Materials Properties in Ski Design

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Questions and Answers

What does it mean when material properties are described as 'a guideline and a snapshot in time'?

Material properties can vary or change over time. (correct)

Material properties are fixed and unchanging.

Material properties are universally applicable to all applications.

Material properties are only determined by external environmental factors.

Which category of material properties indicates a longer lifetime for materials?

Ecological

Mechanical (correct)

Thermal

Chemical

Why might a material that is resistant to wear be considered potentially more expensive?

It is heavier than alternative materials.

It is limited to specific applications.

It may involve advanced manufacturing processes. (correct)

It requires more insulation.

What is a potential benefit of using non-conductive materials?

No need for insulation. Signup and view all the answers

What advantage does a recyclable material offer regarding waste management?

Can lead to potentially lower costs. Signup and view all the answers

What is the main design parameter to consider when designing a ski?

Bending stiffness Signup and view all the answers

What does the term 'bending stiffness' in relation to skis refer to?

The ability to resist bending when force is applied Signup and view all the answers

What is the length of the ski modeled in the design?

1600mm Signup and view all the answers

Which type of ski primarily uses bending stiffness as a design parameter?

Race / Carving skis Signup and view all the answers

What assumption is made about the ski in the case study?

The ski has a constant cross-section along its length Signup and view all the answers

What is the formula used to define bending stiffness?

Bending stiffness = EI Signup and view all the answers

In the context of ski design, what does 'EI' represent?

Modulus of Elasticity times Moment of Inertia Signup and view all the answers

What aspect of ski design is crucial for ensuring performance in turning and stability?

Bending deformation Signup and view all the answers

Which material family is characterized by being brittle?

Ceramics and glass Signup and view all the answers

What is a key characteristic of polymers compared to other material families?

They are lightweight. Signup and view all the answers

Which of the following is not a type of glass mentioned?

Tempered glass Signup and view all the answers

Which statement about metals is true based on the provided information?

Metals are known for their flexibility. Signup and view all the answers

What is an important consideration for engineers when selecting materials?

A common language to describe material properties. Signup and view all the answers

Which of the following materials is considered non-renewable and non-biodegradable?

Metals Signup and view all the answers

Which of these is an example of a toxic substance?

Asbestos Signup and view all the answers

Which property would most likely NOT be considered mechanical?

Thermal conductivity Signup and view all the answers

When designing a product, which category of material properties includes aspects such as cost and availability?

Economical Signup and view all the answers

Which of the following materials is most appropriate for a diving board?

Steel Signup and view all the answers

Which of the following is a characteristic of toxic substances during disposal?

They require special handling. Signup and view all the answers

What does 'biodegradable' mean in the context of materials?

Materials that break down naturally without harming the environment. Signup and view all the answers

What is a key trend in engineering design as mentioned?

Closer interaction of shape, material, process, and function Signup and view all the answers

Which type of property should be assessed to understand a material's behavior under stress?

Mechanical Signup and view all the answers

What technology is highlighted as essential for multi-material designs?

3D printing Signup and view all the answers

Which material technology is associated with capturing CO2?

Active material Signup and view all the answers

What type of design approach is required for highly complex designs?

Computational design approaches including AI Signup and view all the answers

What does 'tuning material properties by shape' refer to?

Manipulating shape to enhance the properties of the materials Signup and view all the answers

What is a characteristic of multi-material designs?

They involve integrating various materials into one product Signup and view all the answers

What role does AI play in the future of engineering design?

It assists in computational design approaches Signup and view all the answers

What is the significance of integrated designs in engineering?

They enable a synergistic approach to functionality Signup and view all the answers

What is meant by 'function' in the context of product design?

The task of a product or system independent of solutions. Signup and view all the answers

How do shape and material properties influence product functions?

They determine the manufacturable geometries and material compatibility. Signup and view all the answers

What role does the manufacturing process play in product design?

It can change the part properties and affect function. Signup and view all the answers

Which of the following statements is NOT true regarding the dependencies in product design?

Material properties are unrelated to shape requirements. Signup and view all the answers

What happens when the material choice is mismatched with the target shape?

Functioning may be affected and manufacturing can be challenging. Signup and view all the answers

Which of the following best describes a function's role in design dependencies?

It dictates the material selection and shape design. Signup and view all the answers

How are material properties relevant to the manufacturing process?

They interact with the process's ability to handle certain shapes. Signup and view all the answers

Which of the following best encapsulates the concept of dependencies in engineering design?

