We owe the T-shirt design and our 2009 contest logo to
Bourdin of LSU Math Department.
It pictures a path of a crack propagating in a brittle
cylinder reinforced in its center by an elastic fiber,
obtained using the Variational Approach to Fracture, computed
on a parallel supercomputer. By varying the relative sizes
and elastic modulii of the fiber and matrices, various
crack geometries can be obtained.