Which material will result in the lightest member

Reference no: EM13546710

A structural tension member of 10 ft. long with a square cross-section is subjected to a load of 120,000 lb. There is a choice between an aluminum alloy and structural steel, with the following information given for each.

Aluminum:

Unit weight (lb/ft^3) 165

ultimate strength (psi) 45,000

modulus of elasticity (psi) 10.5*10^6

cost per lb $0.45

Steel:

Unit weight (lb/ft^3) 490

ultimate strength (psi) 90,000

modulus of elasticity (psi) 30*10^6

cost per lb $0.21

A) Which material will be cheaper if you want a factor of safety of 5? (F.S = ultimate strength/applied stress).

B) Which material will result in the lightest member if you want to limit the elongation to 0.20 in.? Which material will be cheaper under these conditions?

Reference no: EM13546710

Questions Cloud

Prepare companys journal entry to record the notes issuance : Prepare the company's journal entry to record the note's issuance, prepare the journal entries for the first and second installment payments

Prepare a report for the firm ceo indicating : Prepare a report for the firm's CEO indicating which projects should be accepted and why

How does it impacts the accounting equation : How does it impacts the accounting equation. Make sure to identify the two accounts impacted. Why is it important to record your selected transaction?

Determine the expected net realizable value : Determine the expected net realizable value of the accounts receivable as of Dec 31 and journalized the adjusting entry.

Which material will result in the lightest member : Which material will result in the lightest member if you want to limit the elongation to 0.20 in.? Which material will be cheaper under these conditions?

It is more difficult to reduce the air content in uniform : Both grading and plasticity affect the degree of compaction. So, a HIGHER compacted density can be achieved with:

Devise a scheme by which you can measure out exactly 6 liter : The 60mm diameter shaft ABC is supported by two journal bearings, while the 80mm diameter shaft EH is fixed at E and supported by a journal bearing at H. If T1= 2 kN*m and T2= 4 kN*m, determine the angle of twist of gears A and C. The shafts are made..

What would be the new minimum downstream do : A single source of BOD causes an oxygen sag curve with a minimum downstream DO equal to 6.0 mg/L. If the BOD of the waste is doubled (without increasing the waste flow rate),

How might your numerical answers for both c and d vary : Assuming you had the necessary inputs to get a numerical value for both C and D, how might your numerical answers for both C and D vary if the polymer tensile member is located in Michigan versus Texas? Why?

User Account

All Pages