Consider the copper tubes joined below using a "sweated" joint. Use the properties and dimensions given.
(a) Find the total elongation of segment 2-3-4 (δ2-4) for an applied tensile force of P = 5 kN. Use Ec = 120 GPa.
(b) If the yield strength in shear of the tin-lead solder is y = 30 MPa and the tensile yield strength of the copper is σy = 200 MPa, what is the maximum load Pmax that can be applied to the joint if the desired factor of safety in shear is FSτ = 2 and in tension is FSσ = 1.7?
(c) Find the value of L2 at which tube and solder capacities are equal.

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Segment number Sweated joint Solder joints do 18.9 mm 1.25 mm do= 22.2 mm t1.65 mm L3-40 mm L2=L4 = 18 mm Tin-lead solder in space between copper tubes; assume thickness of solder equal zero