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Composite Tube Hinges

机译：复合管铰链

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This paper is concerned with self-powered, self-latching tube hinges, made by cutting three parallel slots in a thin-walled carbon fiber reinforced plastic tube with a circular cross section. Thus, a hinge consists of two short tubes connected by three transversally curved strips of material (known as tape springs). A particular tube hinge design is considered, with a diameter of about one-third that of the hinges used previously; this requires the tape springs to reach strains close to failure when the hinge is folded. Three analyses of the peak strains in a tube hinge are presented. The first analysis obtains general analytical expressions for the longitudinal fold radius of a tape spring and the associated peak fiber strains. The second analysis is a finite-element simulation of the folding of a single tape spring and the third analysis is a simulation of a complete tube hinge. It is found that the largest fiber strains in one- and two-ply hinges can be predicted analytically with very good accuracy. It is also found that the contact and interaction between the three tape springs that form a tube hinge, modeled in the third analysis, do not affect the peak strains significantly.
机译：本文涉及自供电，自锁式管铰链，它是通过在具有圆形横截面的薄壁碳纤维增强塑料管中切割三个平行槽而制成的。因此，铰链由两个短管组成，两个短管通过三个横向弯曲的材料条（称为带弹簧）相连。考虑一种特殊的管铰链设计，其直径约为先前使用的铰链直径的三分之一。这就要求当折叠铰链时带状弹簧达到接近失效的应变。对管铰链的峰值应变进行了三种分析。第一分析获得了带状弹簧的纵向折叠半径和相关的峰值纤维应变的一般解析表达式。第二种分析是单个带状弹簧折叠的有限元模拟，而第三种分析是完整的管铰链的模拟。发现可以通过分析非常准确地预测出一层和两层铰链中最大的纤维应变。还发现，在第三次分析中建模的，形成管铰链的三个带状弹簧之间的接触和相互作用不会显着影响峰值应变。

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