(Solved): (5) An elastoplastic material has the stress-strain relation as shown in the following figure. The m ...

(5) An elastoplastic material has the stress-strain relation as shown in the following figure. The modulus of elasticity is 25x106 psi, yield strength is 60 ksi, and it is further loaded up to 75 ksis and the slope of then second portion (beyond 60 ksi) of the stress-strain diagram is 3x106 psi. Slope = 3x106 psi Stress (6) Define the following terms: (i) strain hardening, (ii) strain softening, (iii) modulus of resilience, Strain (a) Is this a behavior of strain hardening or strain softening? Justify your answer and provide an example of such behavior (b) Calculate the total strain that corresponds to a stress of 75 ksi. (c) If the 75-ksi stress is removed, calculate the elastic strain and permanent strain. (iv) endurance limit, (v) creep, (vi) relaxation (vii) modulus of toughness, (viii) precision and bias, (ix) factor of safety, and (x) sustainability Slope 25x106 psi