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EML 6232 INTRODUCTION TO COMPOSITE
MATERIALS EML4230 FALL 2008 ROOM ENG003 (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.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.
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, Friday 1-2PM GRADING:
Your final letter grade will be based on the following: Test dates Monday Sept 8 Friday October 3 November 3 December 5 25% each test Extra credit opportunities will be given
throughout the semester. 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 EML4032. 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 (2008-2009). 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
(2008-2009). 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 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 catalog of 2008-2009. |