Material Selection Techniques Flashcards
What are the properties of materials?
Surface Temp Expansion Coeff Conductivity Diffusivity Density
What are design Limiting Properties
Properties that limit the performance of the application, Must exceed target values for a product to meet performance
In material selection what is the function of constraints
Setting property limits
In material selection what is the function of objectives
They define material indices of which we seek extreme values
Summarise the selection strategy
All Materials Translate design requirements screen using constraints rank using objective seek documentation final material choice
Whats the purpose of computer aided selection (ces)
It can be used to isolate the subset of materials that pass all selection stages
What are the functions of ashby diagrams
To visually represent properties of materials and display lots of materials making selection easier
what is the function of time plots
Diagrams that show progressive filling for all material properties showing how they have developed over time to meet plans
What should design requirements specify
What a product should do, not what properties its material should have
What is translating
Converting the design requirements into constraints and objectives that can be applied to a materials database
What are material indices
A value that allows maximum property values to be found for a material. Sum of material properties, functional and geometric constraints.
