Engineering 45
Final
Exam
Review
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering-45: Materials of Engineering
1
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
P13.14 Advice
 The Following Problem is
Very SIMILAR to Problem
13.14, but it is NOT the
Same
 The Numbers were
Changed to Protect the
Innocent
Engineering-45: Materials of Engineering
2
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
Problem 13.14 SetUp
Engineering-45: Materials of Engineering
3
1N
SLG
5 mm
1N
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
100 mm
 Problem →
 SodaLime Glass
(SLG) Loaded as
Shown at Right
 Find Using Fig
13.7 the MaxTemperature if
the allowed
extension is
1mm over the
course of a
week’s time
Use the η – ε – σ Reln
 The Viscosity Reln


d dt
 Where
• η ≡ Viscosity
• σ ≡ Tensile Stress
• ε ≡ Tensile Strain
Engineering-45: Materials of Engineering
4
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
Engineering-45: Materials of Engineering
5
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
Use Fig 13.7
490 °C
 Thus at η = 3.08x1012 Pa•S:
T = 490 °C
Engineering-45: Materials of Engineering
6
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
P14.25 Advice
 The Follow Problem is
Very SIMILAR to Problem
14.25, but it is NOT the
Same
 The Numbers were
Changed to Protect the
Innocent
Engineering-45: Materials of Engineering
7
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
Engineering-45: Materials of Engineering
8
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
Engineering-45: Materials of Engineering
9
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt
Engineering-45: Materials of Engineering
10
Bruce Mayer, PE
ENGR-45_Lec-30A_Final_Exam-Review.pptl.ppt