We have the plane truss shown in Figure 1. The truss carries three forces, as shown in the same figure. Point 1 has a pin support, while point 4 has a horizontal roller support. a) Calculate the support reactions b) Obtain the axial forces of the truss members c) Find the change in length for member 3-4, if the cross-sectional area of that member is 5in? and the elastic modulus for the material is 20,000 ksi 5 kip 10 ft 4 5 kip TAm 10 kip 10 ft 10 ft Figure 1

Cylinders 1 and 2 are glued as shown in the figure. The tensile strength of the glue is 24 MPa, its shear strength is 18 MPa. The glue is evenly distributed over the cylinder with a diameter of 30 mm and an unknown length L. The force F supported by the assembly is 2,600 daN. Calculate the minimum length L to give to the glued joint of the assembly.

The channel shape cross-section and the rectangular cross-section shown in the Figure Q4 are made of materials with elastic-perfectly plastic behaviour. The yield stress of the material used for the channel shape cross-section is oy = 473 MPa, whereas that used for the rectangular cross- section is 0.850y. Compute the thickness of the web, t, of the channel shape section if the two cross sections have identical plastic bending moment about the z-axis. In Figure 4, h= 77 mm, b=46 mm, a=11 mm, H=77 mm, d= 46 mm N b h a + N a | d H

I tried this problem the only way I can think of and I don't know what I could be missing it would be really helpfull if you could show me what I am misssing in my calculations