21 Questions
Which type of failure is associated with stress corrosion?
Crack of titanium
What is a method mentioned to prevent oxidation of contacts in electronics?
Gold plating
Which type of properties define the operational limits of a material?
Structural properties
What may be an issue over time in ductile materials?
Creep
Which property is important to consider when there's cyclic loading?
Fatigue properties
What are materials properties categorized as in design?
Structural or Functional
Which aspect is important when selecting materials according to the text?
Risk of thermal degradation
'Thermal shock testing' is associated with which type of component?
'Electronics'
'Fatigue properties' are particularly important under which condition?
'Cyclic loading'
Which type of property defines the 'operational limits' of a material?
Structural properties
What factor(s) strongly influence stress intensity factors K in materials?
Crack opening mode, specimen/material geometry
What is the purpose of a critical stress intensity factor (e.g. KIC) in material testing?
To identify the value at which the specimen fully fractures due to crack propagation
What does the S-N curve indicate about a material?
The fatigue limit below which the material has an infinite service life
What is High Cycle Fatigue (HCF) characterized by?
High frequency and low stress amplitude
What aspect determines the stress intensity at an internal crack in an infinite plate for Mode I cracks?
Correction factor Y
What material issue can result from failing to consider cycling within the elastic limit?
Catastrophic failure despite staying within the elastic limit
What property does the critical strain energy release rate help determine in materials?
Fracture toughness
Which property is crucial to consider when there is cyclic loading on a material?
Fatigue properties
What issue may arise over time in ductile materials?
Creep deformation
Which factor is essential to consider when selecting materials to prevent thermal degradation?
Thermal shock resistance
Which type of failure can titanium experience due to stress corrosion?
Crack
Study Notes
- Course assessment includes 1 written exam with 2 questions, potentially online and open book if social distancing measures are in place.
- Coursework consists of 2 pieces, one set by the lecturer, likely an essay or group presentation, due by the end of Week 7.
- For lecture content and assessment questions, students are advised to use the MyPlace forum instead of emailing the lecturer directly.
- Materials Science and Engineering focuses on developing new materials based on understanding their structure, processing, and properties for specific applications.
- Material families include Metals and Alloys, Ceramics, Glasses, Polymers, and Composite materials like Metal Matrix Composites (MMCs) and Natural Composites.
- Engineers have less control over properties like density and cost, but more control over structural properties (stiffness, strength, etc.) which define operational limits.
- Stress-strain testing, fatigue properties, stress intensity factors, and material failure modes are critical considerations in material engineering.
- Lecture topics cover structural properties of materials, crystals, defects, phases, microstructures, ceramics, glasses, light alloys, high-temperature alloys, and composites.
This course assessment for 'Composite Materials and Structures for Engineering Students' by Grove includes a written exam with 2 questions, 2 pieces of coursework (one set by the instructor), and the coursework submission deadline by the end of Week 7. The exam may be online and open book if social distancing measures are still in place.
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