ME 382  Fall 2017
Homework 1
(Due at the beginning of class on Friday, January 13 th, 2017)
Tensile test questions (Lecture 2)
1.
The relationship between the true stress and the true strain for a me
Homework 7 Solutions
1.
Solution:
Solution:
ME 382 Fall 2010 HW 7 Solutions
2.
Explain why a piece of chalk breaks in torsion with a helical fracture surface whereas a
similar piece of Plasticene (mod
ME 382 Winter 2016
ME 382
Homework 1 Fall 201
Homework 1
Due on Friday, January 15, 2016
(Due on Friday, September 1 th, 201 )
Question numbers are from third editions of the textbooks.
(available on
1150
ME 382 HOMEWORK 6 SOLUTION
4
890
700
0.25
2.75
1. (a) As shown in the diagram, 0.25%2.75%.
(b) As shown in the diagram, the alloy should be held between 700 Cand 890 C.
2
3.
4. (Ashby & Jones 1: 13.2) A large thick plate of steel is examined by Xray methods, and found
to contain no detectable cracks. The equipment can detect a single edgecrack of depth a
= 5 mm or gr
ME 382 HOMEWORK 2 SOLUTION
1.
xx = 3.0 103
yy = 1.5 103
xy = 2.0 103
The strain gauges are on the free surface of a steel structure,
E = 196 GPa = 1.96 105 MPa
= 0.3
E
196
G=
=
75.38GPa
2(1 + )
2 (1
ME 382 Fall 2012
Homework 1
(Due on Friday, September 14th, 2012)
Question numbers are from third editions of the textbooks.
(available on reserve in the Engineering Library and online)
Answers given
ME 382 HOMEWORK 2 SOLUTION
1.
xx = 3.0 103
yy = 1.5 103
xy = 2.0 103
The strain gauges are on the free surface of a steel structure,
E = 196 GPa = 1.96 105 MPa
= 0.3
E
196
G=
=
75.38GPa
2(1 + )
2 (1
ME 382 HOMEWORK 2 SOLUTION
1.
xx = 3.0 103
yy = 1.5 103
xy = 2.0 103
The strain gauges are on the free surface of a steel structure,
E = 196 GPa = 1.96 105 MPa
= 0.3
E
196
G=
=
75.38GPa
2(1 + )
2 (1
ME 382 Fall 2012
Homework 3
(Due on Friday, September 28th, 2012)
Question numbers are from third editions of the textbooks
(available online and on reserve in the Engineering Library)
Answers given h
ME 382 Fall 2010 HW 9 Solutions
2.
Dowling 11.28.
For 7075T6 aluminum, Y = 523 MPa, KIC = 29 MPam, and the Paris Law for
fatigue crack growth here is given by da/dN = 1.38 x 1011K3.70 m/cycle, where
ME 382 Fall 2012
Homework 6
(Due Friday, October 26, 2012)
The questions identified with * are intended to be straightforward applications or
review of what has been co
ME 382  Winter 2016
Homework 2
Due on January 22, 2016
The$questions$identified$with$*$are$intended$to$be$straight4forward$applications$of$what$has$
been$covered$in$class$or$required$background$from$
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(a) By HW4, we know that the critical pressure is Pc = 9.2 MPa. The required fracture toughness is then given by
1
KIc t
Pc R
2
> 9.0t ) KIc > 3Pc R
r
= 109.4 MPa m1/2
Problem 1
1. (a) In edge dislocation, the Burgers vector is perpendicular to the dislocation line. The
dislocation line moves in parallel to the Burgers vector. In screw dislocation, Burgers
vector is
ME 382 Fall 2015
Midterm 1
Monday, October 12, 2015
This is a closed book exam; students are allowed to use an unmarked copy of the
ME382 data book.
Answer all questions.
Show all calculations (on th
Name: SAMPLE PAGE II
Student ID:
EARTH 113 Planets and Moons Final exam
Please write your name and student ID number on this exam and on the scantron form.
For the 50 multiple choice and True
ME 382 Fall 2018
Homework 8
(Due Friday, March 16, 2018)
* electronic submission *
The answers may have been rounded.
1. A cylindrical pressure vessel of diameter D = 1 m and wall thickness t = 50 mm
ME 382 Fall 2014
Homework 3
(Due on Friday, September 26th, 2014)
Question numbers are from third editions of the textbooks
(available online and on reserve in the Engineering Library)
Answers given h
ME 382 Fall 2014
Homework 10
(Due on Wednesday, November 26, 2014)
1.*
Fatigue life of an alloy given by a r N 0.15
720 MPa
f
Yield strength: Y = 300 MPa, tensile strength: u = 400 MPa
(i) What is fa
ME 382 Fall 2014
Homework 12
(Due Wednesday, December 10, 2014)
Note: Only problems 14 and 6 7 will be graded, and should be turned in. The rest are
practice questions to prepare for the exam.
1. Vu