P5 (FEA)Ans:d) 0.0055098in, -0.0255027in, f) $|\sigma_1|$=1262.67psi, $|\sigma_2|$=186.59psi, $|\sigma_3|$=1823.19psi, $|\sigma_4|$=2358.27psi
A rigid truss is pinned at nodes: 2, 3, 4, 5, and is loaded at node 1 as shown.
a) set-up and display element stiffness matrices for each element of the truss,
b) assemble and display global stiffness matrix system,
c) list and apply boundary conditions and display the reduced global system,
d) solve for the two nodal displacements of node 1,
e) solve for the eight reactions in nodes 2, 3, 4 and 5,
f) solve for internal forces and axial stresses in each element.
(indicate C or T in your solution)
Given: $E = 2.75 \cdot 10^6 psi$, $v = 0.29$,
$A_1 = 0.50in^2$, $A_2 = 0.375in^2$, $A_3 = 0.25in^2$, $A_4 = 0.125in^2$.
