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Buckle Propagation in Steel pipes of Ultra-high Strength:Experiments,Theories and Numerical Simulations

Acta Mechanica Solida Sinica 2020年第4期33卷 546-563页

作者： Haofeng Liang Jiahui Zhou Jixin Lin Fusong Jin Fei Xia Jianghong Xue Jiachu Xu School of Civil and Construction Engineering Jinan University/Key Lab of Disaster Forecast and Control in EngineeringMinistry of EducationGuangzhou 510632China

In this paper,experimental,theoretical and numerical approaches were employed to scrutinize the buckle propagation events occurring in pipes subjected to external *** groups of samples with different radius-to-thickness ratios were fabricated using steel pipes of ultra-high strength and were subjected to compression of external pressure in a sealed pressure vessel specially designed and customized for the *** results were recorded through a data acquisition *** facilitating the theoretical calculations,uniaxial tensile tests were performed on tensile pieces cut from the same pipes to obtain the material *** was found from the experimental results that once a buckle is initiated in a pipe,the external pressure dropped to a specific value called buckle propagation pressure and kept at this level until the whole pipe is flattened into a dog-bone *** on the measured material properties and geometric parameters,theoretical solutions were computed using established ring models and shell model,and finite element predictions were also obtained from ABAQUS *** efficiency and accuracy of the shell model and finite element model were expounded by comparing various theoretical solutions and numerical predictions with the experimental *** the authenticated shell model and finite element model,a deep insight into the phenomenon of buckle propagation of pressurized long pipes was provided by performing a series of parametric study.

关键词： Steady-state buckle propagation.Ring model Shell model subsea pipes External pressure

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