Numerical and Experimental Study on Buckling of Longitudinal Corrugated Cylindrical Pressure Shell

Strengthening the carrying capacity of cylindrical pressure-resistant shells by adding circumferential or axial corrugations has received considerable research attention. The buckling behaviors of cylindrical shell and longitudinal corrugated cylindrical shell with equal volume are studied using numerical and experimental methods. Firstly, the geometric and numerical models of the corrugated cylinder shell are established, and the influence of the corrugation parameters on the buckling of the corrugated cylinder shell under uniform external pressure is analyzed. Secondly, two sets of cylindrical and corrugated cylindrical shells with equal wall thickness and volume are designed and manufactured after the parameter optimization of corrugation. Then, the outer surfaces of these fabricated shells are scanned and transformed into numerical models to investigate their buckling characteristics. Finally, each model is slowly loaded to collapse under quasistatic pressure in a cylindrical pressure vessel and the relat