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.

Multi-wall CNT (we use a mixture of single wall and mutli-wall CNTs)

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?

Carbon Nanotubes grown on carbon fiber.

Fiber

Properties of Carbon NanotubesModulus (Stiffness)

5 x steel 400 x epoxy

Electrical conductivity 1000 x copper wire 10^15 x epoxy (Quadrillion times)

Electrical Conductivity Specimens

Pure epoxy 0.015 wt. % CNT

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.

Three-point bending test

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

Shear force and Bending MomentQuestions

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.

ACKNOWLEDGEMENTSI would like to extend appreciation to the following

Dr. Dimitris Lagoudas, Dr. Daniel Davis,

Patrick Klein Lesley Weitz Jeff Cowley

E 3 team and staffTexas A & M Engineering

National Science Foundation