Ali Jafry Teacher Pre Calculus & Pre AP Pre Calculus Carbon Nanotube-Epoxy Composites Dr. Dimitris...
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Transcript of Ali Jafry Teacher Pre Calculus & Pre AP Pre Calculus Carbon Nanotube-Epoxy Composites Dr. Dimitris...
Ali JafryTeacher
Pre Calculus & Pre AP Pre Calculus
Carbon Nanotube-Epoxy Carbon Nanotube-Epoxy CompositesComposites
Dr. Dimitris Lagoudas, Dr. Daniel Davis, Patrick Klein & Lesley Weitz
Faculty Advisors
Madison High School for Meteorology and Space Science (Magnet School)
Texas Institute of Intelligent Bio Nano Materials & Structures
for Aerospace Vehicles (TIIMS)
Aerospace Engineering at Texas A & M University
DAY 1 AND DAY 02 Composites Application of Composites Introduction to Nano
Composites Application of Nano
Composites and Nano technology
Pre test
Students will engage in: Cooperative learning
Peer tutoring
Whole group instruction
Hands on activities
Math and Science Integration
High-performance applications of carbon fiber composites
Boeing 787
F-22 Fighter
Nose section of Boeing 787
Multifunctional Composites
Multifunctional composites have good mechanical properties and at least one other property of interest (e.g. electrical, thermal…) in a given application.
How many carbon nanotubes does it take to stretch across the width
of a human hair?
A human hair is about 100 micrometers.
A carbon nanotube is about 5 nanometers
That’s 20,000 carbon nanotubes per human hair.
Nanoscale MaterialsHow Small is Nano Small?
Properties of Carbon NanotubesModulus (Stiffness)
5 x steel 400 x epoxy
Electrical conductivity 1000 x copper wire 10^15 x epoxy (Quadrillion times)
DAY 03, 04 & 05
Introduce engineering concepts -stress, strain, elasticity etc.
Three-point bending test to measure stiffness (modulus) of material.
Shear Force, Bending moment. Differential Equations.
Equations for Internal Shear force, Bending Moment, and Displacement
0
2
2
1
*
dVy p
dxdMz Vy
dx
du Mz
dx E I
Solving for Internal shear and moment equations
1
1 1 1 2
0 0
*
d dVy Vy Vy C
dx dxd dMz C Mz C Mz C x C
dx dx
To calculate modulus (E),
3
34
L PE
wt
L = support spanP = Loadδ = displacementw = specimen widtht = specimen thickness
Solving the Internal Shear and Moment Equations (with Distributed Load)
2
25 25 25* 1
2525 1 25* 1 * 1* 2
2
d dVy Vy Vy x C
dx dx
d dMz x C Mz x C Mz x C x C
dx dx
Other Differential Equations
Acceleration & velocityAcceleration & velocity
Other applications (Work, Momentum, Energy)Other applications (Work, Momentum, Energy)
TEKS / TAKS Correlation Make quantitative observations and measurements
with precision. (2B) Organize, analyze, evaluate, make inferences, and
predict trends from data. (2C) Graph data to observe and identify relationships
between variables(2D) Develop and interpret a free-body diagram for
force analysis (4E)
Conclusions
Introduce Nanocomposites and carbon nano tube epoxy composites.
Introducing Engineering concepts like bending of beam, Stress, Strain.
Experiments. Field trips.