University of North Florida
College of Computing Engineering and Construction
EGN 3331: Strength of Material
Course Number:
EGN 3331
Course Name:
Strength of Material
Course Credit Hours: 3
Course Pre-requisites: EGN 3311 (statics)
Course Co-requisites: EGN 3331L (mechanical systems lab)
Meeting Time:
Tuesday and Thursday 50/1400
9:25 – 10:40 am
Course Website: www.unf.edu/~aschonni
Website will be used extensively for posting announcements, handouts, homework,
solutions and more.
E-mail:
Announcements may be sent to your UNF registered e-mail address during the semester.
If you prefer another e-mail address, make sure to either change it with the University or
have your e-mails forwarded to your preferred e-mail account.
Instructor:
Alexandra Schonning, Ph.D.
Office: Building 50, Room 3114
Telephone: 904.620.2357
Email: aschonni@unf.edu
Website: www.unf.edu/~aschonni
Office Hours:
Tuesdays and Thursdays 10.45 – 11.45am and 4.30 – 5.00pm
Text:
Mechanics of Materials, 5th Edition
William F. Riley, Leroy D. Sturges, Don H. Morris
John Wiley & Sons, Inc.
ISBN: 0-471-58644-7
Course Description:
In this course the concept of stress and strain is covered and includes topics such as
normal stress and strain, shear stress and strain, Hooke’s Law, and stress
transformation. Deformations in axially loaded members are included with some focus on
statically indeterminate members. Torsionally loaded members and flexural members
are covered. Shear and bending moment diagrams are emphasized with an introduction
to member design. Deflection of beams and buckling of columns is introduced.
Topics
1. Statics - review
2. Stress - concept and definitions;
3. Strain - concept and definitions;
4. Stress-strain relationships;
5. Axial loading;
6. Torsional loading;
7. Beams: stresses and deflections;
8. Statically indeterminate beams;
9. Theories of failure.
Methods of Evaluation
Homework
Quizzes
Midterm Exams
Final Exam
10%
10%
50% (25% each)
30%
Homework
Homework will be assigned during class times or on the web page or via e-mail.
Collection of homework will generally be biweekly and will be announced either
electronically or in class at least 2 days prior to collection. No late homework will be
accepted without prior arrangement. While homework will generally only be collected
biweekly it is highly recommended that homework problems be solved in a pace
consistent with the lectures. The homework must be neat and stapled in the upper left
hand corner.
Only a select few (at least one) of the turned in homework problems in each (biweekly)
homework set will be graded for correctness. The remaining homework problems will be
checked to ensure there was a serious attempt made in solving the problems. Your
homework grade for each set will be calculated according to the below equation. The
semester homework grade will be calculated by adding the grades obtained on each
homework set.
HW grade (for each set): {[X/Xmax + Y/Ymax]*1/2}*T
Where:
X: Points earned on problem(s) graded for correctness
Xmax: maximum number of points on problem(s) graded for correctness
Y: Number of problems for which you made a serious attempt and that were not
graded for correctness
Ymax: total number of problems assigned and not graded for correctness
T: Total number of problems in the homework set
Example: 6 problems are collected in one set. One problem is graded with a max score
of 8. You obtain 7 points on the graded homework problem and complete 4 more
problems successfully. Your HW grade for the set is then:
X = 7; Xmax = 8; Y = 4; Ymax = 5; T = 6
Grade = {[7/8+4/5]*1/2}*6 = 5.025
Quizzes:
Quizzes will be closed book and closed notes with the exception of approved formula
sheet. Each quiz is worth the same towards the final grade, unless differently specified.
Midterm Exam
Tests will be closed book and closed notes with the exception of approved formula sheet.
Final Exam
The final exam will be comprehensive. It will be closed book and closed notes with the
exception of approved formula sheet.
