接微球和粒子链的压力变形的实验和FEM模拟研究
Y Harkavyi1, K Giżyński2, Z Rozynek1,3
1Faculty of Physics and Astronomy, Adam Mickiewicz University, Uniwersytetu Poznańskiego 2, 61-614 Poznań, Poland. zbiroz@amu.edu.pl.
Soft matter
|May 12, 2025
概括
微型结构的机械压缩精确控制导电性. 接微粒子链比单个粒子需要更高的力,温度显著影响变形,正如约翰逊-库克模型预测的那样.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 纳米技术纳米技术
背景情况:
- 珠型微结构通过机械压缩提供可调节的电热导电性.
- 了解微粒变形对于制造先进电子元件至关重要.
研究的目的:
- 研究单个接微球和珠状微结构的压力机械性能.
- 分析颗粒大小,应变速率和温度对变形的影响.
- 验证模拟模型用于预测微观结构行为.
主要方法:
- 单微球和粒子链的实验压缩测试.
- 用有限元法 (FEM) 模拟来建模应力和变形.
- 约翰逊-库克 (J-C) 材料模型的应用和参数化.
主要成果:
- 与单个粒子相比,珠状结构表现出不同的机械反应,由于粒子间约束,需要更高的压力.
- 温度对压缩行为的影响比延展率更为明显.
- 该J-C模型准确地预测了跨不同应变速率和温度的实验结果.
结论:
- 机械压缩是一种有效的方法来控制珠状微观结构的导电性.
- 对接微粒变形的洞察对于电子元件制造有价值.
- FEM模拟和J-C模型为分析微结构力学提供了可靠的工具.
更多相关视频
11:28A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
12.4K
12:30High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus
Published on: April 3, 2018
18.7K
相关概念视频
01:12Temperature Dependent Deformation
127
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...
127
01:11Deformation of Member under Multiple Loadings
130
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
130