The stress-strain diagram for a bone is shown and can be described by the equation  = 0.45...

The stress-strain diagram for a bone is shown and can be described by the equation  = 0.45(10−6)σ + 0.36( 10−12) σ3 where σ is in kPa. Determine the modulus of toughness and the amount of elongation ofa200-mm-long region just before it fractures if failure occurs at ε = 0.12 mm/mm.