Physics

Thermal Stress Calculator

Find the stress from a constrained temperature change.

Calculated Output

Thermal stress (MPa) 120

Formula: σ = E·α·ΔT

Step-by-Step Breakdown

1. Values used:

2. Young's modulus = 200 GPa

3. Expansion coefficient = 0 1/K

4. Temperature change = 50 K

6. Thermal stress = 120MPa

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The math behind it

σ = E·α·ΔT. Steel rails and bridges add gaps to relieve this stress.

Steel (E 200 GPa, α 12×10⁻⁶), ΔT 50 K → 120 MPa.

Why do bridges have expansion joints?

To let parts expand without building up damaging thermal stress.