e1
EXERCISES
1. What is the difference between:
• resilience and toughness
• toughness and fracture toughness
• bulk modulus and shear modulus
• nominal stress and normal stress
2. The net potential energy between two adjacent ions
can be represented by an equation of the form:
3. In the section “Elastic Constants,” we encountered
Young’s modulus as the ratio stress:strain for mate-
rials that are deformed elastically. While it was
implicit that we were dealing with nominal stress
and nominal strain, we did not state this explicitly.
We didn’t consider whether a different value of stiff-
to the initial slope of a nominal stress versus nominal
strain plot.
4. Party balloons are easier to inflate if they are first
placed in a (domestic) freezer for an hour. Why?
5. Calculate a numerical value for the toughness of a
sample breaks
• the plastic deformation is described by the equation
(sheets) from which the boilers were constructed.
However, this “solution” led to an increase in the
likelihood of a catastrophic explosion. Why?
7. Taking into account practical considerations, experi-
ence, and plausible information that you can glean
from the Internet, suggest several properties (in addi-
CHAPTER I.1.3
Bulk Properties of Materials