C.5.ii Moment in 2D and 3D
Force on a particle creates translation, but force on a rigid body causes translation and rotation.
Moment: Tendency of rotation (a.k.a. torque),
M o=r
F
,
M o=rfsin=Fd
per
Saturday, September 17, 2016
B.2.ii Examples of Force Components
Vector Addition: Frame hanging on a wall
Vector Inequalities: Force at an angle on two beams
Saturday, September 17, 2016
B.2.iii Degrees of Freedom with
Equilibrium of Particles in 2D
Degrees of Freedom: The number of independent movements of a particle. For examples, combinations
of transla
Saturday, September 17, 2016
B.3.i Rectangular Components of a Force
and Unit Vectors
Cartesian Equation of a Force in Three Dimensions:
F =
F x i+
F y j+
Fz k
Unit Vectors: The variables i, j and k
Tuesday, September 20, 2016
C.4.i Free Body Diagrams, Internal and
External Forces
Rigid Body: An object that ideally does not deform, still has mass
External Forces: Actions on the body that can be e
Saturday, September 17, 2016
B.2.i Particles and Forces in a Plane
Particles: Bodies of small dimensions such that they can be idealized as points on which forces act.
Forces: Contain magnitude, line
Tuesday, September 20, 2016
C.5.i Vector Products of Two Vectors
Vector Product (Cross Product):
the result,
V =
P Q
where
V , is perpendicular to
P and
Q
V =PQsin
Direction is given by the RightHa
Tuesday, September 20, 2016
C.4.ii Principle of Transmissibility
If your car breaks down, you can either push the vehicle from the back to move it forward or pull it from
the front. Basically, you can
Saturday, September 17, 2016
A.1.ii Newtons Laws, Vectors and
Scalars, Systems of Units
Engineering Mechanics: learn to construct and solve mathematical models which describe the effect of
force on a
Saturday, September 17, 2016
A.1.iii Numerical Accuracy
Engineering Mechanics is not an exact science. Solution accuracy depends on:
Accuracy of given data
Accuracy of performed computations
In engine
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D
ConductionRadial System
Source: Fundamentals of Heat and Mass
Transfer by Incropera & DeWitt
1
Conduction
Cylindrical systems often experience
temperature gradients in the radial direction
only and
Source: Fundamentals of Heat and Mass Transfer by
Incropera & DeWitt
1
Source: Fundamentals of Heat and Mass Transfer by
Incropera & DeWitt
2
Source: Fundamentals of Heat and Mass Transfer by
Incroper
RADIATION TUTORIAL 2
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
A diffusely emitting surface is exposed to a radiation source causing the
irradiation on the surface t
Internal Flow
Source: Fundamentals of Heat and Mass
Transfer by Incropera & DeWitt
Hydrodynamic Considerations
Consider laminar flow in a circular tube of radius ro (Figure
1), where fluid enters the
Combustion Basics
Combustion
Any material that can be burned to release thermal
energy is called a fuel.
Most familiar fuels consist primarily of hydrogen and
carbon. They are called hydrocarbon fuels
Heat Transfer from Extended
Surfaces
Source: Fundamentals of Heat and Mass
Transfer by Incropera & DeWitt
1
Extended Surfaces
Consider the heat transfer between a solid surface and a moving fluid
as s
Radiationtutorial 1
1. Define the following terms:
(i)
Total emissive power
(ii)
Monochromatic emissive power
(iii) Emissivity
(iv) Intensity of radiation
2. Define the terms absorptivity, reflectivi
Convection Internal Flow
Question 1
Calculate the heat transfer coefficient for water flowing through a 25mm diameter tube at a rate of
1.5kg/s, when the mean temperature is 40oC.
For turbulent flow
convection
Source: Fundamentals of Heat and
Mass transfer by F. Incropera and D.
Dewitt
The Convection Boundary Layers
The Velocity Boundary Layer
The Convection Boundary Layers
The Thermal Boundary
UNIVERSITY OF MAURITIUS
FACULTY OF ENGINEERING
MECHANICAL & PRODUCTION ENGINEERING
DEPARTMENT
E443BEng (Hons) Mechanical Engineering (Minor: Energy Systems)
MECH 2012Y Mechanics of Materials II
Lab R
UNIVERSITY OF MAURITIUS
FACULTY OF ENGINEERING
MECHANICAL & PRODUCTION ENGINEERING
DEPARTMENT
E443BEng (Hons) Mechanical Engineering (Minor: Energy Systems)
MECH 2012Y Mechanics of Materials II
Lab R
By Assoc.
Dr R Boojhawon
Prof. R. Boojhawon
By Assoc.
Dr R Boojhawon
Prof. R. Boojhawon
By Assoc.
Dr R Boojhawon
Prof. R. Boojhawon
By Assoc.
Dr R Boojhawon
Prof. R. Boojhawon
By Assoc.
Dr R Boojhawon
10/31/2014
Example Hip Implant
Chapter 1  Introduction
With age or certain illnesses joints deteriorate.
Particularly those with large loads (such as hip).
What is materials science?
Why should we