The nitial surface is the same as in the previous example with the lower (not interesting) part sunk into the marble base.

Now the front and back face is artificially breaked by introducing 19 degenerate zero-width horizontal facets (breaking lines) equally spaced between the optimal height sqrt(42) - 5 = 1.4807... and the top level 1.9.

Preliminary simulations obtained with the Allen-Cahn approach are gathered here.

The subsequent evolution tends to widen all these strips, signalling that this evolution is energetically better than the previous one.

This is the situation at time 0.0025:

As in the previous example the bending is emphasized by changing the depht of the front facets according to depth := 10*depth - 9. and similarly for the back facets.

Here are the results at times 0.005, 0.0075, 0.01, 0.0125: