Dry Friction - Engineering Mechanics (Undergraduate Advanced)

Analysis of equilibrium of rigid bodies subjected to dry (Coulumb) friction, and its applications to screws, wedges, belts and bearings.

23

13 hrs

Payment required for enrolment
Enrolment valid for 12 months
This course is also part of the following learning track. You may join the track to gain comprehensive knowledge across related courses.
[OAU, Ife] MEE 205: Engineering Mechanics I - Statics
[OAU, Ife] MEE 205: Engineering Mechanics I - Statics
Comprehensive treatise of static equilibrium of particles and rigid bodies, with focus on the stability of machines and structures. Curated for second-year students of engineering and at Obafemi Awolowo University, Ile-Ife, Nigeria. Students and professionals with similar learning goal will also find this learning track useful.

Comprehensive treatise of static equilibrium of particles and rigid bodies, with focus on the stability of machines and structures. Curated for second-year students of engineering and at Obafemi Awolowo University, Ile-Ife, Nigeria. Students and professionals with similar learning goal will also find this learning track useful.

Course Chapters

1. Introduction
4

Welcome to the course and definition of terms - friction, dry friction, fluid friction, lubrication, etc.

Chapter lessons

1-1. Welcome
9:58

Welcome to the course, course outline, prerequisites and references.

1-2. Friction
23:06

Meaning of friction and how to identify problems involving friction.

1-3. Types of friction
5:52

Meaning of dry friction and fluid friction; meaning and use of lubrications.

1-4. Equilibrium
6:57

Review of the conditions and equations of equilibrium of particles and rigid bodies in two dimensions.

2. Laws of Dry Friction
4

Fundamental principles of dry friction - meaning of friction, coefficients of friction, angles of friction, etc.

Chapter lessons

2-1. Static and kinetic friction forces
7:18

Meaning of static and kinetic friction forces and when they are applicable in dry friction.

2-2. Static and kinetic friction coefficients
7:18

Meaning and use of coefficients of static and kinetic friction between surfaces in dry friction.

2-3. States of rest or relative motion
8:15

Different states of rest or relative motion between surfaces in contact, and the conditions for each state.

2-4. Angles of friction
38:12

Meaning and use of angles of static and kinetic friction, and angle of repose.

3. Problems Involving Dry Friction (1)
1
2

General analysis of problems involving dry friction - for particles.

Chapter lessons

3-1. Procedure
13:21

General procedure for analysis of problems involving dry friction - for particles.

4. Problems Involving Dry Friction (2)
1
3

General analysis of problems involving dry friction - for rigid bodies.

Chapter lessons

4-1. Procedure
12:58

General procedure for analysis of problems involving dry friction - for rigid bodies.

5. Wedges
1
2

Analysis of dry friction on wedges.

Chapter lessons

5-1. Procedure
13:06

Principles and procedure for analysis of frictional forces on wedges.

6. Screws
2
2

Analysis of dry friction on square-threaded screws.

Chapter lessons

6-1. Properties
23:30

Properties of square-threaded screws.

6-2. Procedure
34:02

General principles and procedure for analysis of frictional forces on square-threaded screws.

7. Belts
1
2

Analysis of frictional forces on flat belts.

Chapter lessons

7-1. Procedure
11:01

General principles and procedure for analysis of frictional forces on flat belts.

8. Thrust Bearings
1
2

Analysis of frictional forces on thrust bearings - collar bearings, pivot (end) bearings and disks.

Chapter lessons

8-1. Procedure
18:47

General principles and procedure for analysis of frictional forces on thrust bearings - pivot (end) and collar bearings, disks.

9. Journal Bearings
1
2

Analysis of frictional forces on journal bearings.

Chapter lessons

9-1. Procedure
25:47

General principles and procedure for analysis of frictional forces on journal bearings.

10. Wheels
1
2

Analysis of frictional forces (rolling resistance) on wheels.

Chapter lessons

10-1. Procedure
24:11

General principles and procedure for analysis of frictional forces (rolling resistance) on wheels.