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# Engineering Materials Science Homework Question Im not even sure where to start

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• Engineering Materials Science Homework Question Im not even sure where to start
• ### Engineering Materials Science Homework Question Im not even sure where to start

carmelapa60 > 01-16-2020, 09:08 AM

A rigid bar of weight W 800 lb hangs from three equally spaced wires, two of steel and one of aluminum (the center wire)The diameter of the wires is 1/4 inchBefore they were loaded, all three wires had the same length (L)What temperature increase ΔT in all three wires will result in the entire load being carried by the only the steel wires? Assume the following: Es 30 x 106 psi, αs 6.5 x 10-6/°F, and αa 12 x 10-6/°F.)Thank you so much for all of your help!!!! I really appreciate it!!!!This is only a guess at where to start800lb on 1/4 round rod in tension is a tiny load so ignore elongation through stressBecause the thermal expansion/ contraction co efficient of aluminium is significantly greater than steelWhich I assume you have provided in 12 and 6.5It may be a simultaneous equation or it maybe just a simple ratio I suspect delta t will be minus about 3 to 4 degree F Hope this helps I haven\'t led you astray.Other related question