期刊
COMPOSITE STRUCTURES
卷 189, 期 -, 页码 586-597出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2018.01.108
关键词
Metamaterials; Lattice; Negative thermal expansion
资金
- National Science Foundation [CMMI-1462270]
- Region 2 University Transportation Research Center (UTRC)
- Office of Naval Research
- China Scholarship Council [201508420188]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1462270] Funding Source: National Science Foundation
Materials with engineered thermal expansion coefficients, capable of avoiding failure or irreversible destruction of structures and devices, are important for aerospace, civil, biomedical, optics, and semiconductor applications. In natural materials, thermal expansion usually cannot be adjusted easily and a negative thermal expansion coefficient is still uncommon. Here we propose a novel architected lattice bi-material system, inspired by the Hoberman sphere, showing a wide range of tunable thermal expansion coefficient from negative to positive, -1.04 x 10(-3) degrees C-1 to 1.0 x 10(-5) degrees C-1. Numerical simulations and analytical formulations are implemented to quantify the evolution of the thermal expansion coefficients and reveal the underlying mechanisms responsible for this unusual behavior. We show that the thermal expansion coefficient of the proposed metamaterials depends on the thermal expansion coefficient ratio and the axial stiffness ratio of the constituent materials, as well as the bending stiffness and the topological arrangement of the constitutive elements. The finding reported here provides a new routine to design architected metamaterial systems with tunable negative thermal expansion for a wide range of potential applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据