Question

The figure shows the schematic of a vehicular jack which is to be designed to support a load, W. The links are to be made of A36 structural square tubing, w = 20 x 20 x 3 mm. Each link is 400 mm between the centers of the pins, l. Ignore pin holes and stress concentrations. Use nd = 2.$image?w=94&h=96&rev=1&ac=1&parent=1aGPip$

1. (60 pts.) When θ = 20°, determine the greatest allowable load W that can be applied to the jack so that it does not buckle.

2. (10 pts.) Which buckling equation is to be used?

3. (20 pts.) Determine the greatest load that can be applied before it yields.

4. (10 pts.) What is the failure mode (buckling or yielding)?

Answer 1