ME264
ME264
Spring 2004
– Strength of Materials
Spring 2004
T R 9:30 - 10:45am – MKN 114
Instructor:
E-mail:
Web Page:
Office:
Phone:
Office Hours:
Dr. David Babcock
dbabcock@ycp.edu
goose.ycp.edu/~dbabcock/ME264/index.html
MKE 115
815-6442
M 12-2; T 11-12, 1-2; R 11-12; or by appointment
Course Description:
The primary objective of this course is to provide the engineering student with the means
of analyzing and designing various machines and load-bearing structures. Students begin
by studying the basic concepts of loads, displacements, stress, strain and deformations in
solids. From there, topics of study include the laws of elasticity, properties of engineering
materials, the analysis and design of bar-type members subject to axial loading, torsion,
bending, shear and combined loading, the principle of superposition, pressure vessels,
plane stress, plane strain, instability, and buckling. Euler's column theory, and energy
methods.
Prerequisites:
ME250 – Statics
Text:
Beer, Johnston, and DeWolf. Mechanics of Materials, 3rd Edition. McGrawHill, 2002.
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ME264
Spring 2004
Course Objectives:
• Introduce the concept of stress due to axial, torsional, and bending loads.
• Compute the displacements (strain) due to various loadings.
• Draw shear and moment diagrams to analyze stresses in beam members.
• Use Mohr’s circle to transform stresses to different material planes.
• Utilize singularity functions to represent stress and strain across a member.
• Determine buckling in columns using Euler’s formula.
Grading Policy:
Grades will be based on a combination of homeworks, 3 exams, and a comprehensive
final.
•
•
•
Homeworks – 20%
3 exams – 60% (20% each)
Final exam – 20%
No make-up exams will be given without approval of the instructor prior to class
unless proof of extreme emergency or illness is provided. All exams will be closed
book. A student earning better than 90% on all three exams may elect to not take the
final (in which case the final exam grade will be the average of the other three exams).
Homework will be collected at the beginning of class on Thursday for all problems
assigned in the previous week. Late assignments will not be accepted. All homework
must be done neatly on Engineering Computation paper (available in the bookstore) in a
format similar to the sample problems in the textbook. Each student will be allowed to
drop one homework assignment.
Grading Scale
Range Grade
100-90
89-80
79-70
69-60
59-0
4
3
2
1
0
Attendance Policy:
Students are expected to attend all scheduled classes and read the appropriate text
material prior to class. If a student must miss a class, it is his responsibility to notify the
professor prior to class. Students are responsible for all material covered in class.
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ME264
Spring 2004
York College Academic Integrity:
Students are expected to maintain their integrity at all times. Although cooperative
learning is strongly encouraged, all work submitted for grading must be a reflection of
your knowledge of the subject. Academic dishonesty includes, but is not limited to,
plagiarism; cheating; fabrication of results, information, or references; submission of
another’s work as one’s own; or tampering with the work of another. Cheating on
assignments and/or examinations will result in a “0” at minimum for all involved work
and possible removal from the course at the discretion of the professor. A written report
of the circumstances and disciplinary action will be provided to the student along with a
copy forwarded to the Dean of Academic Affairs which may result in suspension from
the college for repeat offenses. Students have the right to challenge any such actions
through the normal appeals procedure.
York College Communication Standards:
York College recognizes the importance of effective communication in all disciplines and
careers. Therefore, students are expected to competently analyze, synthesize, organize,
and articulate course material in papers, examinations and presentations. In addition,
students should know and use communications skills current to their field of study,
recognize the need for revision as part of their writing process, and employ standard
conventions of English usage in both writing and speaking. Students may be asked to
further revise assignments that do not demonstrate effective use of these communication
skills.
Disclaimer:
This syllabus is subject to change by the instructor.
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ME264
Spring 2004
Tentative Course Outline
Week
Topic
Jan 22
Stress
Introduction
Axial, Shear, and Bearing Stresses
Factor of Safety
Strain
Hooke’s Law and Modulus of Elasticity
Poisson’s Ratio
Stress Concentrations
Reading
Assignment
Ch. 1
1.1-1.4
1.5-1.10
1.11-1.13
Ch. 2
2.1-2.10
2.11-2.12, 2.14-2.15
2.17-2.19
Torsion
Stresses and Deformations
Angle of Twist
Transmission Shafts
Bending
Elastic Deformations
Members of Several Materials
Ch. 3
3.1-3.4
3.5-3.6
3.7-3.8
Ch. 4
4.1-4.5
4.6
Jan 27-29
Feb 3-5
Feb 10-12
Feb 17-19
Feb 24-26
Exam I(Ch. 1-3) Feb 24 During Lab Period
Stress Concentrations
Eccentric Loading
Unsymmetric Bending
Mar 2-4
Mar 9-11
Mar 16-18
Mar 23-25
4.7
4.12
4.13-4.14
No classes – Winter Break
Analysis and Design of Beams
Shear and Moment Diagrams
Singularity Functions for Shear and Moments
Shear in Beams and Thin Walled Members
Shear in Beams
Shear in Thin Walled Members
Transformations of Stress and Strain
Stress Transformation
Mohr’s Circle
Mar 30-Apr 1
Exam II(Ch. 4-6) Mar 31 During Lab Period
Apr 6-8
3-D Stresses
Pressure Vessels
Deflection of Beams
Deflection of Beams
Statically Indeterminate Beams
Ch. 5
5.1-5.4
5.5
Ch. 6
6.1-6.4
6.6
Ch. 7
7.1-7.3
7.4
7.5-7.8
7.9
Ch. 9
9.1-9.3
9.5
No class Apr 8 – Spring Break
Apr 13-15
Singularity Functions for Slope and Deflection
Superposition
4
9.6
9.7-9.8
ME264
Spring 2004
Apr 20-22
Columns
Euler’s Formula
Centric Loading
Eccentric Loading
Apr 27-29
Exam III(Ch. 7,9-10) Apr 28 During Lab Period
May 4-6
May 10-14
Principle Stresses
Principle Stresses
Combined Loading
May 6 – Review for Final
FINAL EXAM-Thursday May 13 8:00-10:00am
5
Ch. 10
10.1-10.4
10.6
10.7
Ch. 8
8.1-8.3
8.4