Material selection, requirements and charatcteristics

Question 1

What is mechanical environment?

Answer 1

• Static stress
• Dynamic load addition
• Stress concentration
• Fatigue loading
• Impact loading
• Wear

Question 2

What is chemical environment?

Answer 2

• Atmosphere
• Medium (ex. fresh/salt water)
• Impurities

Question 3

What is a requirements profile?

Answer 3

Summary of functions the material in a certain
component needs to fulfill in an environment.
Includes:
- mechanical environment
- chemical environment
- radiation/electric and magnetic fields
- biologic environmet

Question 4

What are mechanical properties?

Answer 4

for example: young’s modulus (stiffness), strength, fracture toughness, density

Question 5

What is property profile?

Answer 5

Compilation of material candidate properties,
valid in the representative environment.

Question 6

What is analyzed in the design requirements?

Answer 6

• function - what does the material/component do?
  -constraints - What essential conditions must be met?
• objectives - What is to be maximised or minimised?
• free variables - Which design variables are free?
  From which we obtain screening criteria and ranking criteria

Question 7

What does the design processmlook like?

Answer 7

1. market need
2. concept
3. embodiment
4. detail
5. production
6. use
7. disposal