 

UP
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ENES 220  MECHANICS OF
MATERIALS
Spring 2003
Textbook:
Beer, Johnston, and DeWolf, Mechanics of Materials, 3^{rd.} ed.,
McGrawHill, 2002
Reference:
Riley, Sturges, and Morris, Statics and Mechanics of Materials, Wiley,
1995
Section 
Lecture 
Lec. room

Instructor 
Recitation 
Rec. room 
0101 
TuTh 8–8:50 
EGR 0110 
Fourney, W 
F 8–9:50 
CHE 2136 
0102 
MW 10–10:50 
EGR 0108 
Assakkaf, I 
F 10–11:50 
EGR 0110 
0103 
MW 10–10:50 
EGL 1202 
Cárdenas, J 
F 10–11:50 
CSS 2428 
0104 
MW 2–2:50 
EGR 1104 
Beigel, T 
F 2–3:50 
CHM 0122 
Office Hour Schedule for Spring 2003

Monday 
Tuesday

Wednesday 
Thursday 
Friday 
89 


Fourney 


910 
Cárdenas 

Cárdenas 
Zhao 
Cárdenas 
1011 



Zhao 

1112 
Assakkaf 

Assakkaf 
Zhao 

121 




Assakkaf 
12 
Assakkaf 

Assakkaf 


23 



Wang 

34 
Beigel 
Park 
Beigel 
Wang 

45 
Beigel 
Fourney / Park 
Beigel 
Fourney / Wang 

56 

Park 



(students can visit ANY of the instructors or
TA’s, regardless of assigned section)
Schedule for Lecture
Lec.

Date 
Sections

Topic

Homework

1 
W, 1/29 
1.11.13 
Introduction and review: stress 
1.13
1.15 1.37
1.40 
2 
M, 2/3 
2.12.7, 2.112.15 
Review: strain, material properties, and constitutive
relations 
2.1
2.63 2.65
2.68 
3 
W, 2/5 
2.8 
Rods: axial loading and deformation 
2.15
2.18 2.22
2.27 
4 
M, 2/10 
2.9 
Rods: statically indeterminate 
2.36
2.40 2.41
2.48 
5 
W, 2/12 
2.10, 2.18 
Rods: thermal stress; stress conc. 
2.51
2.53 2.59
2.100 
6 
M, 2/17 
3.13.5 
Shafts: torsion loading and deformation 
3.7
3.17 3.35
3.41 
7 
W, 2/19 
3.6 
Shafts: statically indeterminate 
3.53
3.54 3.56
3.58 
8 
M, 2/24 
3.73.8, 3.13 
Shafts: power; stress conc.; thinwalled 
3.72
3.85 3.90
3.140 
9 
W, 2/26 
4.14.5, 4.13 
Beams: bending stress 
4.4
4.10 4.27
4.145 
10 
M, 3/3 

Review for Exam #1 

11 
W, 3/5 
4.64.7 
Beams: composite beams; stress conc. 
4.43
4.48 4.56
4.74 
12 
M, 3/10 
5.15.2 
Beams: V and M diagrams (formula) 
5.1
5.5 5.14
5.15 
13 
W, 3/12 
5.3 
Beams: V and M diagrams (graphical) 
5.41
5.48 5.49
5.64 
14 
M, 3/17 
6.16.4 
Beams: shearing stress 
6.3
6.9 6.13
6.24 
15 
W, 3/19 
6.66.7 
Beams: shear flow; thinwalled 
6.30
6.31 6.36
6.39 
Monday, 3/24 To Sunday, 3/30 
 S P R I N G B R E A K  
16 
M, 3/31 
9.19.3 
Beams: deformation (integration) 
9.3
9.5 9.12
9.14 
17 
W, 4/2 
9.5, 9.6 
Beams: deformation (singularity) 
9.38
9.40 9.43
9.47 
18 
M, 4/7 
9.5 
Beams: statically indeterminate 
9.51
9.56 9.58
9.60 
19 
W, 4/9 
9.79.8 
Beams: deformation (superposition) 
9.68
9.74 9.84
9.92 
20 
M, 4/14 

Review for Exam #2 

21 
W, 4/16 
7.17.3 
Failure criteria: stress transformation 
7.5/9
7.7/11 7.16
7.17 
22 
M, 4/21 
7.4 
Failure criteria: Mohr’s circle 
7.31
7.33 7.38
7.39 
23 
W, 4/23 
7.57.6, 7.9 
Failure criteria: multiaxial stress states 
7.69
7.70 7.100
7.114 
24 
M, 4/28 
8.4 
Components: combined loading 
7.119
8.31 8.32
8.37 
25 
W, 4/30 
8.4 
Components: combined loading 
8.39
8.42 8.47
8.51 
26 
M, 5/5 
10.110.3 
Columns: buckling (pinned ends) 
10.10
10.11 10.14
10.17 
27 
W, 5/7 
10.4 
Columns: buckling (different ends) 
10.19
10.21 10.25
10.27 
28 
M, 5/12 
Varies 
Advanced topics in mechanics 
Announced in class 
29 
W, 5/14 
Varies 
Advanced topics in mechanics 
Announced in class 

M, 5/19 
All material 
 Final Exam
 46 PM  location to be announced  
Website:
https://www.ajconline.umd.edu/
ENES220: Mechanics of Materials (Portal) – Spring, 2003
Notes:
·
Problems are assigned from the
textbook
·
Homework due on Monday includes
all problems assigned during the previous week
·
Homework policy is explained in
more detail below
Schedule for Recitation
Rec.

