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Related Concept Videos

Dry Friction01:30

Dry Friction

865
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...
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Friction: Problem Solving01:21

Friction: Problem Solving

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Friction is an essential force that influences the motion of objects in daily life. Depending on the situation, it can be either beneficial or problematic. Consider a bus with a mass of three megagrams and its center of mass at a specific point, moving along a banked road at a constant speed. The coefficient of static friction between the tires and the road is 0.5. Find the maximum angle of the banked road at which the bus would not slip or tip.
Initially, a visual representation of the...
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Rolling Resistance01:21

Rolling Resistance

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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...
575
Characteristics of Dry Friction01:21

Characteristics of Dry Friction

922
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...
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Frictional Force01:07

Frictional Force

9.5K
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...
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Kinetic Friction01:26

Kinetic Friction

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Consider a truck trying to pull a stationary car. As the truck exerts a force on the car, static friction is created at the point of contact between the two surfaces. This frictional force resists the car's movement and keeps it at rest. However, when the applied force by the truck surpasses the limiting static frictional force, an interesting phenomenon occurs. The frictional force at the interface reduces to a lower value, known as the kinetic frictional force. At this point, the car...
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Related Experiment Video

Updated: Jan 3, 2026

Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall
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Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall

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Finite Element Method-Based Skid Resistance Simulation Using In-Situ 3D Pavement Surface Texture and Friction Data.

Yi Peng1, Joshua Qiang Li2, You Zhan1

  • 1School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China.

Materials (Basel, Switzerland)
|November 27, 2019
PubMed
Summary

This study developed a finite element method (FEM) simulation for predicting roadway skid resistance using 3D pavement texture data. It calibrates friction parameters, improving simulation accuracy for enhanced road safety.

Keywords:
binary search back-calculation approachfinite element methodpavement textureprincipal component analysis regressionskid resistance

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Area of Science:

  • Pavement Engineering
  • Road Safety Analysis
  • Computational Mechanics

Background:

  • Skid resistance is crucial for roadway safety, necessitating accurate prediction methods.
  • Current numerical simulations for skid resistance often rely on assumed friction parameters.
  • Bridging the gap between pavement texture and simulation inputs is essential for reliable predictions.

Purpose of the Study:

  • To develop a finite element method (FEM)-based simulation framework for skid resistance prediction.
  • To integrate in-situ 3D pavement surface texture and skid resistance data into the simulation.
  • To determine accurate interface friction parameters for FEM simulations.

Main Methods:

  • Reconstructed 3D pavement surface models from high-resolution texture data.
  • Implemented an exponential decay friction model with a binary search back-calculation approach for parameter determination.
  • Utilized Butterworth filtering to separate texture into macro- and micro-scales and calculated areal texture indicators.
  • Conducted Principal Component Analysis (PCA) regression to correlate texture characteristics with friction parameters.

Main Results:

  • Developed a validated FEM framework for skid resistance simulation.
  • Successfully determined interface friction parameters using a back-calculation method based on observed skid numbers.
  • Quantified the relationship between pavement texture characteristics (macro- and micro-scale) and interface friction parameters.

Conclusions:

  • The developed FEM framework provides a more objective approach to skid resistance simulation.
  • Accurate friction parameter determination using in-situ data enhances simulation reliability.
  • Understanding the influence of pavement texture characteristics improves the preparation of simulation inputs for FEM.