ENGINEERING TOOLS / CTE MISMATCH
CTE mismatch calculator
Estimate differential free expansion between two materials over a specified length and temperature change.
Assumes constant CTE and uniform temperature. This is free movement, not stress, joint strain or fatigue life. Use stack CTE for a clad assembly, not automatically the bare-ceramic value.
Calculation method
Differential movement (µm) = length (mm) × (CTE₁ − CTE₂) (ppm/K) × ΔT (K) ÷ 1000.
How to use the result
Assumes constant CTE and uniform temperature. This is free movement, not stress, joint strain or fatigue life. Use stack CTE for a clad assembly, not automatically the bare-ceramic value.
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