Mechanical Properties of Highly Deformable Elastomeric Gyroids for Multifunctional Capacitors
Mechanical Properties of Highly Deformable Elastomeric Gyroids for Multifunctional Capacitors
复制标题
多功能电容器用高变形弹性体陀螺仪的机械性能
DOI：
10.1002/adem.202300629
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发表时间：
2023
影响因子：
3.6
通讯作者：
Silberstein, Meredith N.
中科院分区：
文献类型：
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作者：
Baker, Emilie R.;Ly, Khoi;Bosnjak, Nikola;O’Neill, Maura R.;Miller, Rachel;Li, Sandra;Shepherd, Robert F.;Silberstein, Meredith N.
三重周期极小表面晶格具有源自晶胞几何形状和基底材料的机械性质。通过nTopology和Abaqus等计算软件，这些几何形状用于调整非线性应力-应变曲线，这是单独使用固体材料无法实现的，并且与组成材料相比，将柔度改变了两个数量级。在这项研究中，四个弹性TPMS陀螺进行大变形压缩和拉伸测试，以调查结构的几何形状对机械性能的影响。在所有样品中，应变ε= 0.05 $/ε = 0.05$下的模量变化超过一个数量级（来自压缩下的FEA的7.7- 293.4kPa）。这些晶格是设计多功能系统的有前途的候选者，这些系统可以通过利用几何形状的大表面积与体积比同时执行多项任务。例如，将格架的承载载荷和沿着存储机械能的建筑功能与用于能量存储的较大表面积相结合。展示了一种可同时实现三种功能的柔性双螺旋电容器：承载、储能和传感。
Triply periodic minimal surface lattices have mechanical properties that derive from the unit cell geometry and the base material. Through computation software like nTopology and Abaqus, these geometries are used to tune nonlinear stress–strain curves not readily achievable with solid materials alone and to change the compliance by two orders of magnitude compared to the constituent material. In this study, four elastomeric TPMS gyroids undergo large deformation compression and tension testing to investigate the impact of the structure's geometry on the mechanical properties. Among all the samples, the modulus at strainε=0.05$\epsilon = 0.05$ varies by over one order of magnitude (7.7–293.4 kPa from FEA under compression). These lattices are promising candidates for designing multifunctional systems that can perform multiple tasks simultaneously by leveraging the geometry's large surface area to volume ratio. For example, the architectural functionality of the lattice to bear loads and store mechanical energy along with the larger surface area for energy storage is combined. A compliant double‐gyroid capacitor that can simultaneously achieve three functions is demonstrated: load bearing, energy storage, and sensing.