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EML 6232 INTRODUCTION TO COMPOSITE
MATERIALS EML4230 FALL 2009 ROOM PHY 109 (MWF 2-2:50PM) 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.autarkaw.com/books/composite/index.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 learning; 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. Computational Methods, EML3041 or
equivalent. You should have a C- or
higher in both courses. CALCULATOR:
No programmable calculators are allowed in the classroom or tests. You can only use nonprogrammable
calculators for class work, homework, and tests. The only acceptable calculators are TI-30Xa and TI-30Xa Solar. No other
calculator is allowed. No exceptions
will be made. Office Depot, Staples,
and Wal-Mart stock these calculators.
Bring the calculator to every class. TEXTBOOK:
Mechanics of Composite Materials by Autar K. Kaw, CRC-LLC Press, FL, Second
Edition, 2005. OFFICE LOCATION: ENC 2215 E-MAIL
: kaw@eng.usf.edu OFFICE HOURS: Monday 3-4PM GRADING:
Your final letter grade will be based on the following: Test dates Wed Sept 9 Friday October 9 Friday November 13 Comprehensive Test Wed Dec 9
3-5PM (Chapters 2-5). 25% for each test Extra credit opportunities may be given throughout the semester. GAURENTEED 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 (2008-2009). Ten points will be added to every test if
you signed up for EML4230. 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/graduate students (2009-2010). COURSE SCHEDULE _______________________________________________________________ TOPIC LECTURE HOURS __________________________________________________________________ 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 (2009-2010). 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. In the event of an emergency, it
may be necessary for USF to suspend normal operations. During this time, USF may opt to continue
delivery of instruction through methods that include but are not limited to:
Blackboard, Elluminate, Skype, and email messaging and/or an alternate
schedule. It is the responsibility of
the student to monitor Blackboard site for each class for course specific
communication, and the main USF, College, and department websites, emails,
and MoBull messages for important general information. 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 est. 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/graduate catalog of
2009-2010. |