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• W3204036713 startingPage "108471" @default.
• W3204036713 abstract "The sequential limit analysis (SLA) approach can trace load–deflection response and the corresponding plastic limit load of the structures accurately and efficiently. However, this method is limited to the structures without large shape changes in the plane stress directions. In this study, an extended SLA established on moving coordinates is proposed to investigate its further extension for strain-hardening circular membranes with large deflections and shape change behaviors. This new method features dividing entire analysis into sequential optimization problems based on moving coordinate systems to deal with the shape change in plane stress direction for the strain-hardening circular membranes subjected to large deflections. The corresponding adaptive geometry update strategy is also presented. Moreover, the elastic–plastic incremental simulations are conducted for the purpose to validate the correctness and feasibility of the simplifications during model construction and the analysis accuracy of this newly proposed method. From the contrastive results between the extended SLA and ABAQUS simulation, the accuracy of this new approach is confirmed. Furthermore, from the parametric analysis results, the fact can be concluded that the accuracy of SLA for load estimation will be improved with the increase of material Young’s modulus, and reduces with the increase of the initial yield strength and the hardening exponent and hardening coefficient. The accuracy of this method is more sensitive towards hardening exponent and initial yield strength while it is less sensitive towards hardening coefficient. In addition, this extended SLA method with the assumptions of zero bending moment can tolerate a high range variation of thickness–radius ratio, particularly in materials with higher Young’s modulus. These characteristics enables this method be adopted in wild practical application fields as a feasible tool to design the membrane structures initially and determine the structure safety factors preliminarily. • An extended sequential limit analysis based on the moving coordinates is proposed. • Large shape change and plane stress direction of strain-hardening circular membrane is focused. • Moving coordinate systems are adopted to deal with plane stress direction change. • Collapse mechanism and shape-geometry update strategy affect parameter sensitivity. • Yield level and bending moment are main influencing factor of limit load estimation." @default.
• W3204036713 created "2021-10-11" @default.
• W3204036713 creator A5074348423 @default.
• W3204036713 date "2021-12-01" @default.
• W3204036713 modified "2023-10-03" @default.
• W3204036713 title "Extended sequential limit analysis: Addressing large deflections and shape changes in strain hardening circular membranes with a moving coordinate system" @default.
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• W3204036713 doi "https://doi.org/10.1016/j.tws.2021.108471" @default.
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