Double-strip metamaterial for vibration isolation and shock attenuation

• Published in: International journal of mechanical sciences 2024-11, Vol.282, p.109686, Article 109686
• Main Authors: Yan, Sen, Wu, Lingling, Meng, Zhiqiang, Tan, Xiaojun, Liu, Wenlong, Wen, Yongzheng, Sun, Jingbo, Tian, Xiaoyong, Zhou, Ji
• Format: Article
• Language: English
• Subjects: Buckling; Energy dissipation; Mechanical metamaterial; Quasi-zero stiffness; Shock attenuation; Structural design; Vibration isolation
• ISSN: 0020-7403
• DOI: 10.1016/j.ijmecsci.2024.109686

•A metamaterial is designed for vibration isolation and shock energy dissipation.•Diverse buckling behaviors enable quasi-zero stiffness and energy dissipation.•A theoretical model for the double-strip metamaterial is established.•Our metamaterial can isolate vibrations above 13 Hz and reduce shocks by 58 %. Mechanical metamaterials have emerged as a promising solution for shielding against environmental vibrations and shocks. However, most existing metamaterials provide a single functionality in mechanical protection, limiting their adaptability to complex working scenarios. To address this limitation, we propose a double-strip metamaterial (DSM) that achieves both vibration isolation and shock attenuation. The DSM employs quasi-zero stiffness for vibration isolation and snap-through buckling for shock energy dissipation. Buckling mode analysis reveals that the dual-functionality of the DSM arises from its diverse buckling behaviors, with theoretical models further quantifying its mechanical response. The DSM can effectively isolate the vibration above 13 Hz and reduce instantaneous shock by up to 58 %, as demonstrated by dynamic tests. This design strategy opens new avenues for comprehensive protection in engineering applications, spanning aerospace, automotive, and logistics. [Display omitted]