Stress-strain with the deformation?
An aluminum bar has a length L = 4 m and a diameter d = 1.0 in. The stress-strain curve for aluminum are shown below. The first part of the right of the curve has a slope (modulus) of 10×10 ^ 6 psi. The bar is loaded by tensile forces P = £ 24,000 and then download. What are the following: A) What is the permanent deformation of the bar? B) If the bar is reloaded As to the limit proportionality? Here the stress-strain curve of aluminum: http://img186.imageshack.us/img186/5519/143fl5. jpg
Location Bar (A) x pi = D ^ 2 / 4 = 3141 x 1.0 ^ 2 / 4 = 0.785in2 stress in the bar = P / A = 24 000 / 0785 = 30 573 psi = 30.6 ksi, the graph of voltage (E) 30.6 ksi seems to be constrained = 0.03 = set / original length, so set = 0.03 x 4 = Not sure 0.12ft Part B
Crushing a 12″ Tube Down to 1.5″
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