CHAPTER 5

Question 1

• how much force an
  object can withstand without bending
  or breaking (compression, tension, &
  shear)

Answer 1

STRENGTH

Question 2

refers to a material’s
response to tensile stress, or its
ability to be stretched, rolled or
extruded without breaking.

Answer 2

Ductility

Question 3

represents an ideal
balance between strength and ductility.

Answer 3

Toughness

Question 4

is a measure of a
part’s ability to undergo repeated,
cyclical stress without fracturing or
permanently deforming.

Answer 4

Fatigue resistance

Question 5

• A material’s power to
  resist a permanent change in shape
  when acted upon by an external force

Answer 5

Hardness

Question 6

is a variation of pure shear in which a
structural member is twisted in the manner of
torsional forces produce a rotational motion about
the longitudinal axis of one end of the member
relative to the other end.

Answer 6

Torsion

Question 7

is non-permanent,
which means that when the applied load is
released, the piece returns to its original
shape.

Answer 7

Elastic deformation

Question 8

Is the capacity of a material to
absorb energy when it is
deformed elastically
and then, upon unloading, to
have this energy recovered.

Answer 8

Resilience

Question 9

Metal that experiences
very little or no plastic
deformation upon fracture

Answer 9

Brittle

Question 10

The stress necessary to
continue plastic deformation
in metals increases to a
maximum, point M and then
decreases to the eventual
fracture, point F. Unit Mpa
or psi

Answer 10

Tensile Strength (TS)

Question 11

It is a measure of the
degree of plastic
deformation that has been
sustained at fracture

Answer 11

DUCTILITY

Question 12

tests may be conducted if in-service forces are of
this type.

Answer 12

Compression stress–strain