The square plate in Figure P15 -22 is subjected to uniform heating of 50 °F. Determine the nodal displacements and element stresses. Let the element thickness be t = 0.1 in., E = 30 ×106 psi, v = 0.33, and α = 10 × 10-6 /°F. Then fix the left and right nodes and repeat the problem. Compare answers.

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3 2) 1 in. (1) ly I in. 77 m. 2.