MULTIPLE CHOICE PROBLEMS 110 Points each!
1. A stepped shaft ABC!) consisting of solid circular segments is subjected to three torques as shown in
the Figure. The maximum shear stress, TM, in the shaft is most nearly:
a 5.66 kSi _ ,
,- 187 kSi 07 m r4
(C)
r
WORK : Figure shows a force F acting on a particle at A which
r
moves along the path. The position vector r measured from
some convenient origin O locates the particle as it passes point
r
A, and dr is the differential displacement from A to A. The
work
UNIVERSITY COLLEGE DUBLIN
NATIONAL UNIVERSITY OF IRELAND, DUBLIN
An Colaiste Ollscoile Baile Atha Cliath
Ollscoil na hEireann, Baile Atha Cliath
SUMMER EXAMINATIONS 2005
ENBDF0002, ENBDF0005, ENBDF0008
SECOND ENGINEERING EXAMINATION
(Agricultural and Food
ABSOLUTE MOTION ANALYSIS
Todays Objective:
Students will be able to:
1. Determine the velocity and acceleration
of a rigid body undergoing general plane
motion using an absolute motion
In-Class Activities:
analysis.
Check Homework
Reading Quiz
Applicat
11-13. The shaft shown in Figure P11.13 is to be supported by two bearings, one at location A and the other
location B. The shaft is loaded by a commercial-quality driven helical gear (see Chapter 15) mounted as shown.
The gear imposes a radial load of 70
SOLUTION (15.27)
Known: Three spur gears transmit power from a motor shaft to a machine shaft in a
given geometric arrangement. The middle gear acts as an idler and is supported by
two bearings.
Find:
(a) Determine the radial load on idler shaft bearings
CE361- SPRING 2017: Structural Analysis 1
HW #1 Individual Work (50 points)
Due: 01/25/2017 (Before Start of the Class)
Name: _
Note: This work should be an individual effort and follow the guidelines provided in the
course details for your assignments.
1
Torsion of statically indeterminate circular shafts
(Strength of Materials - II, Final Exam-39-4, 14-06-2005)
Problem :
The solid cylinders AB and BC are bonded together at B and attached to fixed supports at A and
C. Knowing that AB is made of steel (G =
CE361- SPRING 2017: Structural Analysis 1
HW #2 Individual Work (100 points)
Due: 02/01/2017 (Before Start of the Class)
Name: _
1. Note 1: Submit on an engineering sheet with neat drawings and calculations.
2. Note 2: This work should be an individual ef
STRENGTH OF MATERIALS II 38 - 5
Unsymmetric bending
The angle between the axis of the bending moment
vector and the neutral axis is
tan =
I zz
tan
I yy
tan =
1.167 106
tan ( 15 ) = 0.06526
4.7917 106
= 3.73o
The angle that the neutral axis forms with th
Mechanics of machines
Muhammad Arif
1
Course Outline
ME-312 Mechanics of Machines (3,1)
Friction between unlubricated surfaces, screw threads and
efficiency, friction of pivot, collar and conical bearing, cone, plate
and centrifugal clutch, belts and rope
Engineering
Management
Assistant Prof. Dr. Korb Srinavin
1
(Budgeting and
BUDGET FOR CONSTRUCTION PROJECTS
Estimates)
In all organizations, a construction project is a capital
investment project. Budgeting for the project will, therefore,
be different fr
Mechanism
Machines are mechanical devices used to accomplish
work. A mechanism is a heart of a machine. It is the
mechanical portion of the machine that has the
function of transferring motion and forces from a
power source to an output.
Mechanism is a sy
ENGINEERING MANAGEMENT
IE 256
[email protected]
Dr.B.G.Cetiner
Course Outline
Understanding
Principles of Engineering Management
Applications of these Principles in Engineering Organizations
Learning
The importance of management to engineers,
Various fo
What are Engineering Management
Skills?
Engineering Management requires a combination of
both technical skills and soft skills.
