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Topology optimization and FDM prototyping of bionic inspired strengthening-ribs in membranes

机译：仿生启发膜中加强筋的拓扑优化和FDM原型设计

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Deployable membrane structure widely used in large spacecraft such as solar cell array, solar sail, which has the advantages of large area, light weight, small folded size, and can effectively reduce the cost of research and launch of the spacecraft. Getting inspiration by the ultralight structure ribs of leaves and wings in nature with excellent structural rigidity and strength, gradient structure strengthening-ribs has been added on membranes to enhance their ability of resist tearing. The problem that spacecraft membranes is easier to be tore open has been mainly focused in this paper, and biomimetic strengthening ribs structure has been proposed for a space membrane structure which used interdisciplinary strengths, such as bionic technology, topological optimization technology, composite materials technology, and rapid prototyping. The optimization method and process method of biomimetic strengthening ribs has been studied. Through topology optimization, biomimetic ribs with good tensile and tear capacity has been obtained via ABAQUS. The topology optimization structure has been remodeled via three-dimensional model. Carbon fiber reinforced PEEK composites which having priority of thermal stability and good processing properties in strengthening ribs of membranes structure has been selected. FDM technology has been utilized to print the strengthening ribs of membranes. Deformation and tearing of two kinds of membranes with and without strengthening ribs has been compared by tear-resistance tests. Experimental results showed that membrane with biomimetic strengthening ribs structure has better mechanical properties, and has important significance to avoid membrane tear and ensure the spacecraft orbital lifetime.
机译：可展开的膜结构广泛用于大型航天器，例如太阳能电池阵列，太阳帆，具有面积大，重量轻，折叠尺寸小等优点，可以有效降低航天器的研究和发射成本。从自然界中具有超强结构刚度和强度的叶片和翅膀的超轻结构肋获得灵感，在膜上添加了梯度结构加强筋，以增强其抗撕裂能力。本文主要针对航天器膜易于撕开的问题，针对仿生技术，拓扑优化技术，复合材料技术等跨学科优势，提出了一种仿生强化肋结构的跨膜结构。和快速的原型制作。研究了仿生加强筋的优化方法和工艺方法。通过拓扑优化，通过ABAQUS获得了具有良好拉伸和撕裂能力的仿生肋骨。拓扑优化结构已通过三维模型进行了重构。选择了碳纤维增强的PEEK复合材料，该复合材料在增强膜结构的肋条方面具有热稳定性和良好的加工性能。 FDM技术已用于印刷膜的加强筋。通过抗撕裂测试比较了具有和不具有加强肋的两种膜的变形和撕裂。实验结果表明，具有仿生强化肋结构的膜具有较好的力学性能，对于避免膜撕裂和确保航天器的轨道寿命具有重要意义。

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