 Thermal deformation

 
When two materials bonded together expand differently upon heating, the result is deformation. This calc only considers the different thermal expansion, and not the other mechanical parameters (e.g. stiffness) of the system, so gives an upper limit for the deflection.
 
The induced length difference (ΔL) between the two materials can be calculated without entering the CTEs. Note also that is is only necessary to enter either the deflection or the temperature change, and the other is calculated. Representative values of the CTE (coefficient of linear thermal expansion), in ppm/K, include: diamond (1); glass (8.5); steel (10.8); concrete (12); copper (16.5); aluminium (23); PEEK (30); polycarbonate (65); PVC (70), nylon, acrylic (80); PTFE (130); polethylene (200).  