论文标题
最佳各向同性，可重复使用的桁架晶格材料，泊松比接近零
Optimal isotropic, reusable truss lattice material with near-zero Poisson's ratio
论文作者
论文摘要
软木是一种天然的无定形材料，其比例接近零泊松的比例是密封玻璃瓶的无处不在。它是各向异性，横向各向同性，复合材料，几乎无法缩放。在这里，我们提出了一类新的各向同性和可重复使用的软木状的超材料，该类似于混合桁架式材料，以显示各向同性泊松的比率接近零。使用多目标遗传算法进行优化，该算法在椭圆基函数神经网络的辅助下进行优化，并与有限元模拟进行优化。最佳微型结构的超材料由晶格常数为300 \ micro \ meter制造，其在所有方向上几乎小于0.08。在压缩测试超过$ 20 \％$菌株之后，它可以收回其原始形状的$ 96.6 \％$。
Cork is a natural amorphous material with near-zero Poisson's ratio that is ubiquitously used for sealing glass bottles. It is an anisotropic, transversally isotropic, composite that can hardly be scaled down. Here, we propose a new class of isotropic and reusable cork-like metamaterial that is designed from an hybrid truss-lattice material to show an isotropic Poisson's ratio close to zero. Optimization is conducted using a multi-objective genetic algorithm, assisted by an elliptical basis function neural network, and coupled with finite element simulations. The optimal micro-structured metamaterial, fabricated by two-photon lithography with a lattice constant of 300 \micro\meter, has an almost isotropic Poisson's ratio smaller than 0.08 in all directions. It can recover $96.6\%$ of its original shape after a compressional test exceeding $20\%$ strain.
