SPRING 2003


ADVANCED COMPOSITE MATERIALS
Course: ESM 696 Sec. 15
Instructor: A. Tobin
Dept. of Materials Science and Eng

This course is intended for graduate and advanced
undergraduate students who would like to gain
quantitative insights into the thermal, physical,
mechanical and chemical properties of advanced
composite materials currently being utilized by
industrial and aerospace industries.  The course
will emphasize the fundamental relationships between
the properties of composite materials and their
constituent properties as well as giving students
an appreciation of the relationships between
materials and processes and composite properties.
Emphasis will be placed on the importance of the
design of the interface on composite properties
as well as the special considerations needed in
design application of composite materials to
industrial and aerospace systems.


Introduction
Definition of composite material
Types of composites
Advantages and disadvantages composite materials
Characteristics of composite
Applications of composites to industry/aerospace

Micromechanics of Composites
Physical properties
Thermal properties
Elastic properties
Monotonic tensile/compressive strength


Fracture Mechanisms and Toughening in Composites
Mechanics of load transfer
Determination of preferred mode of failure
Critical debonding for crack deflection
Stress criterion for crack deflection
Energy release rate criterion for crack deflection
Strain criteria for matrix cracking
Fiber pullout criteria
Crack bridging
Interface engineering for enhanced toughness




The Matrix in Composites
Properties and preparation:
    -polymer matrices
    -metal matrices
    -ceramic matrices


The Fiber in Composites
Preparation and properties of organic fibers
Preparation and properties of ceramic fibers
Preparation and properties of carbon-based fibers
Fiber Coatings for interface control
Statistics of fiber strengths


The Interface in Composites
Types of Interface bonding
Interactions between fiber and matrix
Optimization of interface bonding
Measurement methods of interface strength
Interface roughness
Interface mechanics and toughness


Processing of Composites
Polymer matrix
Metal matrix
Ceramic matrix


Thermal Stresses in Composites
Importance of thermal stresses on properties
Calculation of thermal stresses
Measurements of thermal stresses


Environmental Effects in Composites
Effects of moisture on matrix in polymer composites
Effects of gaseous exposure on fiber properties
Effects of air exposures on composite properties


Creep in Composites

Effect of high temperature and stress
Creep curve for composites
Stress relaxation effects in matrix and fiber
Comparison to monolithic materials


Fatigue of Composites

Nature of fatigue process
S-N curves
Fatigue crack propagation
Damage mechanics in fatigue
Thermal Fatigue


Designing With Composites
General philosophy
Advantages of composites in structural design
Design procedures
Hybrid composites 

back to Stony Brook's Materials Science and Engineering department.

01/24/03 JQ.