Question: In Problem, determine the strength coefficient and the strain-hardening exponent in the flow curve equation. Be sure not to use data after the point at which necking occurred.
Problem: During a tensile test in which the starting gage length =125.0 mm and the cross-sectional area = 62.5 mm2, the following force and gage length data are collected:
(1) 17,793 N at 125.23 mm,
(2) 23,042 N at 131.25 mm.
(3) 27.579 N at 140.05 mm.
(4) 1 28. 913 N
(a) Plot the engineering stress-strain curve.
(b) yield strength,
(c) modulus of elasticity,
(d) tensile. strength.