School of Engineering
SYLLABUS
ENGR 320: Mechanical Design
(Required Course)
Fall 2014
Instructor:
William F. Pratt
Office:
Riverfront 207B
Phone:
(309) 762-9481 Ext # 62783
E-mail:
wf-pratt@wiu.edu
Office Hours: M/W 12:30-2:00, T 12:30-1:30; F 9:00-5:00 (when available)
Class Schedule: M/W: 11:00-12:15 PM
Location:
Riverfront 222
CATALOG DESCRIPTION
Mechanical design, including an overview of the design process, engineering mechanics, failure
prevention under static and variable loading, bearings, transmission elements, lubrication, and
characteristics of the principal types of mechanical elements. Includes use of engineering
software to simulate and analyze. (3 s.h.)
COURSE PREREQUISITES
Prerequisite: ENGR 105, ENGR 251, ENGR 211 or Statics.
REQUIRED TEXTBOOK
Mechanical Engineering Design, Budynas & Nisbett, 10th Ed., McGraw Hill; URL for
SmartBook & Connect: http://connect.mheducation.com/class/w-pratt-fall-14-1; ISBN
9781259275944; To connect to the McGraw-Hill SmartBook and Connect go to WesternOnline
and click on “MH Connect” in the Navbar. See “Book Options” in the Course organization
section.
OTHER REFERENCES
Machinery’s Handbook, 29th Ed., Industrial Press; other items will be given in handouts as
required.
The Mayfield Handbook of Technical and Scientific Writing, L. C. Perelman, J. Paradis, and E.
Barrett, MIT. Free on the internet at: http://www.mhhe.com/mayfieldpub/tsw/home.htm
COMPUTER/SOFTWARE SKILLS
Selected software Engineering Equation Solver (EES), Microsoft office: Word, Powerpoint,
Excel.
TOPICS COVERED
Load Determination & Analysis
Materials and Processes
Stress, Strain, and Deflection
Static and Fatigue Failure Theories
Screws, Fasteners, and Weldments
Springs
Bearings and Lubrication
Gears
Shafts, Keys, and Couplings
Design Problems
COURSE LEARNING OBJECTIVES AND RELATIONSHIP TO PROGRAM
OUTCOMES (ABET Criteria 3a-3k)
ENGR 320
Outcome-Related Course Learning Objectives
Student Outcomes
3a 3b 3c 3e 3f 3g 3k
Determine the stress, strain and deflection of simple machine
elements
H
M
L
Apply the fundamentals of stress analysis, theories of failure and
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material science in the design of machine components
M H
L
Design for stress concentrations due to axial, shear, bending and
torsional loads.
H
M
M M
L
Design for an appropriate factor of safety for brittle and ductile
materials
M M
M M
L
Calculate von Mises stresses for multi-axial states of stress
H
M M
L
Design to avoid fatigue failure for fully reversed and fluctuating
cyclic loads for uni-axial and multi-axial states of stress.
H
M
M M
L
Determine fatigue stress concentration factors and determine
factors of safety when designing for infinite and finite life cycles
H
M
M M
M
Design of shafts for fatigue.
H
M
H
Determine the critical speeds of shafts (shaft vibration)
H
M H
Design journal bearings (sliding bearings)
H
H
H
L
L
M
Design rolling element bearings (ball and roller type bearings)
H
H
H
L
L
M
Design gears for serviceability (velocity ratio, torque ratio,
pressure angle,ect.)
H
H
H
L
L
M
H
L
L
L
CONTRIBUTION OF COURSE TO PROFESSIONAL COMPONENT
This course contributes to the engineering science component of the Engineering curriculum.
Prepared by: William F. Pratt
Date: 19 August 2014
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DISCLAIMER STATEMENT
Information contained in this syllabus, other than grading, late assignments, makeup work, and
attendance policies, may be subject to change with advance notice, as deemed appropriate by the
instructor.
COURSE ORGANIZATION
 Student Centered Learning Model
Students are expected to take appropriate responsibility for their own learning. We are
adopting McGraw-Hill’s LearnSmart texts (SmartBook) and Connect Plus. These are
designed to make the most of your time and help you learn the material. Use them. Do
your assignments on time and stay up with the class. You cannot put it off and expect to
pass the course. It will not happen.
 Textbook options
There are options for your purchase of textbooks for this course. All options include
“ConnectPlus” with access card. You will need this since all your assignments will be
submitted to the McGraw-Hill website. There is a link to it on the WesternOnline site
for this course and shown in the textbook section on page one. Use it!
Option 1 - ISBN: 1259290573 / 9781259290572
Loose Leaf for Shigley's Mechanical Engineering Design 10e with ConnectPlus
Access Card; Net Price: $189
Option 2 - ISBN: 0077591631/9780077591632
eBook and ConnectPlus Access Card; Net Price: $110
There is another option for a hardbound book with ConnectPlus but it’s more expensive. I
recommend you go for Option 1 because I’ve found it’s handy to be able to look up things
while you are on line.
