Chapter 5 - Selected concepts for materials selection in engineering design Flashcards
Market Needs
- Concept
- Embodiment
- Details
Market Needs - Concept
- All materials loss precision of details
- Function Modeling (Geometric and Cost Modeling)
Market Needs - Embodiment
Subset of materials
Market Needs - Details
- Design for manufacturing
- Design for Assembly
- Ultra material ultra high precision
Component Properties
Fulfillment of the technical functions of a component
Component Behavior
Fulfillment of the technical functions of a component over its entire time in service (lifetime)
Components Costs
Sum of all developments (R&D), materials and manufacturing
Component Efficiency
Component cost plus the costs associates with the use( energy requirement, consumption items)
Top priority for Ehrenspiel & Kiewert
Costs during product design and development
Ehrenspiel & Kiewert: Suggest to “Clarify Task”
Checklist with numerous material properties
Ehrenspiel & Kiewert: Suggest to “Solution Search”
- Checklists
- Additional Catalogs
- Intuitive procedures
Ehrenspiel & Kiewert: Suggest to “Analysis”
Calculations and experiments are used as support for the decision
Ehrenspiel & Kiewert: Suggest to “Evaluation and Decision”
Selection of the material whose property profile come closest to the required. requirements profile.
NO INDIVIDUAL DECISION → INTERDISCIPLINARY TEAM
Material selection with the help of Characteristics
The formation of characteristics enables a quantitive comparison of the material alternatives
Restriction: Requirements and properties must be quantified
Material Selection with material diagrams (Ashley Maps)
Graphical selection with the aid of property charts, in which one or two materials properties are plotted on bar-charts or in logarithmically applied areal diagrams
Datasets do not allow comparison, we need meaning
