Determine the nodal displacements and the element stresses, including principal stresses, due to the loads shown for the thin plates in Figure P6-15 on the next page. Use E = 30 × 106 psi, v = 0.30, and t = 0.25 inches. Assume plane stress conditions apply. The recommended discretized plates are shown in the figures. Use a computer program to solve these.

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4500 lb 10 in. 4 in. 4500 lb 30° 20 in. 4 in. (b) (a) 9000 lb Pr= 1500 psi 16 in. 16 in. 16 in. 7000 Ib /- 16 in. (d) (c) 2.