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EML 6232 FALL 2004 ROOM BSN 1309 (Thursday INTRODUCTION: "Do not
give them any more straw to make bricks with, as your custom has been; let
them go and find straw for themselves" (Exodus 5). Although man‑made composites have existed for
thousands of years, the high technology of advanced composites has been used
in the aerospace industry only for the last thirty years. The
applications are becoming diverse - from aircraft structures and missile
canisters to tennis racquets and fishing rods. The
objective of this course is to analyze and design structures made of fiber
reinforced composite materials. SHORT OBJECTIVES: Introduce to advanced composite materials and
their applications. Develop
fundamental relationships for predicting the mechanical and hygrothermal
response of multi layered materials and structures. Study micromechanical and macromechanical
relationships for lamina and laminated materials with emphasis on continuous
filament. Introduce material, structural,
and strength optimization to design laminated composite materials using user friendly software.
For more information, visit these sites http://www.eng.usf.edu/~kaw/class/composites and http://www.eng.usf.edu/~kaw/promal/book.html OBJECTIVES (letters in brackets at end of each objective
correspond to a-k program outcomes of Mechanical Engineering for ABET 2000 accreditation
given below): Introduction to Composite Materials (j) Define a
composite, enumerate advantages and drawbacks of composites over monolithic
materials, and discuss factors which influence mechanical properties of a
composite Classify
composites, introduce common types of fibers and matrices, and manufacturing,
mechanical properties and applications of composites Recycling of
composites Introduce
terminology used for studying mechanics of composites Macromechanics of a Lamina (a,e,
l, n) Review
definitions of stress, strain, elastic moduli and strain energy Develop
stress-strain relationships for different types of materials Develop
stress-strain relationships for a unidirectional/bidirectional lamina Find the
engineering constants of a unidirectional/bidirectional lamina in terms of
the stiffness and compliance parameters of the lamina Develop
stress-strain relationships, elastic moduli, strengths, thermal and moisture
expansion coefficients of an angle ply based on those of a unidirectional/bidirectional
lamina and the angle of the ply Micromechanical Analysis of a Lamina (a, e, l, n) Develop
concepts of volume and weight fraction of fiber and matrix, density and void
fraction in composites Find the nine
mechanical and four hygrothermal constants: four elastic moduli, five
strength parameters, two coefficients of thermal expansion and two
coefficients of moisture expansion of a unidirectional lamina from the
individual properties of the fiber and the matrix, fiber volume fraction, and
fiber packing Discuss the
experimental characterization of the above nine mechanical and four
hygrothermal constants Macromechanical Analysis of a Laminate (a, e, l, n) Understand
the code for laminate stacking sequence Develop relationships
of mechanical and hygrothermal loads applied to a laminate to strains and
stresses in each lamina Find the
elastic stiffnesses of laminate based on the elastic moduli of individual
laminas and the stacking sequence Find the
coefficients of thermal and moisture expansion of a laminate based on elastic
moduli, coefficients of thermal and moisture expansion of individual laminas,
and stacking sequence Failure, Analysis and Design of Laminates (a, c, e, g, k, l, n, o) Understand
the significance of stiffness, and hygrothermal and mechanical response of
special cases of laminates Establish the
failure criteria for laminates based on failure of individual lamina in a
laminate Design
laminated structures such as plates, drive shafts and thin pressure vessels
subjected to in-plane and hygrothermal loads Introduce
other mechanical design issues in laminated composites PROGRAM OUTCOMES FOR MECHANICAL ENGINEERING The measurable
outcomes expected of all graduates of the program are stated below: 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
educational necessary to understand the impact of engineering solutions in a
global/societal context; i. A recognition of the
need for and an ability to engage in life long leaming; j. A
knowledge of contemporary issues; and, k. An
ability; to use the techniques, skills, and modem engineering tools necessary
for engineering practice; 1.
A knowledge
of chemistry and physics with depth in both. m.
An ability to apply advanced mathematics through multivariate calculus and
differential equations. n. A familiarity
with statistics and linear algebra; o.
The ability to work professionally in both thermal and mechanical systems
areas including the design and realization of such systems. OUTCOMES: Students would have
fundamental knowledge in mechanical analysis and design of structures made of
composite materials PRE REQUISITES: Mechanics of
Materials, EML 3500 or equivalent. CALCULATOR: No programmable calculators are allowed in the classroom or tests. Calculators need to scientific with
trigonometric and other scientific functions.
