Podcast
Questions and Answers
Which of the following is considered a constraint in material selection?
Which of the following is considered a constraint in material selection?
What is the purpose of reinterpretation in the design process?
What is the purpose of reinterpretation in the design process?
Which of these is an example of an objective in the material selection process?
Which of these is an example of an objective in the material selection process?
What differentiates 'free variables' from 'constraints' in design requirements?
What differentiates 'free variables' from 'constraints' in design requirements?
Signup and view all the answers
Which of the following directly contributes to the overall functionality of a design?
Which of the following directly contributes to the overall functionality of a design?
Signup and view all the answers
What is one major requirement for the bending stiffness of the ski core?
What is one major requirement for the bending stiffness of the ski core?
Signup and view all the answers
Which of the following should the yield strain (elastic limit) be?
Which of the following should the yield strain (elastic limit) be?
Signup and view all the answers
What dimensional constraints are given for the ski core?
What dimensional constraints are given for the ski core?
Signup and view all the answers
Which objective is NOT mentioned for the ski core?
Which objective is NOT mentioned for the ski core?
Signup and view all the answers
What is the maximum allowable elastic modulus (E) for the ski core material?
What is the maximum allowable elastic modulus (E) for the ski core material?
Signup and view all the answers
What is the purpose of ranking candidates after the screening step?
What is the purpose of ranking candidates after the screening step?
Signup and view all the answers
What can be used to quantify the overall importance of multiple objectives during candidate selection?
What can be used to quantify the overall importance of multiple objectives during candidate selection?
Signup and view all the answers
Which of the following is not an example of a property that could be part of a performance index?
Which of the following is not an example of a property that could be part of a performance index?
Signup and view all the answers
What should be checked regarding the top-ranking candidate in material selection?
What should be checked regarding the top-ranking candidate in material selection?
Signup and view all the answers
Which approach helps keep the most performant materials during the selection process?
Which approach helps keep the most performant materials during the selection process?
Signup and view all the answers
Which of the following best describes a performance index?
Which of the following best describes a performance index?
Signup and view all the answers
What does the process of maximizing or minimizing a measure of performance typically involve?
What does the process of maximizing or minimizing a measure of performance typically involve?
Signup and view all the answers
What is a common misconception regarding the suitability of the top-ranking candidate?
What is a common misconception regarding the suitability of the top-ranking candidate?
Signup and view all the answers
What is the minimum yield strain required for materials to be considered feasible?
What is the minimum yield strain required for materials to be considered feasible?
Signup and view all the answers
What is the maximum value for Young's modulus for materials to be considered feasible?
What is the maximum value for Young's modulus for materials to be considered feasible?
Signup and view all the answers
Which of the following materials is not typically classified as feasible?
Which of the following materials is not typically classified as feasible?
Signup and view all the answers
Which category of materials includes only feasible options according to the screening criteria?
Which category of materials includes only feasible options according to the screening criteria?
Signup and view all the answers
What does the ranking step involve according to the provided parameters?
What does the ranking step involve according to the provided parameters?
Signup and view all the answers
What is one of the main concerns of the materials discussed in the screening criteria?
What is one of the main concerns of the materials discussed in the screening criteria?
Signup and view all the answers
Which of the following natural materials is listed as a part of feasible materials?
Which of the following natural materials is listed as a part of feasible materials?
Signup and view all the answers
What parameter involves looking up data for the remaining materials?
What parameter involves looking up data for the remaining materials?
Signup and view all the answers
What does limiting two properties at once do to material selection?
What does limiting two properties at once do to material selection?
Signup and view all the answers
In the performance index for material selection, how is the index formulated?
In the performance index for material selection, how is the index formulated?
Signup and view all the answers
Which of the following steps is NOT part of the approach to material selection?
Which of the following steps is NOT part of the approach to material selection?
Signup and view all the answers
What is a characteristic of the Ashby chart used in material selection?
What is a characteristic of the Ashby chart used in material selection?
Signup and view all the answers
What does the equation $P=\frac{y}{x^{1/\alpha}}$ represent in the context of material selection?
What does the equation $P=\frac{y}{x^{1/\alpha}}$ represent in the context of material selection?
Signup and view all the answers
Why is it important to consider material properties during the design process?
Why is it important to consider material properties during the design process?
Signup and view all the answers
Which of the following does NOT apply to the material classification system?
Which of the following does NOT apply to the material classification system?
