Syllabus for ME3213

Mechanics of Materials

Spring,2012

Course Information

Instructor:Dr.Maurizio Porﬁri

Email:mporﬁri@poly.edu

Oﬃce:RH507

Phone:718-260-3681

Oﬃce Hours:Thursday 12:00-12:55

Lecture:Tuesday 11:00-12:25 RH200

Thursday 11:00-12:25 RH200

Webpage:My Poly

Course Goals

Mechanics of Materials is a ﬁrst course in the understanding of solid body mechanics.It is essential for

the prediction of structural failure in any industry application.This course is the pre-requisite to Machine

Design and any further study in deformable mechanics.The objectives of the course are to:

Understand the concepts of stress and strain,normal stress and strain,shear stress and strain,general

state of stress,and design of simple connections

Understand stress analysis,materials’ behavior,constitutive relationship,Hookes law,stress concen-

tration,St Venant principle,transformation equations,and Mohrs circle

Learn about axially loaded members,torsion,change of length,angle of twist,transmission of power

by shafts,and statically indeterminate structures

Understand bending,shear and moment diagrams,shear force,transverse loading relationship,and

ﬂexure formulas

Learn the concepts of deﬂection of beams,diﬀerential equation of deﬂection curve,method of super-

position,and Castiglianos theorem

Prerequisites

MT2813,ME2213,MA2132;and ME3211 (co-requisite)

Required Text

(BJDM) Beer,F.P.,Johnston,E.R.,DeWolf,J.T.,and Mazurek,D.F.,Mechanics of Materials,Mc Graw

Hill,2011,6th edition

Homework

Homework will be assigned periodically.However,homework will neither be collected nor graded.Students

are responsible to do homework on their own.Homework solution will be presented in class.

1

Exams

There will be two mid-term exams and one ﬁnal.The exams will be administered in class and will test the

student’s comprehension and ability to apply material learned in class and through assignments.All tests

are in-class,closed book,closed notes.One formula sheet will be allowed for the exams and the ﬁnal.During

the exam,before beginning to solve assigned problems,students should brieﬂy restate the problem and list

the data given.Also,students should list the important concepts and formulae used to arrive at the ﬁnal

solution along with detailed work.Every page of every exam submission should have the student full name

and section number.Illegible work and loose sheets will not be graded.Students must complete the exam

on their own.If a student cannot attend an exam due to a medical condition,certiﬁed by a doctor,he/she

must notify the instructor in advance.Unexcused absence from an exam will result in a grade of 0 for that

exam.

Grading

This is a 3 credits course.

Policy

Homework:0%

Midterm Exam:30%

Midterm Exam:30%

Final:40%

Letter Grade Policy

A:90+,A-:87+,B+:83+,B:80+,B-:77+,C+:73+,C:70+,C-:67+,D+:63+,D:60+,F:<60.

Extra credit

There are no opportunities for extra credit.The grading policy allows for a “bad score”.

Class attendance and absences

There are no formal requirements for attendance,and there is no direct penalty for missing class.Students

are strongly encouraged to attend class since some course material may only appear in lectures.Students

that miss class are responsible for obtaining class notes from a classmate.

Honor system

The honor system is in strictly force for this course.It is assumed that all work submitted by a student is

done so under the honor system code.The ﬁnal exam must be completed individually.

ABET a-k criteria compliance

a

b

c

d

e

f

g

h

i

j

k

p1

p2

ME3213

X

X

X

X

X

X

2

(a) an ability to apply knowledge of mathematics,science,and engineering

(b) an ability to design and conduct experiments,as well as to analyze and interpret data

(c) an ability to design a system,component,or process to meet desired needs

(d) an ability to function on multi-disciplinary teams

(e) an ability to identify,formulate,and solve engineering problems

(f) an understanding of professional and ethical responsibility

(g) an ability to communicate eﬀectively

(h) the broad education necessary to understand the impact of engineering solutions in a global and

societal context

(i) a recognition of the need for,and an ability to engage in life-long learning

(j) a knowledge of contemporary issues

(k) an ability to use the techniques,skills,and modern engineering tools necessary for engineering practice.

(p1) an ability to apply principles of engineering,basic science,and math to model,analyze,design and

realize physical systems,components or processes

(p2) an ability to work professionally in both thermal and mechanical systems areas

Tentative Lecture Schedule

Lecture

Reading

Topic of the day

Lecture 1 (T)

24/1/12

1-10,30-32,and 54-66

Course overview,review of statics,and

introduction to normal stress and constitutive

behavior

Lecture 2 (TH)

26/1/12

26-30

Shearing stress and 3D stress (HWassignment)

Lecture 3 (T)

31/1/12

78-81 and 98-103

Shearing strain,statically indeterminate

problems,and in class solution of homework

Lecture 4 (TH)

2/2/12

82-87,93-94,and 694-700

HWsolution and problems involving temperature

changes,Poisson’s ratio,and strain energy

Lecture 5 (T)

2/7/12

113-120

Saint-Venant’s principle,stress concentration,

plastic deformation (HWassignment)

Lecture 6 (TH)

2/9/12

142-162

Torsion of shafts

Lecture 7 (T)

2/14/12

HWsolution

Lecture 8 (TH)

2/16/12

163-178,701-702

Statically indeterminate shafts,design of

transmission shafts,and strain energy for

shearing stress (HWassignment)

Lecture 9 (T)

2/21/12

HWsolution and review

Lecture 10 (TH)

2/23/12

Midterm exam

Lecture 11 (T)

2/28/12

222-236

Solution of midterm exam and pure bending

3

Lecture

Reading

Topic of the day

Lecture 12 (TH)

3/1/12

242-245,270-272,279-284

Unsymmetric bending,general case of axial

loading,and beams made of several materials

(HWassignment)

Lecture 13 (T)

3/6/12

316-323

HWsolution and shear and bending moment

diagrams

Lecture 14 (TH)

3/8/12

329-340,

Equilibrium equations and design of beams for

bending (HWassignments)

Lecture 15 (T)

3/20/12

701-702,716-718

HWsolution,bending energy,and impact loads

Lecture 16 (TH)

3/22/12

382-400

Shearing stress in beams (HWassignments)

Lecture 17 (T)

3/27/12

438-458

HWsolution and transformations of stress and

strain

Lecture 18 (TH)

3/29/12

462-466,478-480

General state of stress and stress in thin-walled

pressure vessels (HWassignment)

Lecture 19 (T)

4/3/12

467-472,514-522

Failure criteria and principal stresses

Lecture 20 (TH)

4/5/12

467-472,514-522

Solution of HWassignment

Lecture 21 (T)

4/10/12

486-496

Review

Lecture 22 (TH)

4/12/12

Midterm exam

Lecture 23 (T)

4/17/12

550-561

Deﬂection of beams (HWassignment)

Lecture 24 (T)

4/19/12

561-570,580-589

Statically indeterminate systems

Lecture 25 (TH)

4/24/12

737-744

Homework solution and Castigliano’s theorem

Lecture 26 (T)

4/26/12

Review

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