The figure shows a schematic drawing of a vehicular jack that is to be designed

Question

The figure shows a schematic drawing of a vehicular jack that is to be designed to support a maximum mass of 300 leg based on the use of a design factor nd = 3.50. The opposite-handed threads on the two ends of the screw are cut to allow the link angle 0 to vary from 15 to 70. The links are to be machined from AISI 1010 hot-rolled steel bare. Each of the four links is to consist of two bars, one on each side of the central bearings. The bars are to be 350 mm long and have a bar width of w = 30 mm. The pinned ends are to be designed to secure an end-condition constant of at least C = 1.4 for out-of-plane buckling. Find a suitable preferred thickness and the resulting factor of safety for this thickness.

Explanation / Answer

The figure shows a schematic drawing of a vehicular jack that is to be designed

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