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Mece 260 Final

Terms and such for the Mece 260 Final exam.

Terms

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loaded in shear
Adhesive bonds perform best when what?
isotropic
If the Young's modulus is the same in every direction the material is what?
non-homogenous, composed of two or more constituents
Name the two characteristics of composite materials.
elastomers, epoxies, polyesters, urethanes
Name four thermosets.
stress is constant over the cross section
Engineering stress assumes what?
sintering
The powder metallurgy process is often called what?
sandcasting
This solidification process is often used to make parts from aluminum or castiron.
metal extrusion
Aluminum is often deformed using this process.
resistance to heat and environmental degredation, strength and hardness, abrasion resistant
List the three beneficial characteristics of ceramics.
heat and electricity
Polymers are poor conductors of what?
Modulus of elasticity
The ________ relates stress and strain in the elastic range.
free surface, contact, stress, selective
Name the four types of corrosion.
difficult expensive
Ceramics are ___ and ___ to machine or form.
long molecule chains
Polymers are made of carbon and hydrogen forming what?
fail-safe principle
In this safety principle the failure of the system won't lead to grave consequences.
heat and electricity
Metallic materials conduct what well?
safe-life, fail-safe, redundancy
Name the three safety principles.
metal matrix, fibre-reinforced polymers
Name two examples of composite materials.
constant
Engineering strain assumes the strain is ___ between guage points.
carbon and hydrogen
Polymers are predominantly composed of what?
environmental degradation
Polymers are mostly resistant to what?
investment casting
In this solidification process foam is burned out in the pouring of metal.
wax, foam
Investment casting uses ____ or _____ patterns which are melted or burned out prior or during pouring of cast metal.
permanent deformation
Plastic strain is the consequence of what?
ductile
Metallic materials are easily stretched or bent into a permanent shape meaning they are what?
powder metallurgy
In this solidification process a powder is consolidated and then fused together.
composite materials
These materials are non-homogenous and composed of two or more constituents.
brazing
This joining process is similar to soldering but uses fillers with higher melting points.
self-help
According to the ___ principle one uses natural system effects to achieve design objectives.
closed
Flow lines of forces must always be what?
stronger and more rigid
Thermosets are what compared to thermoplastics?
facilitating assembly and disassembly, ensuring materials are not mixed, labeling materials and components
The three concepts of design for recycling are what?
material selection, component design, fastener selection
Name the three categories of recycling design.
lasting strong
Metallic materials are long ___ and relatively ___.
zinc, magnesium, copper, chromium
Aircraft grade aluminum (7075) contains the elements:
ferrous materials
Iron based materials are what?
plastic injection molding
Lego is made from this solidification process.
cross linked
In thermosets chain molecules are ___ to each other.
yield strength, ultimate strength
For ductile materials we use ________ and for brittle materials we use _________ when it comes to material strength.
once
Thermosets can be formed how many times?
inexpensive
In terms of cost, polymers are what?
self-help principle
The sealing of a car tire is and example of what?
thermosets
Elostomers and polyesters are examples of what?
non-ferrous materials
Aluminum, magnesium and titanium are examples of what?
permanent mold casting
In this solidification process steel molds are coated with a refractory agent.
sand casting, investment casting, permanent mold casting, die casting, powder metallurgy, plastic injection
Name all six solidification processes.
thermoplastics
Polyethylene and polystyrene are what?
metal oxides
Ceramics are frequently made of what?
deep drawing
This deformation process uses a punch to shape sheet metal.
Ceramics
Zirconium Oxide, Alumina, and Silica are all examples of
reduced thermal shrinkage
Powder metallurgy is beneficial because it leads to what?
loaded in tension
Ceramics should not be
homogenous
If the Young's modulus is the same at every location the material is what?
thermoplastics and thermosets
The two main classes of polymers are?
die casting
Liquid metal is injected into the mold at high pressures.
Adhesive Bonding, Welding, Soldering, Brazing, Bolting, Riveting
Name all the joining processes.
300
Titanium has a relative machining cost of ___ percent.
lightweight
In terms of weight, polymers are what?
aluminum
Extrusion presses are mainly used for
chain molecules heated
In thermoplastics the very long ___ ___ slide past each other when the material is ___.
ductile
Which type of failure provides more warning: ductile or brittle?
stiffness
The modulus of elasticity is a measure of what?
machine form
Metallic materials are usually easy to ___ and ___.

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