Solve for the axial displacement and stress in the tapered bar shown in Figure P3–12 usi...

Solve for the axial displacement and stress in the tapered bar shown in Figure P3–12 using one and then two constant-area elements. Evaluate the area at the center of each element length. Use that area for each element. Let A₀ = 2 in² , L = 20 in., E = 10 10⁶ psi, and P = 1000 lb. Compare your finite element solutions with the exact solution.