所属单位：土木工程学院

发表刊物：应用力学学报

关键字：中文关键字：双稳态；柱壳；理想塑性；应变能；数值模拟，英文关键字：bi-stable; cylindrical shell; perfectly plastic; s

摘要：For the isotropic shell, a mechanical model in terms of only two parameters is proposed. Based on the principle of minimum potential energy, the conditions for bi-stability of isotropic shell are derived. The results indicate that, an isotropic shell will have its two stable states if the acting initial stress satisfies some confined conditions, and it has two opposite curvatures corresponding to the two stable states, which is different from the behavior of bi-stable composite laminate shell with anti-symmetrical lay-up. Further, the bi-stable model is improved taking into account boundary effect of the shell. The computation shows the rolled-up radius for the second stable state of the shell becomes larger. And the smaller the initial central angle for cross-section of the shell, the larger influence of the boundary effect on the rolled-up radius will be. Meanwhile, using shell element in ABAQUS code, numerical simulation on bi-stable process is carried out by imposing edge bending moment on the shell. The results show that numerical results of rolled-up radius characterizing the bi-stability agree well with the predicted results, which proves the validity of the models including boundary effect.

第一作者：吴耀鹏

论文类型：期刊论文

卷号：卷：28

期号：期：3

页面范围：页：243-248

是否译文：否

发表时间：2011-06-01