The following data were obtained during a tensile test on a mild steel specimen having an initial diameter of 0.505 inch. At failure, the reduced diameter of the specimen was 0.305 inch. Plot the data, and determine the following:
a. Modulus of elasticity.
b. Proportional limit.
c. Ultimate strength.
d. Percentage reduction in area.
e. Percentage elongation.
f. Indicated strength at rupture.
g. True rupture strength.
| Axial\space Load (\#) | Stress \space f (\#/in.^2) | Elongation \space per \space 2^{\prime \prime } \space Length \space (in.) | Strain \space \delta /L \space (in./in.) |
| 0 | 0 | 0 | 0 |
| 1,640 | 8,200 | .00050 | .00025 |
| 3,140 | 15,700 | .0010 | .00050 |
| 4,580 | 22,900 | .0015 | .00075 |
| 6,000 | 30,000 | .0020 | .00100 |
| 7,440 | 37,200 | .0025 | .00125 |
| 8,000 | 40,000 | .0030 | .00150 |
| 7,980 | 39,900 | .00375 | .001875 |
| 7,900 | 39,500 | .00500 | .00250 |
| 8,040 | 40,200 | .00624 | .00312 |
| 8,040 | 40,200 | .00938 | .00469 |
| 8,060 | 40,300 | .0125 | .00625 |
| 9,460 | 47,300 | .050 | .0250 |
| 12,000 | 60,000 | .125 | .0625 |
| 13,260 | 66,300 | .225 | .1125 |
| 13,580 | 67,900 | .325 | .1625 |
| 13,460 | 67,300 | .475 | .2375 |
| 13,220 | 66,100 | .535 | .2675 |
| 9,860 | 49,300 | .625 | .3125 |
