In its Martensitic State, a NiTiNOL wire is of diameter 0.5 mm and length 10 cm.

a). The wire is given an initial strain of 2% at a temperature below Mf and its ends are rigidly fixed. What force will be developed in the wire when it is heated to a temperature above Af.

b). The cycle of part A is repeated but this time the wire is restrained by a spring of stiffness k = 5000 N/m. Find the displacement of the spring and the strain and force in the wire after heating. E _A = 59 GPa.

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Given data Diameter of the NiTiNOL wire d 05 mm Length of the NiTiNOL wi... View the full answer