A class of diatomic 2-D soft granular crystals undergoing pattern transformations,Soft Matter

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A class of diatomic 2-D soft granular crystals undergoing pattern transformations
Soft Matter ( IF 2.9 ) Pub Date : 2017-08-17 00:00:00 , DOI: 10.1039/c7sm01430a
Bodhi Rudra _{1,

2,

3,

4,

5} , Yunyao Jiang _{5,

6,

7,

8} , Yaning Li _{5,

6,

7,

8} , Jongmin Shim _{1,

2,

3,

4,

5}

Affiliation

We propose a class of diatomic 2-D soft granular crystals, which features pattern transformation under compression with lateral confinement. The proposed granular crystals are composed of two different types of cylinders: large soft cylinders and small hard cylinders. The pattern-transformable granular crystals are obtained by exploring perturbed packing patterns as potential configurations, and compression with lateral confinement as the driving force of the transition. As a demonstration of the proof-of-concept, we first show the results of desktop-scaled experiments and finite element simulations for a representative case. Then, we present the procedure to obtain these new pattern transformations in soft granular crystals based on the compact packing theory of diatomic circles. The scale-independent compact packing theory serves as an important part of the veiled underlying mechanism of the observed pattern transformations, so the proposed granular crystals can open new avenues in the microstructural design of functional materials towards practical applications.

中文翻译：

一类经历模式转换的双原子二维软质颗粒晶体

我们提出了一类双原子的二维软粒状晶体，其特征是在侧向约束下受压时会发生模式转变。提出的粒状晶体由两种不同类型的圆柱体组成：大的软圆柱体和小的硬圆柱体。图案可转换的粒状晶体是通过将扰动的堆积图案作为潜在的构型进行探索，并以横向约束作为过渡的驱动力来进行压缩而获得的。作为概念验证的演示，我们首先显示一个代表性案例的桌面规模实验和有限元模拟的结果。然后，我们提出了基于双原子圆的紧密堆积理论在软粒状晶体中获得这些新的模式转变的过程。

更新日期：2017-09-13

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