Letter Grades
A
B
C
D
F
90(+) – 100%
80(+) – 90(-)%
70(+) – 80(-)%
60(+) – 70(-)%
Less than 60%
Pledged work:
You may consult with your fellow students if you have difficulties with the homework
problems – in fact, discussion is encouraged. However, direct copying of the homework
problems from solutions of any kind will be deemed an honor violation. Each student is
expected to fully comply with the Honor Code: NO CHEATING IN ANY WAY OR
FORM. If a student is caught cheating, s/he will receive an AUTOMATIC F for the
course. Moreover, if a student sees someone else cheating, s/he should REPORT the
incident to the instructor. Plagiarism is of course considered a form of cheating.
Tentative Course Layout (subject to change by instructor)
Date
#
Topic
Reading
assignment
Homework assignments
1/6 (R)
1/11 (T)
1
2
1.1-1.5
2.2-2.5
Ch1: 24 30 32 45 74 71
Ch 2: 6, 7, 25, 40, 41, 49
1/13 (R)
1/18 (T)
1/20 (R)
3
4
5
2.6-2.7
2.8
2.9-2.10
Ch 2: 56, 63, 75
Ch 2: 88, 97, 103
Ch 2: 111, 117, 120,
130, 133
1/25 (T)
1/27 (R)
6
7
Statics REVIEW
Stress: normal, shear, stress on an inclined
plane
2D Stress
Stress transformation equations
Principal stresses, maximum shearing
stress, Mohr’s Circle
Continued
3D Stress
2.11
Ch 2: 141, 147, 150
2/1 (T)
8
2/3 (R)
2/8 (T)
2/10 (R)
2/15 (T)
2/17 (R)
9
10
11
12
13
2/22 (T)
14
2/24 (R)
3/1 (T)
15
16
3/3 (R)
17
3/8 (T)
3/10 (R)
3/22 (T)
3/24 (R)
18
19
20
21
3/15 (T)
3/17 (R)
3/29 (T)
3/31 (R)
4/5 (T)
4/7 (R)
22
23
24
25
4/12 (T)
4/14 (R)
4/19 (T)
4/21 (R)
4/26 (T)
26
27
28
29
Strain, Strain Transformations, Principal
Strains
Stress-Strain Relationships
Stress-Strain Relationships
REVIEW
Test 1
Axially loaded members, statically
indeterminate problems
Thermal effects,
Stress concentrations
Thin and thick walled cylindrical vessels
Torsion: shearing strain, shearing stress,
displacements
Statically indeterminate members;
combined effects: normal and shearing.
Review Ch 5 and 6
Test 2
Stresses in beams
Load, shear force, bending moments in
beams
SPRING BREAK: 3/14 – 3/18
SPRING BREAK: 3/14 – 3/18
Shearing stresses in beams
Beam deflections
Beam deflections: singularity functions
Beam deflections: Castigliano’s Theorem,
Statically indeterminate beams
Columns: buckling
Theories of failure for static loading
Continued
Review for final exam
Final Exam 9:00-10:50 pm on Tuesday
4/26 subject to change according to:
http://www.unf.edu/registrar/finals.html.
Ch 3: 5, 25, 37, 65
3.1-3.5
4.1 - 4.3
4.3 - 4.5
Ch 2, 3, 4
Ch 4: 2, 3, 9, 17, 18, 35
Ch 4: 44, 45, 50
5.1-5.4
Ch 5: 6, 9, 23
5.5, 5-7
5.9-5.10
6.1-6.4
Ch 5: 31,40,45, 58, 70,
75, 79
Ch 5: 109, 130, 135, 153
Ch6: 12, 18, 19, 26
6.5, 6.7-6.8
Ch6: 50, 82, 99, 104
7.1-7.4
7.5-7.6
Ch 7: 4, 6, 18, 19, 23
Ch 7: 31, 33, 41, 48, 60,
64, 73
7.7-7.8
8.1-8.4
8.5-8.6
8.8-8.9
Ch 7: 83, 88, 91, 96
Ch 8: 3, 30, 35, 39
TBD
TBD
9.1-9.4
10.6-10.8
TBD
TBD