Modular shape-switching architected materials toward programmable acoustic properties

作者：Liu, Tianchang; Gan, Zhantu; Yin, Yiwei; Zhao, Dongdong; Hu, Nan^*

来源：Extreme Mechanics Letters, 2023, 61: 102029.

DOI：10.1016/j.eml.2023.102029

• Snap-through buckling
• Origami
• Multi-stable materials
• Acoustic waves
• Modular design

Next-generation acoustic devices and systems have utilized the recent advances in shape-switching and reconfigurable origami-inspired architected materials. Motivated by those efforts, we herein develop a hybrid material design strategy by combining two types of architected materials for their potential applications in tunable acoustic diffusion. The bilayered modular material consists of bistable/multistable blocks as the actuation layer and the origami sheet as the function layer. Guided by numerical simulations and physical prototyping, we proved the feasibility of controllable acoustic properties induced by programmable shape-switching sequences and customized corrugations in prototypes of linear units and planar units. Such programmability could offer the on-demand modification of scattering field directivity and variation of diffusion coefficients at various states compared to their traditional fixed counterparts. Overall, the proposed strategy opens the route to developing acoustic devices and systems with tailorable properties at different length scales.& COPY; 2023 Elsevier Ltd.