Numerical model for prediction of wrinkling behavior on a thin-membrane structure
Numerical model for prediction of wrinkling behavior on a thin-membrane structure
复制标题
预测薄膜结构起皱行为的数值模型
DOI：
10.1299/mej.2014se0041
复制
发表时间：
2014
影响因子：
4.4
通讯作者：
Yasuyuki Miyazaki
中科院分区：
文献类型：
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作者：
Shoko Arita;T. Okumiya;Yasuyuki Miyazaki
开发薄纱空间结构的关键方面之一是预测材料中的皱纹和松弛。皱纹，这基本上是指弹性屈曲，已使用有限元法（FEM）与壳单元进行了数值分析，但在一个高的计算成本。因此，膜单元，忽略弯曲刚度，只考虑面内应力，已被用来降低计算成本。然而，在精确预测膜结构中的褶皱区域时，膜的压缩刚度不能被忽略。一些以前的研究采用膜元素考虑小，恒定的非零值的压缩刚度，这些膜元素可以预测的主应力的分布作为皱纹区域。然而，这些传统的方法都不能确定抗压刚度的值，松弛区的主应力分布的某些部分不符合实际的现象。因此，为了合理、唯一地确定压缩刚度，本文提出了一种新的数值计算模型--基于可拉伸弹性理论的修正刚度缩减模型（Mod-SRM）。此外，通过与其他有限元模型的比较，我们确认Mod-SRM代表松弛区比传统的模型更准确。
One of the key aspects of developing gossamer space structures is the prediction of wrinkles and slacks in the material. Wrinkles, which essentially refer to elastic buckling, have been analyzed numerically using finite element methods (FEMs) with shell elements, but at a high computational cost. Therefore, membrane elements, which ignore bending stiffness and consider only in-plane stress, have been employed to reduce the computational cost. However, the compressive stiffness of the membrane cannot be ignored when predicting wrinkle regions precisely in membrane structures. Some previous studies have employed membrane elements considering small, constant non-zero values of compressive stiffness; these membrane elements can predict the distribution of principal stress as the wrinkle regions. However, none of these traditional methods can determine the value of compressive stiffness, and some parts of the principal stress distribution in slack areas do not correspond to the actual phenomenon. Therefore, in order to determine compressive stiffness logically and uniquely, we propose a new numerical calculation model, the modified-stiffness reduction model (Mod-SRM), which is based on the stretchable elastic theory. Moreover, by comparison with the other FEM models, we confirm that Mod-SRM represents the slack region more accurately than the traditional models.
DOI：
--
发表时间：
2008
期刊：
AIAA Paper(Proceeding of 49th AIAA/ASME/ASCE/AHS/ASC) 2008-2134(CD-ROM)
影响因子：
--
作者：
Yasuyuki Miyazaki;Kosuke Arita
通讯作者：
Kosuke Arita