The formula to calculate Percent Elongation (%EL) is:
\[ \%EL = \frac{(l_f - L_0) \times 100}{L_0} \]
Where:
Percent Elongation is the percentage of plastic strain at fracture.
Fracture Length is the length measured subsequent to fracture and after the two broken ends have been repositioned back together.
Original Length refers to the material's initial size or dimension before any external forces are applied.
Let's assume the following values:
Using the formula:
\[ \%EL = \frac{(l_f - L_0) \times 100}{L_0} \]
Evaluating:
\[ \%EL = \frac{(0.015 - 5) \times 100}{5} \]
The Percent Elongation is -99.7%.
| Fracture Length (m) | Original Length (m) | Percent Elongation (%) |
|---|---|---|
| 0.01 | 1 | -99.0000 |
| 0.01 | 2 | -99.5000 |
| 0.01 | 3 | -99.6667 |
| 0.01 | 4 | -99.7500 |
| 0.01 | 5 | -99.8000 |
| 0.02 | 1 | -98.0000 |
| 0.02 | 2 | -99.0000 |
| 0.02 | 3 | -99.3333 |
| 0.02 | 4 | -99.5000 |
| 0.02 | 5 | -99.6000 |
| 0.03 | 1 | -97.0000 |
| 0.03 | 2 | -98.5000 |
| 0.03 | 3 | -99.0000 |
| 0.03 | 4 | -99.2500 |
| 0.03 | 5 | -99.4000 |
| 0.04 | 1 | -96.0000 |
| 0.04 | 2 | -98.0000 |
| 0.04 | 3 | -98.6667 |
| 0.04 | 4 | -99.0000 |
| 0.04 | 5 | -99.2000 |
| 0.05 | 1 | -95.0000 |
| 0.05 | 2 | -97.5000 |
| 0.05 | 3 | -98.3333 |
| 0.05 | 4 | -98.7500 |
| 0.05 | 5 | -99.0000 |