|
EML 6232 INTRODUCTION TO
COMPOSITE MATERIALS EML4230 FALL 2011 ROOM CHE217 (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. Available at the library for full semester loaner
check out to 25 students. OFFICE LOCATION: ENC 2215 E-MAIL : kaw@usf.edu OFFICE HOURS: Wed
4-5PM GRADING: Your final letter grade will be based on the
following: Test dates Wed Sept 7 – 20% Wed October 5 – 25% Wed November 16 – 25% Comprehensive Test Wed
Dec 7 3-5PM (Chapters 2-5) – 30% 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 (2011-2012). 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 (2011-2012). COURSE SCHEDULE _______________________________________________________________ TOPIC LECTURE HOURS __________________________________________________________________ CHAPTER 1 6 Introduction to
Composite Materials CHAPTER 2 12 Macromechanical Behavior of a Lamina CHAPTER 3 6 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 (2011-12). 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 “Students in need of academic accommodations
for a disability may consult with the office of Students with Disabilities
Services to arrange appropriate accommodations. Students
are required to give reasonable notice prior to requesting an accommodation.” 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 2011-12. |