Experiments on the postbuckling behavior of circular cylindrical shells under compression

Buckling Modes and Developable Postbuckling Modes of Axially Compressed Short Circular Cylindrical Shells

“…For the prescribed nondimensional buckling load q 2 ¼ 0:001469, the minimum cylinder length L ¼ 71:9 mm is determined here for a symmetric mode and n ¼ 16. The value of q 2 was found by trial and error to bring the calculated length close to the 4,5) are considered by the present author to be composed of several types of triangles or trapezoids on the cylindrical shells as discussed previously, 1) if the ratio of the thickness to the radius is very small. Because the patterns of the symmetric modes for this cylindrical shell look like the well-known buckling modes under lateral pressure, only the patterns for the asymmetric modes are shown in Fig.…”

“…While this phenomenon has been well reported, buckling modes have never been calculated for circular cylindrical shells of finite length whose corresponding postbuckling modes are known. 2) The postbuckling modes calculated and measured by Yamaki et al 4,5) for a cylinder of finite length are shown to be deployable on flat surfaces due to the developability of cylindrical shells. Key references related to the present problem are found in the text by Singer et al 6) …”

“…5) Yamaki and Kodama 4) analytically examined postbuckling behavior of cylinders with the same geometrical and material properties used in previous experiments.…”

“…The axial buckling mode is calculated for a cylindrical shell that has been fully examined experimentally 5) and analytically 4) in the postbuckling region. The buckling mode calculated in the following changes into a postbuckling mode calculated by Yamaki and Kodama by snap-through.…”

“…5) Note, however, that they did not calculate the buckling mode of the cylinder, whereas this calculation clarifies the entire process of mode changes during buckling and postbuckling. This enables us to visualize the axial buckling mode for a cylindrical shell of finite length whose postbuckling characteristics have been previously investigated both experimentally and analytically.…”