Mechanics and design of topologically interlocked irregular quadrilateral tessellations
Mechanics and design of topologically interlocked irregular quadrilateral tessellations
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DOI：
10.1016/j.matdes.2021.110155
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发表时间：
2021-11-30
影响因子：
8.4
通讯作者：
Siegmund, Thomas
中科院分区：
文献类型：
--
作者：
Kim, Dong Young;Siegmund, Thomas
拓扑互锁材料（TIM）系统是单个构建块的组件，其形状使得单个元件不能随着整个系统的拆卸而从组件中移除。在这里，TIM系统的基础上不规则的四边形正方形镶嵌被认为是。这样的TIM组件的机械性能进行了研究，并与周期性参考TIM系统的机械性能进行比较。进行有限元计算以获得力-挠度曲线并提取刚度、强度和韧性。我们发现，一个显着的分数（约30%）的所有随机生成的架构拥有的属性超过了TIM与一个潜在的定期镶嵌。我们通过3D打印物理实现的实验验证了这一发现。设计参数，以代表机械性能进行了研究，通过使用皮尔逊相关系数。在此过程中，确定主导变量，并根据基础设计变量定义属性的回归模型。通过考虑主导变量，网络模式的组件中发现，这是强烈相关的每一个机械性能。这项研究的结果，使建筑材料系统的设计具有特殊的刚度-强度-韧性组合。2021作者由Elsevier Ltd.发布。这是CC BY许可下的开放获取文章（http：//creativecommons.org/licenses/by/4.0/）。
Topologically Interlocked Material (TIM) systems are assemblies of individual building blocks shaped such that individual elements cannot be removed from the assembly with disassembly of the entire system. Here, TIM systems based on irregular quadrilateral square tessellations are considered. The mechanical properties of such TIM assemblies are investigated and compared to those of the periodic reference TIM system. Finite element computations are performed to obtain force - deflection curves and to extract stiffness, strength, and toughness. We discover that a significant fraction (about 30%) of all randomly generated architectures possess properties exceeding those of the TIM with an underlying regular tessellation. We validate this finding by experiments on 3D printed physical realizations. Design parameters to represent the mechanical properties are studied by the use of Pearson correlation coefficients. In this process, dominant variables are determined and regression models for the properties are defined from the underlying design variables. By considering the dominant variables, network patterns in the assembly are discovered, which are strongly associated with each of the mechanical properties. The findings of this study enable the design of architectured material systems with exceptional stiffness-strength-toughness combinations. CO 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).