Question

5) Propose a cross-section (with dimensions) of a bar that has the same length, material, and cross-section area (as a number not shape) as the provided bar, with double the applied load (Torque), but has lower stress value than what you got.

Using the equations given in the handout and lecture notes, you are asked to come up with a different cross-section shape that has the same length, material, and cross-section area (e.g. if the one you have is 10 mm², the new cross-section area should be also 10 mm²). In addition, it should handle double the max applied torque that you have and get less stress value than what you have originally.

Answer 1

Title - Torsion Formula

Conclusion - Torsion formula is used for calculations of shear stress acting on a bar. Here the proposal was to maintain same cross sectional area while concluding the value of shear stress lower than previous sections for the double value of Torque acting. As per the proposals conditions required equations have been found out. Substitute values of diameters and reach to the values of required components.

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