Determine the free-end displacements and the element stresses for the plate discretized into four triangular elements and subjected to the tensile forces shown in Figure P7-12. Compare your results to the solution given in Section 6.5. Why are these results different? Let E = 30 × 106 psi, = 0.30, and t = 1 in.

Figure P7-12

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5000 lb 10'in. 5000 Ib 20 in.-