Design Questions Set 2:
What is the specification for a rivet?
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Find the type of weld joint, the following diagram is representing?
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What happens if the minimum required load is not maintained on a bearing?
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What is Shear stress energy theory also known as?
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The formula used to calculate oil-film thickness in hydrodynamic bearings is:
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What will be the endurance limit for a stress range of 0.75? The endurance limit for the completely reversed stress is 625 MPa.
Solution:
An element at the critical section of the component under the stress conditions having two principal stresses σx = 0 MPa and σy = 40 Mpa, τxy = 45MPa, and Syt=100 Mpa. Check whether an element is safe or not.
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Calculate the factor of safety based on the maximum shear stress theory if the elastic limit of a circular bar, subjected to an axial force and shear force, is 330 MPa. The difference between the two principal stresses is 110 MPa.
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In a longitudinal butt joint, the pitch and diameter of rivets are 120 mm and 20 mm respectively. Calculate the thickness of the strap required, if the thickness of the plate is 25 mm. (Assume the straps are of equal length).
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A particular section of a steel shaft is subjected to a maximum bending stress of 160 MPa and a maximum shear stress of 60 MPa. The yield point in tension of the material is 400 MPa. Using the maximum principal stress theory, the factor of safety (FOS) will be:
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