You should go to the following website and get familiar with Connect and LearnSmart as
soon as possible: http://www.connectstudentsuccess.com/
 Lecture Format
The course consists of two 1 hr 15 min sessions per week. Class time will be spent mostly
explaining and discussing basic problem solving methods, solving relevant problems and
answering questions you may have about the assignments. It is impossible to
communicate the entire course content during the lecture period; hence you will have to
study course material on your own. Student participation in class discussions is
fundamental and therefore highly encouraged. The class time will also be used for
lab/project type activity when necessary.
 ConnectPlus LearnSmart
What is it? ConnectPlus with LearnSmart is an interactive text that enhances your
learning. You have four learning options: 1) Preview 2) Read 3) Practice and 4)
Recharge. You can Preview what the authors consider the most important material by
reading the highlighted (in yellow) text. Periodically you can Practice by answering
questions. For each question answered you are asked to rate your confidence. If you
answer every question correctly and are very confident of the correctness, you sail
through the assignment. For items you miss or are less certain of, the program will ask
additional questions until you master the material. The program adapts to you. Read is for
greater depth and for practicing the solution of the problems.
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Why are we using it? Because most students don’t read before they come to class and
don’t do Practice Problems and turn them in on time. As a result performance is low. We
assume you joined the program to become engineers. To become engineers you need to
learn the material. We think this is the best way to do it and studies bear this out. Connect
Plus will allow you to access your account as long as you have an internet connection.
You should go to the following website and get familiar with Connect and LearnSmart as
soon as possible: http://www.connectstudentsuccess.com/
READING, PRACTICE PROBLEMS (HOMEWORK), AND QUIZZES
Reading the text and doing problems are essential to learning this material and
developing professional engineering skills. In keeping with this, it is essential that you do
all the problems on your own. It's OK to discuss problems in a study group, or to talk
about something you are stuck on with a friend. However, in the end you must be able to
write up the solution to a problem from scratch, on your own. The use of instructor
solution manuals is not allowed, all work turned in MUST be the students own work.
Please see the supplemental handout for more detailed comments on homework format.
Because we are using ConnectPlus and Learnsmart, there will be no late submissions.
One of the advantages of this system is that it keeps track of your progress and on the
date/time it’s due submits what you have accomplished. (or so I’ve been told).
Practice problems: When you do your practice problems in ConnectPlus it instantly
grades them depending on what options I choose. The answers are generally multiple
choice so one disadvantage is that you don’t get to demonstrate the engineering methods
of problem solving with diagrams, etc. For this reason, each week you will be assigned at
least one design problem that you must solve on engineering paper, using the format
provided, in a professional presentation. It will be submitted electronically to the
Desire2Learn drop box and graded manually.
If in the course of doing your Connect Practice Problems you get to a point where you are
certain the answer you have is correct and you want to challenge it, do the following: 1)
click on “Report a Problem” on the question. 2) scan your homework (engineering paper
version) and turn it in to the drop box on WesternOnLine. 3) if you are correct, you will
get full credit.
Quizzes will be given in ConnectPlus or in class.
Class Attendance
You are expected to attend class and are responsible for notes, homework assignments,
projects, and exams/quizzes missed while being absent. Medical or family emergencies
should be discussed as soon as possible with the instructor, preferably before classes, test,
etc. are due.
Due Dates
All homework is due before the beginning of class. Most of the time this will be set
electronically by ConnectPlus or Desire2Learn on WesternOnline. Unless prior
arrangements are made, late work will not be accepted. In order to understand the course
material it is imperative for you to sharply focus on the problem solving in the
professional practice assignments.
Cell-Phones, pagers, computers, etc.
Cellular phones, pagers, two-way radios, & all other forms of electronic communication
devices, if carried into the classroom, must be completely turned off. Unless specifically
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requested by the instructor, do not use any computers in class.
Food and Drink, Classrooms. Regardless of what other departments may or may not
allow, Engineering students will not bring food or drink into laboratories, classrooms, or
lectures. No exceptions.
Exam Content
The best preparation for the exams will be to thoroughly understand/review the practice
problem assignments, review text readings, and keep a complete set of class notes.
Course Grade
The purpose of this course is to cause you to learn how to design mechanical structures.
As stated in “Student Centered Learning Model” above, you are the primary driver of
that learning. The grade breakout is designed to enhance your chances for success.
Grades will be based on the following breakout:
o Reading and doing the ConnectPlus/LearnSmart exercises before class including
the Recharge is 15% of your grade.
o Practice Problems done on line through ConnectPlus/LearnSmart and due
generally before the first class of the week is 20% of your grade.
o Quizzes done through ConnectPlus/LearnSmart on line or in class are 5% of your
grade.
o Design Problems and/or lab reports done on engineering paper once each week
and turned in to the dropbox on WesternOnline and due generally before the first
class of the week is 10% of your grade.
o There will be two midterms that will count as a total of 20%.
o The final will count for 30%.
o The grade levels are:
A
AF
93% - 100%
90%-93%
< 60%
B+
B
B-
87%-90%
83%-87%
80%-83%
C+
C
C-
77%-80%
73%-77%
70%-73%
D+
D
D-
67%-70%
63%-67%
60%-63%
GENERAL GUIDELINES
 Attend class. This is the single most important factor in student success and has been for
over 200 years.
