Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Additional 1. A polycrystalline Al thin film that is 1m thick is deposited onto a
perfectly flat (001) Si substrate that is 500 m thick at 300C. The Al thin film
has a (111) fiber texture and is stress free in the asdeposited state. We want to
evaluate t
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Homework #4
Due on 11/26 (Thursday) Class
Student Number :
.
Name :
.
Signature :
.
(By sign here, I declare that I didnt copy this homework and did it on my own!)
Problem
1
2
Score Assigned
50
50
Total
100
Score Earned
You may use Korean language in answ
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Prof. JunBo Yoon
EE566
Homework #1
Due on 09/17 (Thursday) Class
Student Number :
.
Name :
.
Signature :
.
(By sign here, I declare that I didnt copy this homework and did it on my own!)
Problem
1
2
3
Score Assigned
30
30
40
Total
100
Score Earned
You ma
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Solutions for Homework #4
1. 6.7
Solution
The (a) portion of the problem asks that we compute the energy for defect formation.
To begin, let us combine a modified form of Equation 5.2 and Equation 5.4 as
Q
N s = N exp  s
2kT
NAr
=
AM + AO
Q
ex
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Solutions for Homework #5
1. 7.9
2. 7.12
3. 7.14
4. 7.30
Solution
In order to compute the diffusion time at 650C to produce a carbon concentration of
0.90 wt% at a position 1.0 mm below the surface we must employ Equation 5.6b with position
(x) constant;
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Prof. JunBo Yoon
EE566
Homework #3
Due on 10/13 (Tuesday) Class
Student Number :
.
Name :
.
Signature :
.
(By sign here, I declare that I didnt copy this homework and did it on my own!)
Problem
1
2
3
4
Score Assigned
20
30
30
20
Total
100
Score Earned
Yo
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
EEW 560: Problem Set #1
Due date: March 25, 2015 at the beginning of the class.
Problem 1
Draw the Mohrs circle and find the principal stress and the orientation of the principle stress
axes for the following cases of plane stress:
(a)
x =8,000 MPa
y = 0
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Prof. JunBo Yoon
EE566
Homework #2
Due on 09/24 (Thursday) Class
Student Number :
.
Name :
.
Signature :
.
(By sign here, I declare that I didnt copy this homework and did it on my own!)
Problem
1
2
3
4
Score Assigned
25
25
25
25
Total
100
Score Earned
Y
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Problem Set 2 Solutions
Problem 1
Both RH/SF circuits indicated below will results in E character dislocation.
Problem 2
a) CD: LHS
DE: E (extra half plane in y direction)
EF: RHS
FG: E (extra half plane in z direction)
b) DE will move in x direction,
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
EEW 560: Problem Set #2
Due: April 17, 2015 at the beginning of the class.
Problem 1
An array of dislocations is shown at the interface between CdTe and GaAs thin films in
the high resolution micrograph below. The white dots represent columns of atoms in
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
EEW 560: Problem Set #3
Due: June 03, 2015 at the beginning of the class.
Problem 1
In class, we derived equations for the curvature of the multilayered structure as shown
below. We now want to evaluate the elastic strains in each layer when the structure
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
EEW 560: Problem Set #1
TA Contact information: ktg987@kaist.ac.kr (If you have questions, please send me an email.)
Problem 1
Draw the Mohrs circle and find the principal stress and the orientation of the principle stress
axes for the following cases of
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Prof. JunBo Yoon
EE566
Homework #3
Due on 10/13 (Tuesday) Class
Student Number :
.
Name :
.
Signature :
.
(By sign here, I declare that I didnt copy this homework and did it on my own!)
Problem
1
2
3
4
Score Assigned
20
30
30
20
Total
100
Score Earned
Yo
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
EEW 560: Problem Set #4 (optional)
Problem 1
A polycrystalline Al thin film that is 1m thick is deposited onto a perfectly flat (001) Si
substrate that is 500 m thick at 300C. The Al thin film has a (111) fiber texture and is
stress free in the asdeposit
Korea Advanced Institute of Science and Technology
Thermodynamics
MECHANICAL MAE211

Fall 2016
Homework #3 Solution
1.
In class, we derived equations for the curvature of the multilayered structure as
shown below. We now want to evaluate the elastic strains in each layer when the
structure is completely free at the edges (traction free edges). In t