The tensile plastic deformation work to fracture is equal to the integral of force over the extension during tensile loading. a. show that when this work is expressed on a unit-volume basis it is equal to the integral of the true stress-true strain curve. b. If true stress and true stain are related through. sigma_t, K(є_T)ⁿ. determine the plastic deformation work i. up to necking and ii. through fracture in terms of the necking and true fracture strains. What material properties lead to a large plastic deformation work to fracture?