Signup and view all the answers
What does the variable 'P' represent in the performance index equation?
What does the variable 'P' represent in the performance index equation?
Signup and view all the answers
Which material is considered a renewable resource?
Which material is considered a renewable resource?
Signup and view all the answers
What aspect of material selection does not primarily focus on?
What aspect of material selection does not primarily focus on?
Signup and view all the answers
Which material is diagnosed as non-renewable due to its production properties?
Which material is diagnosed as non-renewable due to its production properties?
Signup and view all the answers
What tool is useful for evaluating material trends and aiding material selection?
What tool is useful for evaluating material trends and aiding material selection?
Signup and view all the answers
What does validating a material choice ensure?
What does validating a material choice ensure?
Signup and view all the answers
What is a notable drawback of plywood as a material?
What is a notable drawback of plywood as a material?
Signup and view all the answers
Which material option offers a fast production time with high throughput?
Which material option offers a fast production time with high throughput?
Signup and view all the answers
What is the primary focus when screening and ranking materials in selection processes?
What is the primary focus when screening and ranking materials in selection processes?
Signup and view all the answers
Study Notes
Engineering Design and Material Selection
- Lecture 11 focused on Material Selection.
- The lectures were delivered by Prof. Dr. Kristina Shea and Dr. Tino Stankovic.
Course Schedule
- Week 1: Introduction and Sketching
- Week 2: Introducing Engineering Design (Health Case Study)
- Week 3: Technical Drawing: Projections and Cuts
- Week 4: CAD: Introduction and Modeling Operations
- Week 5: CAD: Features and Parametric Modeling (Future Mobility Case Study)
- Week 6: CAD: Freeform Modeling
- Week 7: CAD: Assemblies and Standard Mechanical Parts
- Week 8: Technical Drawing: Dimensioning (Health Case Study)
- Week 9: Sustainability in Engineering Design
- Week 10: Materials and their Properties
- Week 11: Material Selection (Sustainable Materials Case Study)
- Week 12: Manufacturing Processes with Focus on Additive Manufacturing
- Week 13: Review and Q+A
Learning Objectives
- Understanding factors influencing material selection during the design process.
- Learning the concept and creation of Ashby charts and their use for material selection.
- Mastering strategies for material selection and their application to examples.
Oxo Goodgrips Peeler
- Material: Santoprene (a polymer behaving like rubber but processed like a thermoplastic).
- Components: Oval handle, Fins, Countersunk Hole.
- Key features of each component: Functional, aesthetic, and manufacturing considerations, in the context of ergonomics, comfort and aesthetics of the handle.
Challenge of Material Selection
- There are many suitable materials/ too many materials, requiring a selection strategy.
When to Select Materials
- Material selection is an iterative and convergent process.
- It occurs throughout different phases of design - Planning, Concept, System-Level, Detail.
Material Selection Strategies - General Approach
- Steps of Material selection process - Translation, Screening, Ranking, Validation.
- Techniques for reinterpretation of design requirements
- Isolation of viable materials through screening
- Ordering viable materials based on performance
- Seeking documentation and validation for top-ranked candidates.
Computer-Aided Material Selection
- Computer software can isolate suitable materials through various filtering and combination steps for screening.
One-Dimensional Material Selection
- A linear graph displaying different materials, based on a variety of parameters, such as Young's Modulus versus density..
Two-Dimensional Material Selection – Ashby Charts
- Displays properties on a two-dimensional plot, helping to visualize material selection.
- Uses logarithmic scales to visualize a wider range of property magnitudes.
Two-Dimensional Material Selection - Performance index
- Formulate the performance index.
- Guideline lines, visualizing equal performance or quantities in a 2D plot.
Example: Minimum Mass Design – Stiffness – Beam in Bending
- Illustrates the method of identifying parameters and selecting correct material when other factors (such as geometric constraints) are given.
Exercise 11
- Exercise asks to identify best materials for various objects: a diving board, an ice axe, and three longboards.
Material Selection - Wrap Up
- Material selection is a process considering function, manufacturability, sustainability, relevant screening and ranking.
- Ashby charts are useful for material selection.
- Sustainability indices are important.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz focuses on Lecture 11 of the Engineering Design course, which emphasizes the crucial topic of Material Selection. Engage with questions relating to the sustainable materials case study, and enhance your understanding of how material properties influence engineering design decisions.
