2. The measured stress-strain response of a prestressing wire is shown below. Using this plot, develop an appropriate stress-strain function to represent the response of this wire. Load (kips) 15.00 10.00 5.00 diameter = 0.276 in. breaking load = 14.3 kips tensile strength = 240 ksi 0.2% offset stress = 220 ksi E = 29,600 ksi р 0.00 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Elongation (%)