相关实验视频
Updated: Aug 7, 2026

11:57
Fabricating Metamaterials Using the Fiber Drawing Method
Published on: October 18, 2012
13.8K
在模块化设计的散装元材料中进行热校正
Hongying He1, Weixiang Peng1, Hortense Le Ferrand1,2
1School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Advanced materials (Deerfield Beach, Fla.)
|November 8, 2023
概括
研究人员开发了用于定向热控制的散装元材料,使得宏观尺度的热校正成为可能. 这一突破为先进的热管理解决方案提供可调节的热性能.
科学领域:
- 材料科学 材料科学 材料科学
- 热力学是一种热力学.
- 纳米技术纳米技术
背景情况:
- 热校正,即单向偏热传输,对于热管理至关重要.
- 当前的热校正设备往往是复杂的,纳米级的,缺乏宏观级的可编程性.
- 在宏观尺度上实现可编程的3D热控制仍然是一个重大挑战.
研究的目的:
- 为了创建能够进行宏观热整形的散装元材料.
- 通过微观结构设计来证明可编程控制传热方向性.
- 探索使用工程化超材料的新型热管理策略.
主要方法:
- 散装元材料的模块化设计,具有可调节的微观结构.
- 从单一材料组成制造微结构复合材料.
- 在收和分离状态下传热特性的表征.
主要成果:
- 成功创建了大量的超材料,这些材料表现出热校正.
- 通过调整元材料设计来展示定向传热控制.
- 为宏观传热效应实现可调节的局部热特性.
结论:
- 模块化设计的散装超材料为宏观规模的热整形提供了一条可行的途径.
- 微观结构设计为可调节的热特性提供了足够的自由.
- 这种方法对下一代热管理系统充满希望.
相关概念视频
Heating and Cooling Curves
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
Thermal Sigmatropic Reactions: Overview
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred to as...
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred to as...
Thermal expansion and Thermal stress: Problem Solving
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.
Temperature Dependent Deformation
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added together...
Bending of Material: Problem Solving
In this lesson, determine the ratio of the maximum bending moments applied to two metal pipes, given that both pipes can withstand a maximum stress of 100 MPa. Both pipes have an outer radius of 1.8 cm. Pipe A has an inner radius of 1.5 cm, and Pipe B has an inner radius of 1 cm. The ratio of the maximum bending moment applied to two metallic pipes, each with a different inner and outer radius, is determined by considering their dimensions. The inner radius of the first pipe is 1.5 cm, and for...
Bending of Members Made of Several Materials
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...

