When an architected material with snap-through instabilities is loaded, the unit cells of the architected material snap sequentially to a series of deformed configurations. In this paper, we propose the novel concept of multimaterial viscoelastic architected materials whose snapping sequence can be tuned using temperature as a control parameter. Because different polymers have different temperature-dependent properties, it is possible that one polymer that is stiffer than another polymer at one temperature becomes softer at a higher temperature. A 3D printing inverse molding process is used to fabricate soft multimaterial architected materials that consist of two different polymers. Using finite element simulations and experiments, we demonstrate that the snapping sequence of these multimaterial architected materials depends on temperature. The influence of the geometrical parameters of the design on the critical temperature at which the snapping sequence switches from one sequence to another sequence is systematically analyzed using simulations and experiments. Being able to tune the snapping sequence using temperature makes it possible to obtain a large number of distinct stable configurations in response to compressive loads. To illustrate a potential application, we demonstrate that these materials can be used as soft reconfigurable metamaterials with tunable stiffness.

中文翻译：

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粘弹性多稳态建筑材料，具有取决于温度的捕捉顺序†

当加载具有快速不稳定性的结构化材料时，该结构化材料的单位晶格会依次咬合到一系列变形配置中。在本文中，我们提出了一种多材料粘弹性建筑材料的新概念，该材料可以使用温度作为控制参数来调整其贴合顺序。因为不同的聚合物具有不同的温度相关特性，所以一种聚合物在一个温度下比另一种聚合物硬的可能在更高的温度下变得更软。3D打印逆模塑工艺用于制造由两种不同聚合物组成的柔软的多材料架构材料。使用有限元模拟和实验，我们证明了这些多材料结构材料的捕捉顺序取决于温度。使用模拟和实验系统地分析了设计的几何参数对临界温度的影响，在临界温度下，捕捉序列从一个序列转换为另一序列。能够使用温度调节捕捉序列，使得有可能响应于压缩载荷而获得大量不同的稳定配置。为了说明潜在的应用，我们证明了这些材料可以用作具有可调刚度的软可重构超材料。能够使用温度调节捕捉序列，使得有可能响应于压缩载荷而获得大量不同的稳定配置。为了说明潜在的应用，我们证明了这些材料可以用作具有可调刚度的软可重构超材料。能够使用温度调节捕捉序列，使得有可能响应于压缩载荷而获得大量不同的稳定配置。为了说明潜在的应用，我们证明了这些材料可以用作具有可调刚度的软可重构超材料。