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

Figure 5

Illustration of nonbuckled ((a), inner arc curvature is positive) and buckled ((b), inner arc curvature is negative) quarters of peanut rings with center and parameter set . Each ring consists of two arc portions: outer arc (thick gray line) with origin and radius and inner arc (thick black line) with origin and angle . The major axis and minor axis of the peanut are indicated. For the nonbuckled (a) and buckled peanut (b) and hold, respectively.

(a)

(b)