Problem 1:

For the bar subjected to the linear varying axial load shown in Figure, deter-

mine the nodal displacements and axial stress distribution using (a)three equal-length

elements and (b) five equal-length elements. Let A = 2 in.² and E = 30 x 106 psi.

Compare the finite element solution with an exact solution.

60 in.

T₁= 10x lb/in.