SOLUTIONS
AE 316-01
Homework #6
Not Due
Test #2 on 10/31/2016
HALLOWEEN
8.2 Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation
of an elliptically shaped surface crack of length 0.5 mm (0
AB 302 Aerodynamics II Spring 2013
Homework 2 (due 1/29/13 in class)
Unless specied otherwise, assume the working uid is air and it can be treated as an ideal gas
with constant specic heats y=1.4. The specic gas constant for air is:
R = 287 J/(kg K) in SI
SOLUTIONS
AE 316-01
Homework #3
Not Due
Test #1 on 9/26/2016
5.1 Briefly explain the difference between self-diffusion and interdiffusion.
Answer
Self-diffusion is atomic migration in pure metals-i.e., when all atoms exchanging positions are of the same
t
AE 302
Aerodynamics II
Spring 2013
Homework 3 (due 2/5/13 in class)
Unless specified otherwise, assume the working fluid is air and it can be treated as an
ideal gas with constant specific heats =1.4. The specific gas constant for air is:
R = 287 J/(kgK)
AE 316-01
Homework #4
Due 10/12/2016
6.7 For a brass alloy, the stress at which plastic deformation begins is 345 MPa (50,000 psi), and the modulus of
elasticity is 103 GPa (15.0 106 psi).
(a) What is the maximum load that can be applied to a specimen wit
AE 302
Aerodynamics II
Spring 2013
Homework 1 (due 1/22 in class)
1. (a) Start with the isentropic relation
p = constant
where p is the pressure and is the specific volume. Combine this equation with the
definition = 1/ and the ideal gas equation of state
AE 316-01
Homework #1
Due 9/12/2016
2.18 The net potential energy between two adjacent ions, EN, may be represented by the sum of Equations 2.9 and
2.11; that is,
A
B
+
r
rn
Calculate the bonding energy E0 in terms of the parameters A, B, and n using the
AE 302 Aerodynamics II Fall 2012
Homework 4 (due 9/27/12 in class)
Unless specied otherwise, assume the working uid is air and it can be treated as an
ideal gas with constant specic heats 7:1.4. The specic gas constant for air is:
R = 287 J/(kg - K) in SI
AE 316-01
Homework #5
Due 10/19/2016
7.1 To provide some perspective on the dimensions of atomic defects, consider a metal specimen with a dislocation
density of 105 mm2. Suppose that all the dislocations in 1000 mm3 (1 cm3) were somehow removed and linke
AE 316-01
Homework #2
Due 9/19/2016
3.34 Within a cubic unit cell, sketch the following directions:
(a) [101]
(e) [111]
(b) [211]
(f)
[212]
(c)
[102]
(g) [312]
(d)
[313]
(h) [301]
FOR CLARITY, DRAW FOUR UNIT CELLS WITH 2 DIRECTIONS PER CELL AND LABEL THEM