| Multimaterial Lattice Structures With Thermally Programmable Mechanical Behaviors北大核心CSCD |
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| 引用本文： | 杨航,马力.Multimaterial Lattice Structures With Thermally Programmable Mechanical Behaviors北大核心CSCD[J].应用数学和力学,2022,43(5):534-552. |
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| 作者姓名： | 杨航 马力 |
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| 作者单位： | 哈尔滨工业大学 复合材料与结构研究所，哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金(12072092)； |
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| 摘 要： | 传统的点阵结构一旦制备完成，其力学性能通常在使用寿命内保持不变。设计和制造具有环境适应特性的智能点阵结构，可编程地感知和响应外界变化(例如光强、压强、溶液、温度、电磁场、电化学激励)，并在时间和空间上进行形状重构、模式转换和性能调控，仍然是人造材料研究领域重要的科学挑战。该文采用具有不同玻璃化转变温度和温度依赖性的多种聚合物材料，通过合理设计材料空间分布，提出了一类具有热可编程力学响应能力的多材料点阵结构。结合理论分析和有限元模拟，研究了组分材料相对刚度对多材料点阵结构的Poisson比、变形模式以及结构稳定性的影响。通过温度变化实现了对多材料点阵结构弹性常数、压溃响应和结构稳定性的调控，使多材料点阵结构表现出极大的热变形、超弹性和形状记忆效应。为设计和制造自适应保护装备、生物医学设备、航空航天领域的变形结构、柔性电子设备、自组装结构和可变形软体机器人等开辟了新途径。
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| 关 键 词： | 点阵结构 温度控制 可调Poisson比 结构稳定性 热变形 形状记忆效应 |
| 收稿时间： | 2022-03-28 |
Multimaterial Lattice Structures With Thermally Programmable Mechanical Behaviors |
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| Yang H.Ma L..Multimaterial Lattice Structures With Thermally Programmable Mechanical Behaviors[J].Applied Mathematics and Mechanics,2022,43(5):534-552. |
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| Authors: | Yang HMa L |
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| Affiliation: | Center for Composite Materials and Structure, Harbin Institute of Technology, Harbin 150001, P.R.China |
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| Abstract: | Traditional lattice structures usually maintain their mechanical properties throughout their lifetime. Designing and manufacturing intelligent materials with environmental adaptability, programmable sense and responses to external changes (such as light, pressure, solution, temperature, electromagnetic field and electrochemical reaction), shape transformation, mode conversion and performance regulation in space and time, are still important scientific challenges in the field of artificial materials. In this paper, multimaterial lattice structures with thermally programmable mechanical responses were proposed by means of polymer materials with disparate glass transition temperatures and temperature dependencies, and through reasonable design of the spatial distribution of the materials. By theoretical analysis combined with finite element simulation, the effects of the relative stiffnesses of constitute materials on Poisson’s ratios, deformation modes and structural stability of the multimaterial lattice structures, were studied. The elastic constants, crushing responses and structural stability of multimaterial lattice structures were regulated by temperature control, consequently the multimaterial lattice structures were endowed with giant thermal deformation, hyperelasticity and shape memory effects. This paper opens up new avenues for the design and manufacture of adaptive protection equipment, biomedical devices, aerospace morphing structures, flexible electronic devices, self-assembly structures and reconfigurable soft robots. |
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| Keywords: | Lattice structure Shape memory effect Structural stability Temperature control Thermal deformation Tunable Poisson's ratio |
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