Tip for Problem 4

During the sheet metal practica you made a bowl. Describe what you did using proper terminology. Would it be possible to make the same bowl using a steel alloy with an ultimate tensile strength of 50ksi and a yield strength of 30ksi? Assume the sheet was 0.010" thick and that the disk was 4.00" in diameter.

To help you prepare the answer consider the following.

• The press has a maximum load of 150,000 lbs
• Which material property is relevant ultimate tensile stress or yield stress?
• 1ksi = 1000 lbs/square-inch
• Use your notes, the in-class-problems and other class resources,