Question

Page 5 ofs Question2 (10 pts.) The stress-strain curve for a nonlinear, perfectly elastic material is shown below. A sample of the material is loaded until the stress reaches the value at Point B, after which the sample is unloaded to zero stress. What is the approximate permanent deformation in material? (MPa) 125 100 75ト 50 25 A 5 10 15 20 25 30 35 40 (x 10-4) (A) 0 (B) 0.001 (C) 0.002 (D) 0.003 Support your answers with strong arguments, equations, calculations, diagrams, etc. Question3 (10 pts.) Explain what a S-N curve is and plot a schematic S-N curve for ferrous

Answer 1

냐 125 Mpa 50000 Mpa 3 -4 3 10.00!