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 ___.