P1. A notched member has an elastic stress concentration of k = 2.50 and is made of a material with an elastic, linear-hardening stress-strain curve with E = 70 GPa, = 500 MPa and 8 = 0.15. The member is loaded from zero to a nominal stress S = 272 MPa. (a) Determine the local notch stress and strain. (b) Determine the residual stress and strain after removal of S. (c) Plot the stress-strain response. Answers: (0.011991 mm/mm), (551 MPa), (0.002276 mm/mm), (-129 MPa)