 I strongly suggest that you read the material before it is covered in class and do the
example problems until you can do them without looking at the textbook.
 Do not wait until the last day to start working on your homework or prepare for an exam.
 If you are encountering difficulties with the course, please come and see me.
 Plan on spending at least 3 hours outside of class per lecture to read the text and work on
problem assignments.
 Utilize the office hours during the semester.
 There will be no make-up exams – except for a valid medical excuse or an absence based
on an approved school activity. Make sure you give me sufficient notice – more than 1
week – if you must be gone for an approved school activity.
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ACADEMIC INTEGRITY POLICY
Scholastic dishonesty will not be tolerated and will be prosecuted to the fullest extent. You are
expected to have read and understood the current issue of the student handbook regarding student
responsibilities & rights, policy information about procedures and what constitutes acceptable
on-campus behavior. See www.wiu.edu/policies/acintegrity.php for more information. Everyone
is expected to complete their own assignments.
Plagiarism and/or use of solution manuals on assignments are strictly forbidden and will not be
tolerated. If you use the solutions manual you must attribute the use with footnotes on the
problem solution. In this case, the work is not your own and you will not get credit but at least
you aren’t plagiarizing. If you don’t put the footnote, you are plagiarizing so you lose either way.
Don’t do it. Students who have used the solutions manual have not learned the material and
cannot pass the exams. As a result, they fail the course.
AMERICANS WITH DISABILITIES ACT
In accordance with University policy and the Americans with Disabilities Act (ADA), academic
accommodations may be made for any student who notifies the instructor of the need for an
accommodation. For the instructor to provide the proper accommodations(s) you must obtain
documentation of the need for an accommodation through Disability Support Services and
provide it to the instructor. It is imperative that you take the initiative to bring such needs to the
instructor’s attention, as he/she is not legally permitted to inquire about such particular needs of
students. Students who may require special assistance in emergency evacuations (i.e. fire,
tornado, etc.) should contact the instructor as to the most appropriate procedures to follow in
such an emergency. Contact Disability Support Services at 309-298-2512 for additional support.
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Current as of: 10/28/2014
ENGR 320
Fall 2014
Course Outline
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Description
1
25-Aug Course Intro; Chapter 1
2
27-Aug Materials
2
3
Date
1-Sep
Read & Connect
Sign-in to connect; Ch 1
(due by 8-26, 1700 hrs)
Chapter 2, Sections 1-7
Labor Day, University
Closed
3
3-Sep Materials
Chapter 2, Sections 8 to
Chapter 1; Design 1 submit to D2L
end
4
8-Sep Load and Stress Analysis
Chapter 3, Sections 1-12 Chapter 2; Design 2 submit to D2L
5
10-Sep Load and Stress Analysis
Chapter 3, Sections 1320
6
15-Sep Deflection and Stiffness
Chapter 4, Sections 1-10 Chapter 3; Design 3 submit to D2L
7
17-Sep Deflection and Stiffness
Chapter 4, Sections 1117
8
22-Sep Failure due to Static Loading Chapter 5
9
24-Sep Working Quiz Day
Fatigue Failure, Dynamic
Loading
Fatigue Failure, Dynamic
1-Oct
Loading
Chapter 6, Sections 1-11
11
Chapter 6, Sections 1217
Design 4 submit to D2L
Chapter 5
12
6-Oct Fatigue Laboratory
Handout
13
8-Oct Fatigue Laboratory
Handout
14
13-Oct Review for Midterm
Chapters 1-6
Chapter 6
15
15-Oct Midterm
Chapters 1-6
Lab writeup (D2L)
16
20-Oct Shaft and Shaft Components Chapter 7
17
22-Oct Shaft and Shaft Components Chapter 7
18
27-Oct Bolted Connections
19
29-Oct
20
3-Nov Springs
Chapter 10
21
5-Nov Bearings
Chapter 11
22 10-Nov
Chapter 8
Lubrication and Journal
bearings
Chapter 12
23 12-Nov Gears - General
Chapter 13
24 17-Nov Spur and Helical Gears
Chapter 14
26
1-Dec Review for Midterm
Chapters 7-17
27
3-Dec Midterm 2
Chapters 7-17
28
8-Dec Power Transmission Study
Chapter 18
29 10-Dec Review for Final
16
30 15-Dec
Chapter 7
Welded and other permanent
Chapter 9
connections
Clutches and Brakes & Belts
Chapter 16 & 17
and pulleys
24-Nov Thanksgiving, No classes
26-Nov Thanksgiving, No classes
15
Chapter 4
10 29-Sep
25 19-Nov
14
1100-1215 MW
Room 222
Home Work Due This Lecture
FINAL EXAM 1000-1150
Room 320
The Book
Comprehensive
Chapter 8
Chapter 9 and 10
Chapter 11 and 12
Chapter 13 and 14
Chapter 16 and 17
Chapter 18