MSE/MEAM 405/505 FALL 2013
MECHANICAL BEHAVIOR OF
MACRO/NANOSCALE MATERIALS
U NIVERSITY OF P ENNSYLVANIA
PROBLEM SET #3 - DUE WEDNESDAY, SEPTEMBER 25 HAND IN AT
BEGINNING OF CLASS
NOTES: Please write clearly, show all of your steps, and com
MSE/MEAM 405/505 FALL 2012
MECHANICAL BEHAVIOR OF
MACRO/NANOSCALE MATERIALS
U NIVERSITY OF P ENNSYLVANIA
FINAL EXAM
PART I: CLOSED-
BOOK
Total time for exam = 120 min
There are 2 parts to this midterm. Part I = closed-
book
MSE/MEAM 405/505 FALL 2013
MECHANICAL BEHAVIOR OF
MACRO/NANOSCALE MATERIALS
U NIVERSITY OF P ENNSYLVANIA
PROBLEM SET #1 - DUE WEDNESDAY, SEPTEMBER 18 HAND IN AT
BEGINNING OF CLASS
NOTES: Please write clearly, show all of your steps, and com
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
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 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
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 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
=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
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
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 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
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 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 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
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 FALL 2012
MECHANICAL BEHAVIOR OF
MACRO/NANOSCALE MATERIALS
U NIVERSITY OF P ENNSYLVANIA
MIDTERM
PART I: CLOSED-
BOOK
Total time for exam = 90 min
There are 2 parts to this midterm. Part I = closed-
book an