An Analytical Approach for Deformation Shapes of a Cylindrical Shell with Internal Medium Subjected to Lateral Contact Explosive Loading

Abstract

An experimental investigation on deformation shape of a cylindrical shell with internal medium subjected to lateral contact explosion was carried out briefly. Deformation shapes at different covered width of lateral explosive were recovered experimentally. Based on the experimental results, a corresponding analytical approach has been undertaken with rigid plastic hinge theory. In the analytical model, the cylindrical shell is divided into end-to-end rigid square bars. Deformation process of the cylindrical shell is described by using the translations and rotations of all rigid square bars. Expressions of the spring force, buckling moment, and deflection angle between adjacent rigid square bars are conducted theoretically. Given the structure parameters of the cylinder and the type of the lateral explosive charge, deformation processes and shapes are reported and discussed using the analytical approach. A good agreement has been obtained between calculated and experimental results, and thus the analytical approach can be considered as a valuable tool in understanding the deformation mechanism and predicting the deformation shapes of the cylindrical shell with internal medium subjected to lateral contact explosion. Finally, parametric studies are carried out to analyze the effects of deformation shape, including the covered width of the lateral explosive, explosive charge material, and distribution of initial velocity.

Research into the Energy Output of Asymmetric Cylindrical Structure under Internal Explosion Loading

“…The casing profile plays an important role in the design of a deformable cylindrical structure. Li et al [14] conducted some experiments for the deformation shape of cylindrical casing with an internal medium under lateral explosion loading. Gefken et al [15] studied the damage efficiency of cylindrical casing subjected to partial explosion loading by using an energy analysis method.…”

Rapid Evaluation and Analysis of the Deformation of Filled Cylindrical Casing with Deforming Charge Width Based on Self-Compiled MATLAB Program

“…Li et al [21] investigated two kinds of the cylindrical shell models with the same geometry characteristics: unfilled and filled with sand. Based on the plane strain hypothesis and plastic hinge theory, Ding [22][23][24][25] and Li [26] studied the deformation mechanism of filled cylindrical casings under lateral explosive loading. The dispersion rule of fragments and energy output were also studied.…”