構造要素の衝突圧壊強度に関する基礎的研究 : その2 : 円筒殻の非軸対称圧壊実験と有限要素解析

概要

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The non-axisymmetric crush tests were conducted for 11 mild steel cylinders with different R/t ratios, and the obtained results were compared with the theoretical, numerical and other experimental results from various points of view. The conclusions can be summarized as follows : (1) The plastic buckling loads due to Gerard's theory agree well with the maximum loads obtained in the present experiments. (2) As for the relation between the radius-to-thickness ratio and the circumferential wavenumber in the non-axisymmetric crushing mode, the validity of the existing solutions given by one of authors was confirmed. (3) Magee's empirical formula for the mean crushing strength is in good agreement with the present expermental results. (4) The nonlinear finite element code developed in the previous report gave improved solutions for the mean crushing stresses in comparison with the existing rigid-plastic solutions, which are in good agreement with the experimental results except for the case of relatively thick-walled cylinders. (5) The actual complicated crushing processes accompanied with traveling hinge lines were successfully simulated by the present finite element code.
社団法人日本船舶海洋工学会の論文