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Related Concept Videos

Dry Friction01:30

Dry Friction

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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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Characteristics of Dry Friction01:21

Characteristics of Dry Friction

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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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Types of Friction Problems01:27

Types of Friction Problems

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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....
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Static and Kinetic Frictional Force01:05

Static and Kinetic Frictional Force

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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.
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Frictional Force01:07

Frictional Force

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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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Frictional Forces on Flat Belts01:28

Frictional Forces on Flat Belts

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Flat belts are commonly used in various industrial applications for transmitting power from one pulley to another. When a flat belt is wrapped around a set of pulleys, it experiences different tensions at the driving pulley ends due to the friction between the belt and pulley surface. When the pulley moves in a counterclockwise direction, the tension T2 on the opposite side of the pulley where the belt is moving away from is higher than the tension T1 on the side where the belt is moving...
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The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults
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Discrete-element-method model for frictional fibers.

Jérôme Crassous1

  • 1Université Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France.

Physical Review. E
|March 18, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a discrete-element-method algorithm to simulate elastic fibers in frictional contact. The method accurately models fiber mechanics and contact interactions, validated against experiments and theory.

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Area of Science:

  • Computational mechanics
  • Materials science
  • Physics of granular materials

Background:

  • Simulating the mechanical behavior of elastic fibers, especially under frictional contact, is complex.
  • Existing models may not fully capture the interplay of elongation, bending, and torsion in fiber interactions.

Purpose of the Study:

  • To develop and present a novel discrete-element-method (DEM) algorithm for simulating elastic fibers in frictional contact.
  • To provide a robust computational tool for analyzing fiber behavior in scenarios involving multiple contact points.

Main Methods:

  • Fibers modeled as chains of cylindrical segments connected by springs, incorporating elongation, bending, and torsion.
  • Frictional contacts modeled using the Cundall and Strack method, commonly applied in granular material simulations.
  • Detailed discussion of simulation scales, contact determination, and tracking within the algorithm.

Main Results:

  • The algorithm successfully simulates elastic fibers with complex mechanical properties.
  • Demonstrated accuracy through comparisons with experimental data and theoretical predictions for various contact scenarios.
  • Validated the discrete-element-method approach for modeling fiber-frictional contact interactions.

Conclusions:

  • The presented DEM algorithm offers a reliable method for simulating elastic fibers in frictional contact.
  • The approach is suitable for scenarios ranging from few to many contact points.
  • This work advances computational modeling capabilities for fiber assemblies and granular materials.