please solve it The stressstrain plots for two the 20 marks

please solve it

The stress-strain plots for two the (20 marks) metallic materials, Material A and Material B, are shown below specimens from the two materials were tested until failure. Using the (1) The ultimate stress for each material (2) Calculate the Elastic modulus for each material (3) Which material is more ductile? Why? Stress (MPa) 20 10 Material B 0.01 0.02 0.03 0.04 0.05 0.06 0.07 Strain (%)

Solution

(1) Answer:- Ultimate stress of material A = 30 MPa

Ultimate stress of material B = 15 MPa

(2) Answer:-

Elastic modulus of material A = Stress/strain = 25/(0.0004) = 6.25 *10⁴ MPa

Elastic modulus of material B = 15/(0.0005) = 3 *10⁴ MPa

(3) Answer:- Material A is more ductile than material B. Because end strain of material A is greater than end strain of material B .