Elasticity
| Material | Young's Modulus (lb/in.2) |
|---|---|
| Aluminum | 9.8 x 106 |
| Brass | 13.0 x 106 |
| Gold | 11.4 x 106 |
| Iron (cast) | 13.0 x 106 |
| Platinum | 24.4 x 106 |
| Silver | 11.2 x 106 |
| Steel | 29.0 x 106 |
Young's modulus (Y) for a given material can be found in any good reference work on material characteristics.
Young's modulus for several common materials is given in the table at right. When the length of a test specimen changes (axial strain), the cross-sectional area of the test specimen also changes.
If the change in diameter is divided by the original diameter, the transverse strain is obtained. This is written mathematically as:
