Engineering Sciences
Materials Science
1678/1807
BeginnerStress-Strain Relationship
Stress equals Young's modulus times strain—in the linear elastic regime.
By Robert Hooke, Thomas Young
Engineering Sciences
Stress-Strain Relationship
1678/1807 · Robert Hooke
Why it matters: Foundation of structural engineering and materials design.
Discoverers: Robert Hooke, Thomas Young (1678/1807)
What does it mean?
Stress equals Young's modulus times strain—in the linear elastic regime.
Why should I care?
Foundation of structural engineering and materials design.
Variables & Units
| Symbol | Name | Unit | Meaning |
|---|---|---|---|
| Stress | Pa | Force per area | |
| Young's modulus | Pa | Stiffness | |
| Strain | — | Deformation ratio |
Worked Example
Steel E ≈ 200 GPa; aluminum ≈ 70 GPa.
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Photo: Unsplash — rocket launch
Stress equals Young's modulus times strain—in the linear elastic regime.
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