Abstract This paper studies the unfolding mechanical behavior of a creased membrane with different crease characteristics under tensile load. The three-dimensional unfolding shape measured by a noncontact test system reflects both panel bending and crease opening. The rotational stiffness of the crease can be characterized based on the test shape. A finite deformation crease–beam model is developed to describe this unfolding mechanism. The predicted results show that the unfolding behavior of the creased membrane is affected by the ratio of the rotational stiffness of the crease to the bending stiffness of the panel. Analysis of the unfolding mechanism for the creased membrane reveals the contributions of three deformation styles—namely panel bending, panel tension, and crease opening—during different unfolding stages. The present results can be used to guide the controllable unfolding of crease-based deployable structures by adjusting the crease characteristics.

中文翻译：

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基于有限变形折痕梁模型的折痕膜准静态展开力学

摘要 本文研究了具有不同折痕特性的折痕膜在拉伸载荷下的展开力学行为。由非接触式测试系统测量的三维展开形状反映了面板弯曲和折痕开口。折痕的旋转刚度可以基于测试形状来表征。开发了一个有限变形折痕梁模型来描述这种展开机制。预测结果表明，折痕膜的展开行为受折痕旋转刚度与面板弯曲刚度之比的影响。对折痕膜展开机制的分析揭示了三种变形方式——即面板弯曲、面板张力和折痕打开——在不同展开阶段的贡献。