ENMA 300/ENME 382
Homework 1
Due: Wednesday, Sept. 9, 2015
1. Predict the type of bonding that holds the atoms/molecules together in the following solid
materials. Explain why you have made the prediction for each material. Where appropriate
include calcu

University of Maryland Honor Pledge:
I pledge on my honor that I have not given or received any unauthorized assistance on this exam.
My name and signature on page 1 attest that I have read and agree with the above statement.
Printed Name:
ENME 382/ENMA 3

Maria Cristina Carralero
ENMA 300/ENME 382
Homework 1
Chapter 1: Callister 1.1
Sports Equipment: Soccer Ball
Soccer balls are made by incorporating three main parts into one piece of equipment. The
three parts of the ball are the covering, the middle lini

ENME382, HW 4
Mini-Lab 3
1.
2.
3.
4.
Epsom Salt Crystals
In the beaker, stir 1/2 cup of Epsom salts with 1/2 cup of very hot tap water for at least
one minute. This creates a saturated solution, meaning no more salt can dissolve in the water.
(Some undiss

HMWK Problems
Additional Problem
MINI LAB
a. When we stack two pages on top of each other and put the half piece of paper in between
the two we observe an edge dislocation. There is a half plane between two full planes and
the half plane terminates within

Homework #3
Maria Carralero
3.5 Show that the atomic packing factor for BCC (Body centered cubic) is 0.68.
(2)
( 43 ) r =
3
3
4 3r
( )
3
0.68 The r^3s cancel
3.8 Strontium (Sr) has an FCC (Face centered cubic) crystal structure, an atomic radius of
0.215

ENME382 HW 2
2.6
a. Two important quantum-mechanical concepts associated with the Bohr model of the atom are
that electron energy is quantified into shells and electrons are particles that move in specific
orbitals.
b. Two important additional refinements

Prof. Sarah Bergbreiter
2nd order response to simple periodic input
Magnitude
Phase
Response to sinusoid
Prof. Sarah Bergbreiter
Magnitude ratio
Prof. Sarah Bergbreiter
Phase
Prof. Sarah Bergbreiter
What does this mean?
Prof. Sarah Bergbreiter
Prof. S

Prof. Sarah Bergbreiter
First Order Sensor Dynamics
Prof. Sarah Bergbreiter
Prof. Sarah Bergbreiter
First order sensor responses
Bode plot review
Examples
What happens to input vs. output in time?
Reading a Bode plot
Dynamic error
Prof. Sarah Bergbr

English 393 Online
Topic Approval Memo
Problem
Problem you plan to address, or situation you will explore and improve.
o Improper use of ladders results in a significant amount of avoidable
workplace deaths and injuries each year.
What are the potential

Prof. Sarah Bergbreiter
xkcd
Fourier Transforms
Prof. Sarah Bergbreiter
Prof. Sarah Bergbreiter
Prof. Sarah Bergbreiter
Basic Definition
Two-sided DFT
Frequency resolution
A practical guide to the Fast Fourier Transform
Matlab examples
Fourier Trans

Prof. Sarah Bergbreiter
Tom Boil
Fourier Series
Prof. Sarah Bergbreiter
Prof. Sarah Bergbreiter
Basic Definition
Even and odd function examples
Time to Frequency Examples
Matlab script
Finding coefficients for a triangle wave
Fourier Series Definiti

LAB 10: PROJECT LAB
Objectives
In this lab you will use your Arduino in a project of your choosing, applying your sensing, interface
circuit, actuating, and programming skills to do something interesting. Be creative, have fun!
LAB INSTRUCTIONS DONE ON YO

Prof. Sarah Bergbreiter
Sensors Intro
Prof. Sarah Bergbreiter
Prof. Sarah Bergbreiter
Pulling sensor metrics from datasheets
Pulling sensor metrics from data
Sensor metric clarifications
Basic sensor interfaces
Sensors as systems
Freescale Semiconductor
D

LAB 8: STRAIN SENSING
OBJECTIVES
The purpose of this laboratory is to get hands-on experience with a second order system, a
cantilever beam, as well as experience with resistive strain sensing using a) strain gauges, b) a
differential op-amp circuit, and

2-1
Chapter Two:
Atomic Structure
Adopted from:Fundamentals of Materials Science and
Engineerinh, ed 5 integrated, Callister and Rethwisch
Electronic Structure
Electrons have wavelike properties, as well as particle behavior. The
energy of an electron ca

ENMA 300 / ENME 382
Introduction to Engineering Materials
Chapter 3. Crystal Structures
Prof. Yifei Mo
ENMA 300 / Yifei Mo
0
Homework
Homework 3 assigned.
Due on Friday Sept. 25, 5pm.
Submission:
Submit a hard copy to the box outside our TAs office
(0

ENMA 300 / ENME 382
Introduction to Engineering Materials
Chapter 3. Crystal Structures
Prof. Yifei Mo
ENMA 300 / Yifei Mo
0
Homework
Homework 2 assigned. Covers two lectures this week
(chap 2&3 of the book).
Due on Wednesday Sept. 16, 5pm.
Submission:

ENMA 300 / ENME 382
Introduction to Engineering Materials
Chapter 3. Crystal Structures
Prof. Yifei Mo
ENMA 300 / Yifei Mo
0
Chapter 3: Structure of Metals and Ceramics
Foundation chapter! - need it throughout the class and beyond
Common & Important Cry

ENMA 300 / ENME 382
Introduction to Engineering Materials
Chapter 3. Crystal Structures
Prof. Yifei Mo
ENMA 300 / Yifei Mo
0
Homework
Homework 2 assigned. Covers two lectures this week
(chap 2&3 of the book).
Due on Wednesday Sept. 16, 5pm.
Late submis

ENMA 300 / ENME 382
Introduction to Engineering Materials
Atomic Structure and Interatomic Bonding
Prof. Yifei Mo
ENMA 300 / Yifei Mo
0
Important course announcements
Textbook:
For ME students in ENME 382: The reduced
version can be found under ENMA300

ENMA 300 / ENME 382
Introduction to Engineering Materials
Chapter 3. Crystal Structures
Prof. Yifei Mo
ENMA 300 / Yifei Mo
0
Homework
Homework 1 assigned. Covers the first two lectures
(Chap1&2 of the book).
Due on Wednesday Sept. 9, 5pm. (Will mostly b

ENMA 300/ENME 382
Homework 2 Solutions
Spring 2015
1. The bond-energy curves for two engineering materials are
shown on the curve to the right. Your task is to select the better
material for use in each application described below. Explain
your reasoning

Announcements
Midterm 1 on Thursday Oct. 8, 11:00-11:50 am. 50-minutes total.
Covers Chap1-Chap4. Lectures by last week (lecture 1-8).
Closed book.
Calculator allowed.
A letter size formula sheet allowed. Must be hand written. Turn in
your sheet (with you

ENMA 300/ENME 382
Homework 1
Due: Wednesday, Sept. 9, 2015
1. Predict the type of bonding that holds the atoms/molecules together in the following solid
materials. Explain why you have made the prediction for each material. Where appropriate
include calcu

ENMA 300/ENME 382
Homework 3 Solutions
Spring 2015
1. (Callister. 3.8) Calculate the radius of an iridium atom, given that Ir has an FCC crystal structure, a
density of 22.4 g/cm3, and an atomic weight of 192.2

Homework #4
Name _
ENMA 300/ENME 382
Due Wednesday, September 30, 2015
Answer Key_
1. Give the Miller indices of the planes (A,B) in the cubic unit cell. NOTE: All the planes
intersect the unit cell either at whole or half lattice parameters.
Plane A
x
y