8. Consider a two-bar structure in the figure with Young's modulus E = 100GPa, yield stress ay = 250MPa, and F = 10,000N. Design variables are bi = area of section AB and bi =

area of section BC. Starting from the initial design of b\ = 1 x 10~4 m2 and bi = 2 x 10~4 m2, perform the fully stressed design to obtain minimum cross-sectional areas.

ABC

>Rr