The following data were collected from a 20-mm-dia meter test specimen of a ductile cast iron (l0 = 40.00 mm):

After fracture, the total length was 47.42 mm , and the diameter was 18.35 mm. Plot the engineering stress -strain curve and calculate
(a) The 0. 2% offset yield strength;
(b) The tensile strength;
(c) The modulus of elasticity;
(d) The % elongation;
(e) The % reduction in area;
(f) The engineering stress at fracture;
(g) The true stress at necking; and
(h) The modulus of resilience.

Transcribed Image Text:

Load A/ 0 25.000 50,000 75.000 90,000 105,000 120.000 131.000 125,000 min 0.0000 0.0185 0.0370 0.0555 0.20 0.60 1.56 4.00 (maximum load) 7.52 (fracture