Questions and Answers
What is the role of the matrix in composite materials?
Which type of resins are classified as thermosetting resins?
Which resin system is specifically noted for its inadequate strength for primary structural components?
What is a significant limiting factor in the use of pre-impregnated materials?
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Which matrix system is utilized for manufacturing both primary and secondary composite structures?
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What is the primary purpose of a hybrid composite?
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Which type of fiber is specifically suitable for high-temperature applications?
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How can unidirectional fiber orientation be recognized?
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What are the two primary weave styles used in composite fabrics?
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Which composite fiber is known for its distinct yellow color?
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What are the two transparent thermoplastic materials used in aircraft windows?
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Why are sandwich core panels favored in aircraft composite building?
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What advantages does thermoplastic resin have for windscreen production?
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Study Notes
Hybrid Composites
- Hybrid composites combine two or more types of composite materials, capitalizing on the advantages of each material type.
High-Temperature Applications
- Ceramic fibres are specifically designed for high-temperature applications, offering heat resistance.
Unidirectional Fiber Orientation
- Unidirectional fibers have their major fibers aligned in one direction, providing strength predominantly along that direction.
Weave Styles in Composite Fabrics
- Composite fabrics primarily utilize three weave styles: unidirectional, bidirectional, and multidirectional.
Aramid Fiber
- Aramid fibers are known for their yellow color, with the commercial name Kevlar®, recognized for strength and durability.
Transparent Thermoplastic Materials
- Two types of transparent thermoplastic materials used in aircraft windows and windshields are cellulose acetate and acrylic.
Sandwich Core Panels
- Sandwich core panels are favored in aircraft construction due to their high strength-to-weight ratio.
Fill Fibres Orientation
- Fill fibres run in the same direction as the warp, contributing to the fabric’s overall structure.
Thermoplastic Resin Benefits
- Thermoplastic resins are chosen for windscreen production due to their impact resistance, clarity, formability, flexibility, durability, and UV resistance.
Resin Matrix Function
- The resin matrix serves as a bonding agent that surrounds the fiber, enabling stress transfer to the reinforcing fibers.
Types of Resins
- Polyester and epoxies are categorized as thermosetting resins, which harden after curing.
Polyester Resin Limitations
- Polyester resin is primarily used for fiberglass fairings and secondary structures due to its insufficient strength for primary structural components.
Epoxy Matrix Usage
- The epoxy matrix is utilized for both primary and secondary composite structures, offering higher performance.
Pre-Impregnated Materials Limitation
- A key limiting factor in the use of pre-impregnated materials is their shelf life, governing storage and usability.
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Description
Explore the fascinating world of composite materials, including hybrid composites and the unique properties of aramid fibers like Kevlar®. This quiz delves into the various weave styles in composite fabrics and their applications in high-temperature environments. Test your knowledge on the specifics of transparent thermoplastic materials and sandwich core panels in aircraft construction.
