Chapter 6 L13 Flashcards
Why is there a need for structured material selection?
It is used for finding a balance between functional requierements and constrains/restrictions
What is the primarly function of a structure?
Transmit forces through space under minimal weight and costs
What is the part design? Name the major stages
It is the type of information needed throughout the process. The major stages are:
- Concept design
- Embodiment design
- Detail design
How does the type of information change in the different stages?
- Concept design: Breadth (amplio) and rapid information
- Embodiment design: Needed already a subset of a material. Higher precision and detail
- Detail design: Very few material in scope. Even higher precision
What influences the material selection?
- Function (of the part)
- Shape
- Process (needed to manufacture the part)
What is the difference between revolutionary and evolutionary materials?
- Revolutionary: ↑ Performance ↑ Risk. Introduced material for the first time
- Evolutionary: ↓ Performance ↓ Risk. Slightly changed material
Name the steps in material selection.
- Translation
- Screening
- Ranking
- Documentation
Explain the steps for material selection.
- Translation: What do we need and how do we need it (ex: support compression, low price, “x” not negociable)
- Screening: First rejection of materials
- Ranking: Rank remaining materials
- Documentation: Get info about material (previous usage, availability in country, …)
What names are used for the different ways of carring loads?
- Column: Carries compression
- Shaft: Carries torions
- Tie: Carries tension
- Beam: Carries bending
What are the differences between hard and soft constrains? Give one example for each please.
- Hard constrains: Not negociable (strength)
- Soft constrains: Negociable (costs)
How are material property charts used?
“Notes”
What is method is used for ranking materials?
Material indices
