从批量放松测量预测摩擦老化
1Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, Netherlands.
Nature communications
|June 17, 2023
概括
摩擦衰老,随着时间的推移,静态摩擦的增加,是由正常化的应力放松解释的. 这一发现允许使用散装材料特性预测粗接口摩擦.
科学领域:
- 部落学 (tribology) 是一个学科.
- 材料科学 材料科学 材料科学
- 表面物理 表面物理
背景情况:
- 静态摩擦随着接触时间的增加 (摩擦老化),影响静态与动态摩擦.
- 现有的理论将衰老归因于原子接触面积的膨胀,由于表面粗,很难量化.
- 摩擦并不总是与接触面积成正比的.
研究的目的:
- 了解粗表面摩擦衰老的基本机制.
- 建立基于材料性质的摩擦老化预测模型.
主要方法:
- 在摩擦接触时研究了表面度的正常应力放松.
- 与散装材料的应力放松相比,度的应力放松.
- 使用了两种聚合物,聚烯和聚四乙烯,用于实验验证.
主要成果:
- 表面度的正常应力放松与散装材料的放松相匹配,不论度大小或压缩.
- 证明了散装材料特性和摩擦老化行为之间的一致关系.
- 成功预测了粗接口的摩擦老化.
结论:
- 使用散装材料的特性,可以准确地预测摩擦老化.
- 这项研究为粗表面的摩擦老化提供了新的机理性理解.
- 这项工作对设计具有受控摩擦性能的材料有影响.
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