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Engineering Sciences
Materials Science
1807
Beginner

Young's Modulus

E=σε=FL0AΔLE = \frac{\sigma}{\varepsilon} = \frac{F L_0}{A \Delta L}

Stiffness of a material—how much stress needed for given strain.

By Thomas Young

Engineering Sciences
Young's Modulus
1807 · Thomas Young
Human Reviewed
84%

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Why it matters: Standard material property for every engineering discipline.

Discoverers: Thomas Young (1807)

What does it mean?

Stiffness of a material—how much stress needed for given strain.

Why should I care?

Standard material property for every engineering discipline.

Equation Compass

North — Prerequisites

West — History

East — Applications

South — Derivations

Variables & Units

SymbolNameUnitMeaning
EEYoung's modulusPaElastic modulus
σσStress—Pa
εεStrain—Dimensionless

Worked Example

Rubber: low E (~MPa); diamond: very high E.

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Sources & further reading

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Young's Modulus

E=σε=FL0AΔLE = \frac{\sigma}{\varepsilon} = \frac{F L_0}{A \Delta L}

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Stiffness of a material—how much stress needed for given strain.

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