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At the given stage of development of the technics, one of the prominent aspects of preparation of engineers is the modern software applied in educational process. In the given work is considered the problem of a stationary heat transfer and calculation of the thermal pressure arising in the system.
A heat sink is a metal block with fins that sits on top of electronic components to cool them. Set up a steady state heat transfer problem with a single fin 3 mm thick by 20 mm long (and deep in the z-direction) or download the zip file heattransfer.zip.
Fracture can occur because one material is hot and expands locally or because two materials expand differently.
The QuickField file Thermalshock2 has a bar made of two glass zones (actually 3 zones, but two are the same). This should be a plane stress problem with no z-axis stresses because otherwise the expansion will generate z-direction forces. Let us call them zone 1, 2 and 3 left to right. The constraints are x and y at the bottom right and x at the top right vertices.
You can picture this as a thin sheet of glass covering another glass or a metal, perhaps an enamel coating layer like you get on a kitchen stove.