Torsion Statically Indeterminate (6-7)
# of independent equilibrium equations are
less than # unknowns
Must use distortion equations (involve the
angle of twist) must be written until total #
of equ
Auger Electron Spectroscopy
(AES)
1
Brief History
Auger Effect discovered in
1920s
Meitner published first
journal
Auger transitions
considered noise at first
1953-JJ Lander
Characterization of s
Methods and Tehniques in
Surface Science
Prof. Dumitru LUCA
Alexandru Ion Cuza University, Iasi, Romania
Outline
Auger Electron Spectroscopy (AES) short historic and physical
background,
How AES mea
Electron Spectroscopies
of InN grown by HPCVD
Rudra P. Bhatta
Solid State Physics (Physics - 8510)
Fall 2005
Department of Physics and Astronomy
Georgia State University
Atlanta, Georgia
Outline
Moti
Emre Erturul
20824006
Emin ahin
20824259
Sekin Gke
20824044
KMU 396
Material Science and Technology
Electron
Spectroscopy for
chemical analysis,
ESCA and Auger
Electron
Spectroscopy, AES,
Outline of L
2/9/2016
Stress Concepts
Stress intensity of force
Normal and shear stresses
We are interested in knowing stress in a given
planes/orientation so that we can determine if the
material can take it
1/26/2016
Stress
Transformation and
Principal Stresses:
Chapters 2.9-2.10
= 0 = + +
= 0 = +
AMC Spring 2016 (Chuang) - Stress Transformation
1
1
1/26/2016
x y
2
n
x y
2
x y
2
nt
= 2 +2
2/2/2016
Displacement, Deformation and Strain
Displacement of
Deformation of line
=
AMC Spring 2016 Lectures 4-5 - Strain and Strain Measure
1
1
2/2/2016
Normal Strain
= , deformation
Strain
2/11/2016
Stress-Strain Relationships and Hookes Law
Reading: Riley Chapter 4.1-4.4
Force vs deformation, e.g., the
tensile test
Strains typically measured using
strain gages or extensometers
e.g.,
University of Akron
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Corrosion Monitoring Systems and Sensors to Track
Material Durability in Concrete Structures
Rev 3
October 2013
LIST OF REVISIONS
Rev
No.
3
Date
Oct 2013
Revision Details
Author(s)
Issued by
Updated w
Statistical Analysis of
Zinc Coated Washers
Purpose of the Experiment
Determine how many centimeters
of zinc and layers of zinc atoms
are present on the surface of a
galvanized steel washer.
What is C
Shrink Fitting
Laminated, thick-walled cylinder formed
by shrinking outer cylinder over an inner
cylinder increases load carrying ability
of assembly by developing initial state of
compressive tangent
Torsional NonCircular Sections
(Ch. 6:11)
=
2
=
3
Corners have zero t
Maximum t at midpoint of a side
AMC Spring 2016 - Lecture 16 Torsion Non-Circ & Thin Wall Tube
1
1
= 25 ; = 28
6-120
a
75
a
4
Thin Walled Pressure Vessels
If wall is thin enough, normal
stress through-thickness is
nearly constant
If t < 0.1r, max normal s on inside
wall is < 5% greater than avg
AMC Spring 2016 - Lecture 9
2/18/2016
AMC Lectures 7 & 8: Materials and their
properties
Different classes
of materials
Why different?
How to design?
Materials Selection in Mechanical Design 4th Edition, M. Ashby (Elsevier, 2
Thick-walled Cylindrical Pressure vessels (Chapter 5-10)
Thick wall is defined by a shell with the ratio of wall thickness to
radius of curvature larger than 0.1. (t/r > 0.1 or r/t < 10)
2
2
(r+dr
Torsional Loading of Shafts (Ch. 6:1-4)
Tr dF dA
For circular shafts (solid
or hollow), plane section
before twisting remains
plane after twisting and
diameter remains
straight not true for
other shap
1/28/2016
AMC Lecture 3: Mohrs Circle Plane Stress
Reading: Riley Chapter 2.11
Last lecture we derived a number of equations: Plane stress, principal
stresses, max shear stres, etc
A graphical method