## Solution to Problem 204 Stress-strain Diagram

Problem 204
The following data were obtained during a tension test of an aluminum alloy. The initial diameter of the test specimen was 0.505 in. and the gage length was 2.0 in.

 Load (lb) Elongation (in.) Load (lb) Elongation (in.) 0 0 14 000 0.020 2 310 0.00220 14 400 0.025 4 640 0.00440 14 500 0.060 6 950 0.00660 14 600 0.080 9 290 0.00880 14 800 0.100 11 600 0.0110 14 600 0.120 12 600 0.0150 13 600 Fracture

Plot the stress-strain diagram and determine the following mechanical properties: (a) proportional limit; (b) modulus of elasticity; (c) yield point; (d) yield strength at 0.2% offset; (e) ultimate strength; and (f) rupture strength.

## Solution to Problem 203 Stress-strain Diagram

Problem 203
The following data were recorded during the tensile test of a 14-mm-diameter mild steel rod. The gage length was 50 mm.

 Load (N) Elongation (mm) Load (N) Elongation (mm) 0 0 46 200 1.25 6 310 0.010 52 400 2.50 12 600 0.020 58 500 4.50 18 800 0.030 68 000 7.50 25 100 0.040 59 000 12.5 31 300 0.050 67 800 15.5 37 900 0.060 65 000 20.0 40 100 0.163 65 500 Fracture 41 600 0.433

Plot the stress-strain diagram and determine the following mechanical properties: (a) proportional limits; (b) modulus of elasticity; (c) yield point; (d) ultimate strength; and (e) rupture strength.