横跨尺度的冰摩擦机制
Anderson Dalavale Kaiser Pinto1,2, Denis Mazuyer1,2,3, Juliette Cayer-Barrioz2
1Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, 69134 Ecully Cedex, France.
Soft matter
|March 16, 2026
概括
这项研究揭示了-冰相互作用中的三个不同的摩擦模式,由粘附,热量产生和热效应驱动. 多尺度模型准确地预测了界面剪切应力,这对于了解轮胎在冰面上的性能至关重要.
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
- 聚合物物理 聚合物物理
背景情况:
- 与冰的摩擦对于车辆的安全性和性能至关重要.
- 了解摩擦机制需要弥合宏观和分子尺度.
- 现有的模型往往无法捕捉粘附和热效应的复杂相互作用.
研究的目的:
- 为了研究SBR-弹性体和冰之间的多尺度摩擦机制.
- 开发一个用于-冰界面剪切应力的预测模型.
- 根据滑动速度和温度识别不同的摩擦模式.
主要方法:
- 在滑动过程中同时测量力和实际接触面积.
- 在一系列的速度 (50 μm s-1-1 m s-1) 和温度 (低至-30 °C) 中进行实验测试.
- 分析建模包括粘弹性粘附,界面加热和分子动力学 (Chernyak-Leonov).
主要成果:
- 确定了三种摩擦模式:粘附/分散主导,热生成主导,热驱动/融影响.
- 观察到真实接触面积的非单调的速度依赖性和钟形的剪切应力-速度曲线.
- 开发了一个无维度的平均接触温度,可以在各种条件下将数据正常化.
- 根据实验数据验证了一个多尺度模型,预测基于实验数据的界面剪切应力.
结论:
- 与冰的摩擦是由多个尺度的合粘弹性和热现象控制的.
- 开发的多尺度模型提供了精确的摩擦行为的预测.
- 了解这些机制是设计先进轮胎材料和改善冬季引力的关键.
相关概念视频
01:05Static and Kinetic Frictional Force
26.3K
One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
However, if two systems are in contact and are stationary relative to one...
26.3K
01:07Frictional Force
10.4K
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
10.4K
01:30Dry Friction
1.1K
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
1.1K
01:27Types of Friction Problems
1.0K
Friction is an essential concept in physics, engineering, and everyday life. It is the force that opposes the relative motion or tendency of such motion between two surfaces in contact. One of the most common types of friction encountered in various applications is dry friction. Dry friction problems can be broadly categorized into three types, each with unique characteristics and challenges.
The first type of dry friction problem involves situations where there is no apparent impending motion....
The first type of dry friction problem involves situations where there is no apparent impending motion....
1.0K
01:21Characteristics of Dry Friction
1.1K
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
1.1K
01:21Rolling Resistance
733
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
733