Abstract

Thin-walled and large-deformation composite components that need to be stowed and deployed as space deployable structures require a high bonding property. The purpose of this work is to study the failure mode and influence of scroll radius, adhesive elastic modulus, adhesive thickness, and layup angle on the stress of the adhesive layer and strain energy through a numerical method. A good agreement between experimental and numerical results was obtained verifying the numerical method. Firstly, results show that as the scroll radius increases, the shear and peel stress of the adhesive layer, as well as the strain energy, decrease and the failure of the adhesive layer is mainly peel failure. Furthermore, in addition to the shear and peel stress, the strain energy is also substantially affected by the ply angle. Considering the shear stress, peel stress, and strain energy, the [90/0]s ply becomes the best choice. The shear and peel stress increase with increasing adhesive elastic modulus. Lastly, an increase in adhesive thickness is found to decrease the shear and peel stress of the adhesive layer. However, the change in strain energy corresponding to the change in adhesive thickness is small. This study paves the way for the selection of bonding parameters of thin-walled and large-deformation composite components.

摘要

需要作为空间可展开结构收起和展开的薄壁和大变形复合材料部件需要高粘合性能。本工作的目的是通过数值方法研究涡旋半径、胶粘剂弹性模量、胶粘剂厚度和铺设角度对胶粘剂层应力和应变能的破坏模式和影响。实验结果与数值结果吻合良好，验证了数值方法。首先，结果表明，随着滚动半径的增加，胶层的剪切和剥离应力以及应变能减小，胶层的破坏主要是剥离破坏。此外，除了剪切应力和剥离应力外，应变能也受到层板角度的显着影响。考虑剪应力，剥离应力和应变能，[90/0]s 层成为最佳选择。剪切应力和剥离应力随着粘合剂弹性模量的增加而增加。最后，发现粘合剂厚度的增加会降低粘合剂层的剪切和剥离应力。然而，对应于粘合剂厚度变化的应变能变化很小。该研究为薄壁大变形复合材料构件的结合参数选择铺平了道路。