1
Technical skills: designing software, testing, writing code
Soft skills: team building, communicating, decision making,
impro
Mechanics of machines
Muhammad Arif
1
Screw jack (Screw friction
1. Helix. It is the curve traced by
a particle, while describing a
circular path at a uniform speed
and advancing in the axial direction
at a uniform rate. In other words, it is
the curve tr
Mechanics of machines
Muhammad Arif
1
Friction Clutches
A friction clutch has its principal application in
the transmission of power of shafts and
machines which must be started and stopped
frequently.
Its applications are
Power is to be delivered to mach
Mechanics of machines
Muhammad Arif
1
Over Hauling and Self Locking
Screws
As We Know
= Angle of Friction
= Angle of Helix
if < , then torque required to lower the load will
be negative . Such a condition is known as over
haulding of screws
2
Over Hauli
F-10-A
Mechanics of Materials
LECTURE-10
?-10-2012
PROFESSOR DR. M. AFZAL KHAN
Thin-Walled Pressure Assumptions
Several assumptions are made in this
method.
1) Plane sections remain plane
2) r/t 10 with t being uniform and
constant
3) The applied pressure
F-10-A
Mechanics of Materials
LECTURE-9
11-10-2012
PROFESSOR DR. M. AFZAL KHAN
Creep and Fatigue
In the preceding lectures
it has been suggested
that failure of materials
occurs when the
ultimate strengths have
been exceeded.
Plastic Deformation
excessive
F-10A
Mechanics of Materials-1
LECTURE-15
5
-11-2012
PROFESSOR DR. M. AFZAL KHAN
Stress-element and
plane stress
General stress state at a point:
At each point in a loaded
material body the stress can
be characterized by a stress
element which shows the
s
F-10-A
Mechanics of Materials-1
LECTURE-11
18-10
-2012
PROFESSOR DR. M. AFZAL KHAN
Changes in
dimensions:
(a) Change in length
The change in length of
the cylinder may be
determined from the
longitudinal strain by
neglecting the radial
stress.
From Hookes
Mechanics of Materials
LECTURE-1
6-9-2012
PROFESSOR DR. M. AFZAL KHAN
References:
1- Strength and fracture of engineering
solids. David K. Felbeck & A. G. Atkins,
Prentice Hall (1995)
ISBN: 9780138561130
2- Mechanics of materials (An
Introduction to the M
F-10-A
Mechanics of Materials
LECTURE-7
4-10-2012
PROFESSOR DR. M. AFZAL KHAN
If the bar is free to expand
the change in length would
be given by
L=Lt
Then the new length L will
be:
L = (L + L ) = L+ L t
= L (1 + t)
Compressive thermal stresses
If this ex
F-10-A
Mechanics of Materials
LECTURE-8
5-10-2012
PROFESSOR DR. M. AFZAL KHAN
Toughness
Toughness is defined as:
the ability of a material to
withstand cracks,
In other words to prevent
the transfer or propagation
of cracks across its section
hence causi
The difference between
and becomes less and
less as the angle (in
radians) becomes small.
This is since the
tangent of an angle,
given in radians, can
be approximated by
the angle for small
values of the angle.
In most structural
materials, the shearing
Brittle versus Ductile behavior
Brittle materials fail at small strains
and in tension. Examples of such
materials are glass, cast iron, and
ceramics.
Ductile materials fail at large strains
and in shear. Examples of ductile
materials are mild steel, alum
F-10-A
Mechanics of Materials
LECTURE-4
14-9-2012
PROFESSOR DR. M. AFZAL KHAN
Linear-Elastic
Response
Linear-elastic response:
and
Factor
of
Safety
Hookes law:
In the linear elastic portion of
the response of material one
can model the response by
Hookes
F-10-A
Mechanics of Materials
LECTURE-5
20-9-2012
PROFESSOR DR. M. AFZAL KHAN
Therefore, the factor of safety
is a number greater than unity
(n>1). The allowable stress for
a given material is the
maximum stress the material
can take (normally the
ultimat