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本文介绍了以全量理论为基础的折板结构弹塑性有限元分析过程。为简化计算,假定材料为弹性—理想塑性的和不可压缩的,并采用了独立作用屈服面,从而使其得计算量和所需的存储量比增量法大大减少。为了说明精度和效能,将本文方法应用于计算简支梁、方板和槽形截面悬臂梁,并把结果同其它解法和实验进行比较。此外还对影响精度的诸因素进行了讨论。
In this paper, the elasto-plastic finite element analysis process of the folded plate structure based on the full quantity theory is introduced. In order to simplify the calculation, it is assumed that the material is elastic-ideal plastic and incompressible, and an independent acting yield surface is used, so that the amount of calculation and the required storage capacity are greatly reduced compared to the incremental method. In order to illustrate the accuracy and efficiency, this method was applied to the calculation of simply supported beams, square plates and slot-section cantilever beams, and the results were compared with other solutions and experiments. In addition, factors affecting accuracy are discussed.