Stability and buckling of flat circular configurations of closed,   intrinsically nonrectilinear filaments spanned by fluid films
  We explore how the stability and buckling behavior of a flexible but inextensible loop spanned by a liquid film in a flat circular configuration is influenced by the intrinsic shape of the fiber from which the loop is made. 
T. M. Hoang and Eliot Fried
cond-mat.soft physics.class-ph