Question

The figure shows a schematic drawing of a vehicular jack that is to be designed to support a maximum mass of 260 kg based on the use of a design factor nd 3.5. The opposite-handed threads on the two ends of the screw are cut to allow the link angle ? to vary from 17 to 75 The links are to be machined from AISI 1010 hot-rolled steel bars. Each of the four links is to consist of two bars, one on each side of the central bearings. The bars are to be 400 mm long and have a bar width ofw 30 mm. The pinned ends are to be designed to secure an end-condition constant of at least C.4 for out-of plane buckling. Find the minimum preferred thickness and the resulting factor of safety for this thickness.

Answer 1