Figure show the stress-strain curve for a given material. What are (a) Young's modulus and (b) approximate yield strength of the material?

Figure show the stress-strain curve for a given material. What are (a)

1.	Figure show the stress-strain curve for a given material. What are (a) Young's modulus and (b) approximate yield strength of the material?
Answer» SOLUTION :a)From the GRAPH, corresponding to point P, Stress = `150 xx 10^(6) N//m^(2), ` Strain = `0.002 = 2 xx 10^(-3)` Young.s MODULUS, `Y = ("stress")/("strain")= (150 xx 10^(6))/(2 xx 10^(-3))=7.5 xx 10^(10) N//m^(2)` b) From graph, corresponding to point B (yield point), stress = `300 xx 10^(6) N//m^(2)`. THUS, approximate yield strength = `2 xx 10^(8) N//m^(2)`.