PH.D. in MECHANICAL ENGINEERING
The Ph.D. program in Mechanical Engineering consists of 33 credits of graduate level course work plus 9
credits of Doctoral Dissertation. The Ph.D. program is designed to allow for considerable flexibility in
course selecti
MEEG 342 Heat Transfer
Spring 2017
Homework 2 Solution
Was due Feb 24th, 2017
1. A composite wall is made up of a very thin cobalt layer, a 200-mm-thick germanium layer and
a 10-mm pure nickel coating layer, from left to right as shown. The cobalt layer i
Name
MEEG 304-175
Exam 1
Part 1: Computation Questions
1. In order to apply the distortion energy theory to compute the factor of safety for the static loading shown, what
value of stress should be used? (15 pts) Name
2. A machined steel has the following
Problem 4.
- Collapse of Tacoma Narrows Bridge in 1940.
The calamity can be presented as an example of elementary forced resonance, with the wind
providing an external periodic frequency that matched the bridge's natural structural frequency.
Reso
Problem 1
From hand calculation maximum von-Mises effective stress was 15.65 ksi. From SW simulation we got
18.032 ksi.
% deviation =
18.03215.65
15.65
% = 15.22%
Problem 2
Maximum displacement is 7.708 mm
Problem 3
Now we have 23.445 ksi maximum von-Mise
MEEG 342 Heat Transfer
Spring 2017
Homework 4 Solution
Was due March 10th, 2017
1. Heat is uniformly generated at a rate of 2 105 /3 in a plane wall of thermal conductivity 25 /
and thickness 60 . The wall is exposed to convection on both sides, with diff
MEEG 342 Heat Transfer
Spring 2017
Homework 1 Solution
Was due Feb 17th, 2017
1. The steady-state temperature distribution in a semi-transparent material of constant thermal
conductivity k and thickness L exposed to laser irradiation is of the form
() =
MEEG 342 Heat Transfer
Spring 2017
Homework 3 Solution
Was due March 3rd, 2017
1. Consider one-dimensional conduction in a plane composite wall. The outer surfaces are exposed to a uid
at 25C and a convection heat transfer coefcient of 1000 W/m2K. The mid
MEEG 342 Heat Transfer
Spring 2017
Homework 5 Solution
Was due March 24th, 2017
1. A 2-D conduction medium is discretized, and a portion of the domain near a boundary is shown below.
There is heat generation at a volumetric rate of 1 kW/m3 in the conducti
MEEG 341
Homework #9
Due Tuesday, November 29, 2016
Refrigeration/Heat Pumps
1. 30 points Data for steady-state operation of a vapor-compression
refrigeration cycle with Refrigerant 134a as the working fluid are given in
the table below. The r
A second order approximation of a satellite control system is shown in figure 1
A. Determine the closed loop transfer function of the system
B. Select the gain K so that the percent overshoot of the system in response to a unit step reference
input (R(s)=
MEEG 311
FINAL EXAM - IFORMATION
Exam Time/Place:
Time: Thursday, December 15, 10:30am-12:30pm
Room: Regular classroom
Extra Office Hours:
Time: Wednesday, December 14, 10:00am-12:00pm
Room: SPL208
Topics:
The exam is cumulative, that is, a
Equation Sheet for MEEG331 Midterm 2
Ideal gas law
=
Density
Specific gravity
is pressure (Pa), is volume (m3), is the number of
moles, is the universal gas constant (8.314 J/mol-K),
and is the temperature (K).
Units are kg/m3, or g/mL
Mass/Volume
Dens
Discussion #7
1. Find the and components of force required to hold
the bend shown alongside in place. Pressures 1 and 2
are gage pressures. Note that gravity acts perpendicular
to the paper.
2. The propeller-driven swamp boat shown in the figure
travels a
Discussion #7
1. The figure alongside shows a tube for siphoning water
from an aquarium. Determine the rate at which water
leaves the aquarium for the conditions shown. What is
the advantage of having that larger diameter section at
the end of the tube in
Discussion #6
1. The device shown alongside has a water inlet
velocity 1 = 100 m/s and pumps water from
a well at 0.1 m3/s. Determine the downstream
velocity 2 . Assume constant water density.
2. A centrifugal pump has a power input of 75 kW and a flow ra
Quiz 1
Please provide a short paragraph response to the following prompts. Your responses should be clear,
concise, and without grammatical error. You can pull from material discussed in class, personal
experiences youve had, or the course textbook (Proje
MEEG331- Fluid Mechanics 1
HW#5 Solution
1. Classify the following flows as laminar or turbulent:
(a) Sap traveling up the tissue of a tree -Laminar
(b) Mixing a beverage in a blender at the highest speed setting -Turbulent
(c) Pouring maple syrup out of
HOMEWORK #4
Problem 4.1
Solution:
The stored energy per unit volume in a
material under stress is
. If the
spring yields it deforms permanently and
ceases to fulfill its function, so the maximum
value of must not exceed y, when the stored
energy is
per un
HOMEWORK #8
Problem 8.1
Solution:
Lets consider the equation below for estimating diffusion rates:
) 1012 2 /
= exp (
We are first asked to use the CES elements database and make a bar chart of and discuss the
assumption that diffusion rates are constant
HOMEWORK #6
Problem 6.1
Solution
There are a number of different sports implements that employ composite materials.
However, a list of this type of sporting equipment would include skis and ski poles, fishing rods, vaulting
poles, golf clubs, hockey stick
PROBLEM 2.30
+B
PROBLEM 2.60
PROBLEM 2.67
Problem 2.92
a) A/C systems heat is transported out of the interior into the environment. This cooling process happens through
a process called refrigeration cycle. Due to Clausius statement of second law of therm
HOMEWORK #10
Problem 10.1
The diagram show a proposed design for an outdoor water tank. What aspects of the design might cause
concern for corrosion?
Solution:
Problem 10.2
Solution:
Problem 10.3
MEEG 321: Materials Engineering, Fall 2016
1
HOMEWORK #10
P
HOMEWORK #9
Problem 9.1
Solution:
Problem 9.2
Solution:
Solution:
Stress-Strain curve of two different polymers are given as below.
(b)
(a)
Solution:
(a) the mechanical characteristics of polymers are much more sensitive to temperature changes near
room t
HOMEWORK #5
Problem 5.1
Solution:
Cut the cylinder in half and use free body diagram
4
We have,
K=1.1(C)
80*106=1.1*(*0.002),
So,=9.175*108 Pa >P*R/t=2.379*108Pa.
Thus its safe to use the cylinder. Because the stress it can take is higher than the applied
HOMEWORK #1
Problem 3.1
Solution: A tank or pipe carrying a fluid or gas under a pressure is subjected to tensile forces, which
resist bursting, developed across longitudinal and transverse sections. But the fail is most likely to occur
through longitudin
HOMEWORK #2
Problem 2.1
Solution:
a) The modulus of elasticity is the slope of the elastic or initial linear portion of the stressstrain curve.
The strain axis has been expanded in the inset to facilitate this computation. The slope of this linear
region
HOMEWORK #1
Problem 1.1
Solution: First we consider different materials for different parts of the chair. Major parts of the desk
chair are:
1.
2.
3.
4.
Seat and Back support
Legs
Spring and bearings
Rollers
When selecting material for those parts, we sho