INSTRUCTION
PROFESSOR K. KOMVOPOULOS
Mechanical Behavior of Engineering Materials (ME108)
(undergraduate
course, junior/senior level)
Content
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Introduction
Microstructure and Deformation of
Materials
Alloying and Hardening
Heat Treatment
Slip Planes, Dislocations, Twinning
Introduction to Mechanical Testing
Stress and Strain
Complex Stress/Strain States
Special topics on Complex Stress States
Yielding and Fracture Criteria
Plastic Deformation
Ductile and Brittle Fracture
Fracture Mechanics
Fatigue, Stress-based Approach
Fatigue, Strain-based Approach
Cumulative Fatigue Damage
Notch Effects in Fatigue
Crack Growth
Time-dependent Deformation, Creep
Friction and Wear of Materials
Micromechanics
Labs
(1) Heat treatment, Phase
diagrams, Metallography, Hardness
(2)
Deformation due to Monotonic Loading
(3)
Time- and Rate-dependent Deformation
(4)
Deformation due to Cyclic Loading
(5)
Fracture toughness
(6)
Fatigue
(7)
Wear
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Mechanical Behavior of Engineering Materials (ME224)
(graduate
course)
Content
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Introduction
Stress/Strain,
Deformation
Theoretical
Strength of Solids
Elastic
Behavior (linear, rubber-like, viscous, iso-/anisotropic)
Inelastic
Behavior
Principal
Stresses/Stress Invariants
Spherical and
Deviatoric Components of Stress Tensor
Stress Space
Linear-Elastic
Stress-Strain Relationships
Mechanistic
Models
Yield
Criteria, Yield Surface
Incremental
Plasticity (Flow Rule and Strain Hardening Rule)
Isotropic
Hardening
Fatigue
(Stress Concentration, Notch Sensitivity, Endurance Limit)
Failure Criteria
High-/Low-Cycle
Fatigue
Strain-Life
Approach
Stress-Life
Approach
Notches,
Neuber’s Rule
Cumulative
Fatigue Damage
Crack
Initiation
Crack
Propagation
Fatigue, Life
Predictions
Fracture
(mechanisms, modes, and toughness)
High-Temperature
Deformation, Mechanisms
Creep
Resistance, Creep Deformation Maps
Dislocations,
Types and Properties
Moving
Dislocations and Interactions
Strengthening
Mechanisms
Contact
Fatigue
Wear,
Delamination
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Fracture of Engineering Materials (ME
225)
(advanced
graduate course)
Content
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Introduction
Review
of Elastic-Plastic Behavior of Materials
Macroscopic
vs. Microscopic Deformation
Part I . LINEAR ELASTIC FRACTURE MECHANICS (LEFM)
Overview
Stress
Concentration Factors
Asymptotic
Crack Tip Fields
Stress
Intensity Factor Calibration
Crack
Propagation Criteria
Limitations
of Applicability of LEFM
Energy
Relations in Elastic Crack Analysis
Overview
Energy
Relations in “Equivalent” Hyperelastic Materials
Asymptotic
Analysis: HRR Fields
Limits
of Applicability of Single-parameter Crack-tip characterizations:
•
Large-scale Yielding and Strain Hardening
•
J-integral and Crack-Tip-Opening Displacement (CTOD)
•
J-calibration Methods
Limits
of Applicability of Single-parameter Crack-tip Displacements:
•
Stable Cracking and the R-curve
Stability
Analysis (tearing)
Dislocations
Microstructural
Considerations
Strengthening
and Toughening Mechanisms
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Tribology (ME
226)
(advanced
graduate course)
Content
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Introduction
Surface interactions at various
scales
Historical development of the study
of nanomechanical surface interactions
Early friction and wear theories
Basic aspects of tribology problems
Surfaces
Nano-/macro-topography
AFM and STM surface imaging
Surface roughness parameters
Topography characterization
(deterministic vs stochastic methods)
Real contact area (scale effects)
Material
Properties
Bulk and surface material
properties
Chemical reactivity
Surface energy
Work of adhesion
Material compatibility
Contact Surface
Interactions
Origins of friction
Analysis of various friction
nano-/micro-mechanisms
Friction force measurements at
different scales
Concept of friction space
Friction mechanisms and adhesion in
NEMS/MEMS and hard-disk drives
Nanoscale friction mechanisms
Implications of friction in nanotechnology
and biotechnology
Lubrication
Lubrication regimes
Effect of load, speed, and
roughness on lubrication efficiency
Solid film lubrication
Boundary lubrication and modeling
Self-assembled monolayers
Solid-like behavior on confined
monolayers
Frictional heating and lubricant
effect
Chemical reactivity and
additive functionality
Extreme-pressure lubricants and
viscosity improvers
Antiwear additives
Ultrathin solid and liquid films at
various temperatures
Rheological behavior of lubricant
monolayers
Elastohydrodynamic lubrication
Wear
Types and uses of wear
Measurement of wear
Adhesion and asperity removal
during sliding
Size and shape of adhesive wear
particles
Abrasion, polishing; and grinding
Surface fatigue
Impact contact
Corrosion
Erosion
Fretting
Stick-slip
Nano-/micro-scale wear processes
Wear coefficient tables
Material
Response to Surface Tractions
Introduction to contact mechanics
Hertz analysis
Contact analysis of layered media
Scale effects on contact
deformation
Response of elastic-plastic solids
to sliding/rolling contact loading
Plastic flow of the near-surface
layer; shakedown, cyclic plasticity, and ratcheting
Void and crack nucleation
Crack propagation under mixed-mode
loading
Delamination wear
Microstructure effects on
delamination wear
Ultrathin-film mechanical
property characterization methods
Nanoindentation and nanowear
measurement and molecular dynamics modeling
Friction and
Wear of Polymers and Polymeric Composites
Phenomenological observations
Basic friction mechanisms of polymers
Wear model for fiber-reinforced
polymeric composites
Friction and wear of biopolymers
Molecular analysis of stretched
polymers
Basic surface physical chemistry of
polymers
Chemical Wear
Brief introduction to metal cutting
Cutting tool materials
Abrasion; solution and diffusion
wear
Tool wear monitoring techniques
Hard and soft protective overcoats
Methods for
Improving Tribological Properties
Surface texturing at various scales
Modulated/patterned surfaces
Soft and hard overcoats
Ion implantation
Chemical and physical chemical vapor
deposition
RF sputtering
Plasma spraying
Cathodic vacuum arc deposition
Laser surface alloying and cladding
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