Mechanics of tubes composed of interlocking building blocks
Mechanics of tubes composed of interlocking building blocks
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由互锁构件组成的管的力学
DOI：
10.1016/j.ijengsci.2022.103654
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发表时间：
2022
影响因子：
6.6
通讯作者：
Siegmund, Thomas
中科院分区：
文献类型：
--
作者：
Mahoney, Kyle;Siegmund, Thomas
拓扑联锁材料(TIM)系统是由凸多面体单元组成的，这些单元放置在积木上，以限制彼此的运动。这里，TIM管被认为是这种组件的轧制单分子层。考虑了这些组合管子在径向载荷作用下的变形响应。这项研究采用了附加制造的物理实现和接触相互作用的有限元分析的实验。通过检查最小主应力的分布，使拓扑联锁管内的载荷传递合理化。建立了拓扑联锁管束变形的推力线模型。该模型将组合管道的变形行为近似为一组与系统中最大荷载传递路径对齐的米塞斯桁架的响应。TL模型的预测结果与有限元模型的预测结果吻合较好。考虑到TL模型中积木之间的滑动，得到的预测响应与添加制造的管子的实验结果更相似。
Topologically interlocking material (TIM) systems are composed of convex polyhedral units placed such that building blocks restrict each other’s movement. Here, TIM tubes are considered as rolled monolayers of such assemblies. The deformation response of these assembled tubes under diametrical loading is considered. This investigation employs experiments on additively manufactured physical realizations and finite element analysis with contact interactions. The internal load transfer in topologically interlocking tubes is rationalized through inspection of the distribution of minimum principal stress. A thrust-line (TL) model for the deformation of topologically interlocking tubes is established. The model approximates the deformation behavior of the assembled tubes as the response of a collection of Mises trusses aligned with paths of maximum load transfer in the system. The predictions obtained with the TL-model are in good agreement with results of finite element models. Accounting for sliding between building blocks in the TL-model yields a predicted response more similar to experimental results with additively manufactured tubes.