Date 
Problem Session

Project
Session

1 
F, 1/31 
Sections 1.11.13 
Project description and
team questionnaire 
2 
F, 2/7 
Sections 2.12.8, 2.112.15 
Discussion of project
guidelines 
3 
F, 2/14 
Sections 2.92.10, 2.18 
Group assignments / Project
guidelines finalized 
4 
F, 2/21 
Sections 3.13.6 
Team meetings 
5 
F, 2/28 
Section 3.73.8, 3.13, 4.14.5, 4.13 
Torsion test demo / Team
meetings 
6 
F, 3/7 
 EXAM #1  
7 
F, 3/14 
Sections 4.64.7, 5.15.3 
Torsion test demo / Team
meetings 
8 
F, 3/21 
Sections 6.16.4, 6.66.7 
Team meetings 
Monday, 3/24 To Sunday, 3/30 
 S P R I N G B R E A K  
9 
F, 4/4 
Sections 9.19.3, 9.6 
Team meetings 
10 
F, 4/11 
Section 9.5, 9.79.8 
Beam demo / Team meetings 
11 
F, 4/18 
 EXAM #2  
12 
F, 4/25 
Sections 7.17.6, 7.9 
Beam demo / Team meetings 
13 
F, 5/2 
Sections 8.4, 10.110.4 
Crane demo / Team meetings 
14 
F, 5/9 
Problems: Advanced topics 
Course review 





Grading Policy:
Homework / Quizzes / Class part....... 20%
All exams & quizzes are closed book/notes
Design project.................................. 15%
and given during recitation
Exam #1.......................................... 20%
Exam #2.......................................... 20%
Final exam....................................... 25%
Final exam: Monday, May 19, 46 PM

100%
Course Expectations:
Mechanics of Materials is used to answer two questions: (1) Is the material
strong enough? and, (2) Is the material stiff enough? That’s it.
Coincidentally, as an engineer, those are the two questions you want to answer
whenever you design something. If the material is not strong enough, your
design will break. If the material isn’t stiff enough, your design
probably won’t function the way it’s intended to. Accordingly, we will
learn how to answer these questions in this course.
The lecture section meets each
week on MW or TuTh. With only a short time to focus on the material, it is
vital that these sessions start on time. Everyone is asked to arrive and
be seated promptly, to minimize the disruption to others. The recitation
section meets on Friday. This session will be conducted in two parts.
The first part will consist of problem solving, discussing homework solutions,
and providing occasional interactive classroom demonstrations. Periodic
quizzes will also be held during this time. The second part will be
devoted to the design project. During this period, students are expected
to meet in groups and perform tasks necessary for completing the project.
Occasionally, lectures and demonstrations will be given on material related to
the project. The activities for each session are listed in the recitation
schedule above. It is anticipated that the recitation time will be divided
evenly between the problem session and the project session.
Students are expected to
regularly attend both the lecture and recitation periods. An attendance
sheet will be circulated at the beginning of each class session, which will be
kept as a partial record of your class participation.
Homework Policy:
Homework will be assigned as the material is covered and will be collected every
Monday at the beginning of the lecture period, starting on 2/3.
Assignments turned in late will be docked 10% for each day it is late past the
original due date. Homework will be returned during the Friday recitation
period later that week. Solutions will be available from the TAs and on
the class website after the problems are returned. No assignment will
be accepted after the answers have been posted. Students are
encouraged to discuss and formulate solutions to the problems by working in
teams. However, assignments must be completed and submitted
individually. Simply copying the answers from another student or from a
solutions manual is not acceptable and will not be tolerated.
Guidelines for homework are given below:
1.
Use good quality paper, such as engineering graph paper or collegeruled
paper, any color, with no spiral edges
2.
Write on only one side of the paper
3.
Either pen or pencil is acceptable
4.
Include your name, section, and page number (e.g. 1/3 means 1 of 3) on
each sheet
5.
Staple all pages together in the upper left corner
6.
Neatly box all answers, and include appropriate units for numerical
answers
7.
Show all work (e.g. no work means no credit will be given)
If the above guidelines are not followed, the TA will
either reject the assignment outright, for extreme cases, or deduct points for
items that do not conform to the specifications.
Quiz Policy:
Quizzes will be periodically given throughout the semester. Quiz problems
will strictly come from class examples, book examples, or homework problems
verbatim. As long as you know how to complete these problems, you are
guaranteed to do well on the quizzes. Quizzes will be administered during
the recitation periods.
Design Project:
The
project consists of completing a design and analysis of an overhead crane
structure. The details are given on a separate sheet, and will be
described during the recitation periods. Students will work in teams of 4
or 5 to complete the assignment. The deliverable will be a comprehensive
final report, which includes analyses of the structural members, technical
drawings, and an explanation of your design decisions. Grades will be
based on the completeness and professional quality of the report and drawings,
as well as the accuracy of the technical analyses. Part of your grade will
be based on the group design report, and the remainder will be based on your
individual participation in the group project. Therefore, grades could
vary among members of the same team. A student that does NOT contribute
to the project will receive a grade of
“zero” for the entire project grade.
Computer Facilities:
An open computer lab located in JMP 1110 can be used for classrelated
activities. Standard software (i.e. MS Word, Excel, etc.) is available, as
well as more advanced drawing packages.

