Pregunta 1
Pregunta
Choose all primary material selection issues
Respuesta
-
shape
-
cost
-
density
-
material properties
-
function
-
other
-
external factors
-
hardness
-
process (fabrication)
-
device variables
Pregunta 2
Pregunta
formula for density
Respuesta
-
stress/strain
-
mass/volume
-
delta L/L
Pregunta 3
Pregunta
The yield strength is where material starts to plastically deform
Pregunta 4
Pregunta
Formula for modulus of elasticity
Respuesta
-
mass/volume
-
stress/strain
-
delta L/L
Pregunta 5
Pregunta
Definition of modulus of elasticity
Respuesta
-
where material property begins to plastically deform
-
maximum stress a material can withstand
-
slope of the elastic region of the stress/strain curve
-
where the material fractures
Pregunta 6
Pregunta
Stress depends on the type of material being tested
Pregunta 7
Pregunta
Definition of Ultimate Tensile Strength (UTS)
Respuesta
-
Slope of the elastic region of a stress strain curve
-
maximum stress a material can withstand
-
stress where a material fails
-
where material starts to plastically deform
Pregunta 8
Pregunta
Resistance to plastic deformation or scratching or bending is...
Respuesta
-
hardness
-
fatigue endurance limit
-
yield strength
-
fracture toughness
Pregunta 9
Pregunta
the hardness of metals is tested with which test
Respuesta
-
brinell or rockewell
-
durometer score
Pregunta 10
Pregunta
the harness of polymers is tested with
Respuesta
-
brinell or rockewell
-
durometer score
Pregunta 11
Pregunta
Fatigue endurance limit does not apply to non-ferrous metals
Pregunta 12
Pregunta
For a material to be tough it needs to be what two things
Respuesta
-
ductile
-
durable
-
strength
-
stiff
Pregunta 13
Pregunta
which material has the highest modulus and density
Pregunta 14
Pregunta
Aluminum has a modulus and density that is [blank_start]1/3[blank_end] the value of steel (ratio)
Pregunta 15
Pregunta
the equation for stress (in variable form) is [blank_start]F/A[blank_end]
Pregunta 16
Pregunta
Pure shear stress is generally 1/2 of what?
Respuesta
-
normal stress
-
torsional shear stress
-
tensile strength
-
flexural stress
Pregunta 17
Pregunta
Equation for flexural normal stress
Respuesta
-
Mc/I
-
F/A
-
delta L/L
-
bd^3/12
Pregunta 18
Pregunta
In the equation Mc/I, what does the c stand for?
Pregunta 19
Pregunta
Deflection is dependent on material type
Pregunta 20
Pregunta
What is the equation for deflection?
Respuesta
-
FL/AI
-
FL/AE
-
delta L/L
-
I/c
Pregunta 21
Pregunta
What is the equation for Factor of safety
Pregunta 22
Pregunta
In the factor of safety equation, which stress value is higher?
Respuesta
-
stress allowable
-
stress actual
Pregunta 23
Pregunta
What material can not be heat treated, only cold worked?
Respuesta
-
400 SS
-
Aluminum
-
Steel
-
300 SS
-
Titanium
Pregunta 24
Pregunta
Cyclic loading can cause a material to fail at stress values higher than the yield stress
Pregunta 25
Pregunta
What material does not have an endurance limit
Pregunta 26
Pregunta
A material is not likely to fail between the [blank_start]endurance limit[blank_end] line and the yield stress line