Performance Indicies & Materials Selection

Question 1

What is the equation for the performance index?

Answer 1

p = f((functional requirements, F), (geometric parameters, G), (materials properties, M)) = f(F,G,M)

Question 2

What are the functional requirements for performance?

Answer 2

Performance specified by the design (e.g. must be able to carry a certain load)

Question 3

What are the geometric parameters for performance?

Answer 3

size and shape

Question 4

What are the material properties for performance?

Answer 4

density and modulus

Question 5

What should we do to optimise performance?

Answer 5

to optimise performance want to maximise/minimise p
assuming that the individual factors are separable
p = f1(F)f2(G)f3(M)
hence need to maximise/minimise f3(M) regardless of the other functions