Lecture Notes on
Arrays
15-122: Principles of Imperative Computation
Frank Pfenning, Andre Platzer, Jamie Morgenstern
Lecture 4
January 24, 2012
1
Introduction
So far we have seen how to process primitive data like integers in imperative programs. That is
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 11
Due date: 12/07/2016 (Wednesday)
1. The following expression has been found useful in describing the results of
uniaxial tensile tests at various strain rates and temperature
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 9
Due date: 11/16/2016 (Wednesday)
1. A viscoelastic material of length L is held between two walls. The elastic part has
modulus E and coefficient of thermal expansion ! "# , a
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 10
Due date: 11/22/2016 (Tuesday)
1. The critical crack-tip opening displacement of a particular crack configuration was
found to be 0.2 mm. The material has y= 450 MPa, E=70 GP
Question 3
a) Should use Rockwell B. It is used for medium grade/ annealed steels (see
textbook).
b) Spots C and E are on the deformed region, which means it has been work
hardened. The should not be used in the evaluation because the undeformed steel
is
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 7
Due date: 10/19/2016 (Wednesday)
1. A single crystal cylinder is oriented such that the cylinder axis is [2 1 1]. Slip first
occurs on the (1 1 1) plane in the [1 1 0] direc
=104 s1 and T =298 K , T =0 ,
1. a) For
) ( 1T m )=(1098+1092 0.93 )(1+ 0.014 ln 0.0001)
=( A + B n ) ( 1+Cln
d
=1092 ( 1+ 0.014 ln 0.0001 ) 0.93 0.07
d
at =0.002 , =981.4 MPa
d
= , we can find out that =0.084 and =1052 MPa
equate
d
=104 s1 and T =2
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 3
Due date: 09/21/2016 (Wednesday)
1. You are designing an undersea natural gas pipeline (long cylindrical pipe). The
gas is at pressure P0 and the pressure from the sea acting
Question 5
a).
Let the direction of sense vector be from L to A.
AB: Right hand screw
BC: Negative edge, half plane in negative z direction
CD: Left hand screw
DE: Negative edge, half plane in negative y direction
EF: Right hand screw
FG: Negative edge, h
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 5
Due date: 10/05/2016 (Wednesday)
1. You are given a material and told that it is elastically isotropic and exhibits a yield
strength of 950 MPa. The material is being used in
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 2
Due date: 09/14/2016 (Wednesday)
1. A mass of 2 kg is supported by a copper wire of length 4 m and diameter 4 mm.
Determine:
a. The stress in the wire.
b. The elongation of th
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 4
Due date: 09/28/2016 (Wednesday)
1. Solid polymer pressure-sensitive adhesives (PSA) are used to attach electronic
component to heat sinks to minimize interfacial thermal resi
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 1
Due date: 09/07/2016 (Wednesday)
1. Draw the 7 different crystal systems. Explain the differences between cubic,
orthorhombic, and monoclinic crystals.
2. Pt has a FCC structu
Question 1
=
280 = 0.05
350 = 0.15
Solving the above equations, n = 0.203 and K = 514.4 MPa.
Question 2
Dislocations in BCC have difficulty separating into partials due to high stacking fault energy, therefore
the dislocation interactions caused by work
MSE/MEAM 405/505: Mechanical Behavior of Macro/Nanoscale Materials
Assignment 8
Due date: 11/09/2016 (Wednesday)
1. You are performing a tensile test on a metal specimen. The strain in the
specimen is 0.05 at a stress of 280 MPa. When the true stress beco
SPRING 2017 MSE 221 QUANTUM PHYSICS OF MATERIALS
GENERAL INFORMATION
Pre-requisite: PHYS 150, PHYS 151 (concurrent), MATH 240 (concurrent)
I.
CONTACT INFORMATION
Dr. Mahadevan Khantha
Senior Lecturer, MSE
khantha@seas.upenn.edu
221 LRSM
215-898-2913
II.
T
MSE 221 Quantum Physics of Materials
Elementary quantum concepts, wave mechanics, energy states, bonding, transitions,
electronic properties
Prerequisite: PHYS 151
14 weeks, lectures (3 times a week), recitation (once a week)
Introduction
Old Quantum Theo
FALL 2010 MSE 221
Closed Book MID TERM II (1112210) 50 minutes
1. State if the following are true or false. (5 points)
(a) The velocity of an electron is the same as the phase velocity of the wave describing it.
(b) The velocity of a photon is the same as
Answers to Problem set #1
1. (18)
Each polymer name (1 pt) and the chemical structures (2pts), 2x3x3=18
Please refer chemical structures in the class notes or textbook
Auto parts store
Auto body parts can be made out of polymer like ABS plastic.
The tread
MSE 515 - Assignment 4 - Solutions
1.
In order to find the Green's function for the differential equation
d2y
+ 4y = (x 1)exp(x 2 ) .
2
dx
we first solve the equation
d 2G(x)
+ 4G(x) = (x)
dx 2
Using the Fourier transform
k 2g(k) + 4g(k) =
1
1
1
, where g