2.

   What does percentage elongation indicate?

   Hint

   Higher values suggest more stretching.

3. 3.

   What is the primary purpose of a tensile test?

   • To measure compressive strength
   • To measure tensile strength
   • To measure impact resistance

   Hint

   Think about the type of forces the test subjects the material to.

4. 4.

   Is yield strength a measure of material plastically deformed?

   • True
   • False

   Hint

   Recall what happens when a material exceeds its yield strength.

5. 5.

   A tensile test on a metal sample results in a yield stress of 250 MPa and an ultimate tensile strength of 400 MPa. If an application requires a safety factor of 2, what is the maximum allowable working stress for the material?

   Hint

   Divide the yield strength by the safety factor to find the working stress.

6. 6.

   Why is it important for materials used in construction to have both high strength and good ductility? Provide an example.

   Hint

   Consider how a failure would affect a structure's safety.