Research Article

Deformation of a Circular Elastic Tube between Two Parallel Bars: Quasi-Analytical Geometrical Ring Models

Figure 1

Illustration of a deformable ring (light grey) with constant wall thickness compressed between two parallel bars (dark grey) of length . The internal central ring height yields twice the minor axis and the internal central width yields twice the major axis . The parallel bars are spaced by with for nonbuckled rings and for buckled rings. (a) Circular ( and ) ring with internal perimeter (internal diameter ) and (b) elongated ring ( and ).
(a) Circular
(b) Pinched