Metric and Imperial Units

The above formulas may be used with both imperial and metric units. As with all calculations care must be taken to keep consistent units throughout with examples of units which should be adopted listed below:

Notation

• σ_c = compressive Stress, psi or MPa
• A = area, in⁴ or mm⁴
• E = modulus of elasticity, psi or MPa
• L = length under consideration, in or mm
• P = resultant pressure, psi or MPa
• ∆_T = change in temperature, ᵒK or ᵒC
• α = coefficient of thermal expansion, ᵒK^-1 or ᵒC^-1

1. R.Hogan. How to calculate Thermal Epansion. US. 2019. Publised in "https://www.isobudgets.com/how-to-calculate-linear-thermal-expansion-for-measurement-uncertainty/".
2. LD Didacting GmbH. Measuring the linear expansion of solids as function of temperature. Germany. Published in "LD Physics Leaflets".