They require careful consideration of interrelated elements like function, shape, and materials. Signup and view all the answers

Study Notes

Engineering Design and Material Selection

Lecture 10 focused on materials and their properties
Course schedule outlined topics, case studies, quizzes, and lecturers for each week.
Week 10 covered material properties and the relationship to additive manufacturing.
Learning objectives covered categorization of materials into families, understanding mechanical behavior, relating stress and strain via material laws, and exploring bending behavior.
A case study on ski design was presented.
This included a function of force transmission from the body to the ski, requirements to withstand environment forces, bend at a desired level, provide torsional resistance, reduce vibration, turn easily, resist environment temperatures and wear.
Ski design is a compromise of design variables to match skier's weight, technique and use.
The different layers of a ski were depicted to show the different material layers.
An overview of design dependencies detailed function as a task independent of solutions, dependencies such as shape, size, and features are needed to fulfil a function.
Functions require specific material properties (e.g., material elasticity and thermal properties).
Material choice and target shape interact with the manufacturing process
Manufacturing process influences the design function by changing part properties
A history of material shapes technology was discussed.
The history of material technology, along with the future of materials in engineering designs was addressed.
This included discussion on "Floating Steel," "Artificial Tree", and "Multi-Material Designs"
A vast choice of material was visually represented, showing different materials like metal, polymers, glass, and ceramics.
Material families were categorized and described including metal, glass, hybrids, polymer, and ceramic.
Key properties of materials were listed, such as stiffness, strength, and brittleness.
The importance of engineers having a common language when selecting materials was highlighted.
Lecture noted the mechanical, thermal, electrical, optical, magnetic, chemical, economic, and ecological properties of materials.
The importance of mechanical properties, for ensuring the integrity and safety of products, was highlighted.
The relationships between forces and deformation in a body were described through diagrams.
The different behavior of materials in different shapes (e.g., ski vs. snowboard) was explained.
Stress and strain were defined in terms of force/area, and deformation to initial configuration respectively.
Basic equations for Young's modulus were presented, allowing calculation of safety against failure.
Material testing was explained as a way to determine the stress-strain curves in materials.
The importance of stress-strain curves and Hooke's Law was presented in terms of linear elastic behavior.
The spring analogy of Hooke's Law explains the relationship between force, elongation and stiffness.
The concept of bending and torsion were explored.
Flexural rigidity and the second moment of area were defined within the context of three-point bending tests.
Different properties of materials in relation to bending stiffness and distribution across skis were explored.
Case study questions related to ski bending, identifying parameters for ski design.
Methods for calculating deflection in skis were detailed.
Material Selection and their Properties explained how category, material, function, and properties are related to sustainable design
An overview of Life Cycles and Materials including renewable, non-renewable, inorganic, organic materials, and identifying toxins
Exercises explained how to find Young's Modulus for a sample.
Overview discussion of material selection strategies included topics like translation, screening, ranking, and validation.
The design process for selecting materials, involving stages like planning, concept design, and system level design, detail design, were presented along with the phases for evaluation, verification, and refinement, and concluding with production or ramp-up.
A general approach involved translating requirements into design objectives, evaluating the limits (constraints), and producing a ranked list of material options.
Computer-aided material selection software, allowing evaluation of various materials and their properties using a variety of 2 dimensional and 3 dimensional plots, was discussed, including example diagrams.
Design heuristics for additive manufacturing (AM), presented in 8 categories, were discussed.
Additional design considerations for AM included the importance of part consolidation, material distribution, and embedded/enclosed geometries.
An example case study on ski bending included considerations for the functions, technical, and material requirements, along with constraints, objects, and free variables.
Design guidelines for machining to improve manufacturing were stated.
Different manufacturing processes for various purposes (castings, molding) and materials were mentioned.
Additive manufacturing (3D printing) processes were presented.
Isotropy and anisotropy of material properties were distinguished.
The advantages and disadvantages for manufacturing using various methods (machining, casting, and additive manufacturing) were examined.
Topics like process selection strategies, including steps in screening, ranking and validation were detailed.
Additional topics focused on processes selection strategies involving compatibility matrices, and methods for economic batch size analysis were presented.
The process of designing for manufacturing (DfM) was detailed as a convergent method that focuses on the relationship between the design process steps of manufacturing.
Manufacturing processes for material selection strategies, involving examples such as turning and the cost analysis when considering batch sizes were explored.

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Description

Explore the intriguing relationships between material properties and ski design in this quiz. Delve into concepts like bending stiffness, wear resistance, and the use of non-conductive materials, as well as design parameters crucial for ski performance. Test your understanding of how these elements impact durability and functionality.