Part – A : (5 X 16 = 80 MARKS) (Answer any five from the following)
1. a. Explain in detail the structure, composition, and engineering properties of wood used in aircraft construction. CO1 b. Discuss the advantages and disadvantages of hardwoods and softwoods and mention their applications in aircraft wing spars and stringers. CO1
2. a. Compare the nickel-based, cobalt-based, and iron-based superalloys in terms of composition, mechanical strength, temperature capability, and typical engine applications. CO2 b. Analyze the role of manufacturing, heat treatment, and surface treatment processes in improving the performance and durability of superalloy components used in aircraft engines. CO2
3. a. Explain the properties, advantages, and typical applications of lightweight metals such as aluminium, magnesium, beryllium, and titanium in aircraft construction. CO3
b. Discuss the engineering significance and limitations of using lightweight metals in high-performance aerospace structures. CO3
4. a. Explain the types, properties, and fabrication techniques of non-oxide ceramics used in aerospace applications. CO4
b. Discuss the microstructural development and mechanical behaviour of silicon nitride matrix composites and oxide materials used in aircraft structures. CO4
5. Compare polymer matrix composites, sandwich composites, and polymer nanocomposites in terms of constituent materials, fabrication methods, and performance characteristics. CO5
6. a. Explain the historical development of smart materials and describe the properties and working of piezoelectric materials used in aerospace systems. CO6
b. Analyze the properties, engineering effect, and functional mechanism of Shape Memory Alloys (SMAs) and their applications in adaptive aerospace structures. CO6
7 Analyze the fracture and fatigue characteristics of non-oxide ceramics and their implications for high-temperature aerospace applications. CO4
Part – B : (1 X 20 = 20 MARKS) [Compulsory Question] 8. a. Evaluate the selection criteria and performance trade-offs among metallic alloys, polymer matrix composites, and ceramic materials for use in aircraft structural components subjected to high temperature and fatigue loading. CO4 CO5
b. Analyze how the integration of smart materials such as shape memory alloys, piezoelectric ceramics, and conducting polymers can enhance structural health monitoring and vibration control in aerospace systems. CO6
Course Outcomes: • CO1 Explore the use of conventional materials for aircraft structures. • CO2 Learn the properties and composition of alloys for aerospace application. • CO3 Design and analyse light weight metals and composite structures. • CO4 Understand the definition and classification of aerospace composites. • CO5 Choose suitable manufacturing method for composite materials. • CO6 Examine smart and intelligent material characteristics and engineering effect.
