[Problem 2] Select the single item from the pull down menu thatmost closely matc
ID: 1821008 • Letter: #
Question
[Problem 2] Select the single item from the pull down menu thatmost closely matches your answer.
The 6061-T6 Structural Steel bar hasan original length of 25 in. and an original diameter of 7.6in. If an axial load of 1602 kip is applied to the bar,determine the new diameter. Please refer to the table in theback of your textbook for necessary material properties.
A 120 mm x 120 mm x 50 mm thick sheet of copper is stretchedbiaxially as shown. If the normal stress is 40 MPa in the ydirection and the new thickness of the plate in the z direction is49.98 mm, determine the normal stress in the x direction. Copperhas a modulus of elasticity of 110 GPa and a Poisson’s ratioof 0.35.
2.
The 6061-T6 Structural Steel bar hasan original length of 25 in. and an original diameter of 7.6in. If an axial load of 1602 kip is applied to the bar,determine the new diameter. Please refer to the table in theback of your textbook for necessary material properties.
Answer 7.5906 in.7.6094 in.7.5746 in.7.6254 in.6.6607 in.
Explanation / Answer
you will have to look up E for the steel and while you are atit look of Poisssons ration which is usually denoted as v using the calculated elongation and poissions ratio that willgive you the change in the diameter of the rod.For the second one the change in length is due to two thingsthe stress in the y and the x directions you can use superpositionso just add the two. the elongation in the y direction isPL/AE=7.27mm there fore the force in the x direction is compressingit. so it has to be changing the length by 7.25mm set thatequal to PL/AE and solve for p
I am not garunteeing my math on that, but the concept isright. Hope this helps!
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