Statistical functions are allowed in the
calculator. If you are unclear about
the calculator, buy one and show it to me before
opening the package. If the calculator
costs more than $15, you are buying the wrong calculator. TEXTBOOK: Mechanics of
Composite Materials by Autar K. Kaw, CRC-LLC Press, FL, First Edition, 1997. OFFICE LOCATION: ENC 2215 E-MAIL : kaw@eng.usf.edu OFFICE HOURS: 10-11:30 Tues, Thurs GRADING: Your final letter grade will be based on the
following: In-class tests in the
first 30 minutes of each class – 75% Final project (due in
Thursday of last week of classes) – 25% GRADING POLICY: Grade A+ is 95 100 (4.00) Grade A is 90-94 (4.00) Grade A- is 86-89 (3.67) Grade B+ is 83-85
(3.33) Grade B is 80-82 (3.00) Grade B- is 76-79 (2.67) Grade C+ is 73-75
(2.33) Grade C is 70-72 (2.00) Grade C– is 66-69 (1.67) Grade D+ is 63-65
(1.33) Grade D is 60-62 (1.00) Grade D is 56-59 (0.67) Grade F is 0-55
(0.00). Your final grade will
be rounded off as follows at the end of the course. The
integer part of your course after adding 0.999999 will be
recorded as your final grade.
For example, 84.000001 will be rounded off as 85, and 84.0000009 will
be rounded off as 84. Course grades will be evaluated on the above percentages and a letter
grade will be assigned to you as outlined in the University catalog for
undergraduate students (2004-2005). Course grades will be evaluated on percentage score and a letter grade
will be assigned to you as outlined in the University catalog for
undergraduate students (2004-2005). COURSE SCHEDULE _______________________________________________________________ TOPIC LECTURE
HOURS (Based on 1-hr lectures) __________________________________________________________________ CHAPTER 1 6 Introduction to
Composite Materials CHAPTER 2 9 Macromechanical
Behavior of a Lamina CHAPTER 3 9 Micromechanical
Behavior of a Lamina CHAPTER 4 6 Macromechanical
Behavior of a Laminate CHAPTER 5 8 Design and Failure of
a Laminate __________________________________________________________________ All the examinations
and tests stated above will be closed book and closed notes. A formula sheet made by the instructor may be allowed to be used in an examination. Course grades will be
evaluated on the above percentages and a letter grade will be assigned
to you as outlined in the University catalog for undergraduates and graduates
(2001-2002). MAKE UP TEST POLICY: In the event of a serious illness
(physician's statement documenting severity of illness required), death in
the family or other legitimate, documented, verifiable emergency resulting in
the absence from a schedule test, a student may be given
a make-up test. Notification of
absence must be given prior to the commencement of
the scheduled examination or test to me.
Do not presume that your reasons for missing an examination or test
are acceptable unless authorization is given to you. REGRADING POLICY Regrading of a test, homework,
or computer project should be requested within five
working days of it being returned to you.
Regrading after the final grade has been assigned for the course will be allowed only in
extreme circumstances. Mistakes in the
grade book entries should be rectified as soon as
possible to avoid any change of grade issues.
You will need a copy of all your graded tests for verification. KEEP ALL YOUR GRADED PAPERS TILL THE END OF
THE COURSE. GRADES ON THE WEB Grades will be updated on the web (https://my.usf.edu) after
grading of each quiz/test. MISSED EXAMINATIONS NO make up tests will be given.
However, in the event of a serious illness (physician's statement
documenting severity of illness required), death in the family or other
legitimate, documented, verifiable emergency resulting in the absence from a
schedule test, each case will be evaluated
separately. The decision of the
instructor is final. An example of a
make-up score is that if you miss a test, you may be given
the same grade as another exam, and so on.
Curving of make-up exam grades is at the discretion of the instructor.
Notification of
absence must be given before the commencement of the
scheduled examination or test to me.
You need to type a professional memo (no e-mails will be accepted) about
your absence addressed to me as soon as
possible. Attach any documentation
with it. Do not presume that
your reasons for missing an examination or test are acceptable unless
authorization is given to you. POLICY ON RELIGIOUS OBSERVATIONS Students who need to
be absent under this rule must provide written notice of date(s) to me by the second-class meeting. POLICY ON STUDENT DISABILITY ACCOMODATIONS Any student who feels
he/she may need an accommodation based on the impact of a disability should contact
the Office for Student Disability Services at 813-974-4309 in SVC 1133 to
coordinate reasonable accommodations for students with documented
disabilities. The website is http://www.sds.usf.edu/index.htm ACADEMIC DISHONESTY AND DISRUPTION If you are found
cheating on any of the homework, quizzes or tests,
you will get a ‘FF' for the whole course, and referred to the Dean's office
for further process or appeal. Academic disruption
includes excessive side talking and lack of respect for your fellow
classmates and the instructor, and will be handled
as per the undergraduate catalog of 2004-2005. |