Question

You have a task of designing an aluminum rod that needs to withstand a tensile force of 45,000 lbf. To ensure a sufficient safety, the maximum allowable stress on the rod is limited to 25,000 psi. The rod must be at least 150 in. long, but must deform elastically no more than 0.25 in when the force is applied. The typical elastic modulus for aluminum is about 1×107 psi. What is the range of the diameter?

Answer 1