Wang Li-Wu, Bai Jiang-Bo, Shi Yan
School of Civil Engineering, Southeast University, Nanjing 210096, China.
Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China.
Materials (Basel). 2021 Dec 16;14(24):7809. doi: 10.3390/ma14247809.
Foldable and deployable flexible composite thin-walled structures have the characteristics of light weight, excellent mechanical properties and large deformation ability, which means they have good application prospects in the aerospace field. In this paper, a simplified theoretical model for predicting the position of the neutral section of a lenticular deployable composite boom (DCB) in tensile deformation is proposed. The three-dimensional lenticular DCB is simplified as a two-dimensional spring system and a rigid rod, distributed in parallel along the length direction. The position of the neutral cross-section can be determined by solving the balance equations and geometric relations. In order to verify the validity of the theoretical model, a finite element model of the tensile deformation of a lenticular DCB was established. The theoretical prediction results were compared with the finite element calculation results, and the two results were in good agreement.
可折叠展开的柔性复合薄壁结构具有重量轻、力学性能优异和变形能力大的特点，这意味着它们在航空航天领域具有良好的应用前景。本文提出了一种用于预测双凸透镜形可展开复合材料梁（DCB）在拉伸变形时中性截面位置的简化理论模型。将三维双凸透镜形DCB简化为沿长度方向平行分布的二维弹簧系统和刚性杆。中性截面的位置可通过求解平衡方程和几何关系来确定。为了验证理论模型的有效性，建立了双凸透镜形DCB拉伸变形的有限元模型。将理论预测结果与有限元计算结果进行了比较，两者结果吻合良好。
