Elastic postbuckling response of axially-loaded cylindrical shells with seeded geometric imperfection design

Harnessing Seeded Geometric Imperfection to Design Cylindrical Shells With Tunable Elastic Postbuckling Behavior

“…Numerical simulations were conducted using the finite element program ABAQUS [20] following the procedure reported in Ref. [11]. The same geometrical parameters described in the experiments were used for the numerical model.…”

“…1, and demonstrated later in this paper, the approach leads to advantages on other aspects. Further details on the SGI design concept can be found in our previous work [11].…”

“…(1) in Ref. [11]) along with representative buckling modes in terms of a dimensionless axial and circumferential wavenumber. The significance of m-n points in the Koiter circle is that a large number of possible equilibria coexist in the postbuckling regime [19].…”

“…Prior studies by the authors [9][10][11][12] have shown that the elastic postbuckling response of cylindrical shells can be modified by providing large and strategically designed imperfections, namely, a seeded geometric imperfection (SGI). Specifically, the first paper [10] only presented the SGI concept as one of three approaches to modify the postbuckling behavior.…”

“…Experimental results on three SGI designs showed that the type of postbuckling response could be modified. In the next paper [11], the main focus was to further address some key design issues including the reliability of the test protocol, the sensitivity to initial imperfections, the efficiency of an optimization framework, and the dynamic features in the postbuckling response. Only three SGI designs were evaluated.…”