AIRCRAFT STRUCTURE QUIZ REVIEWER.docx

**AIRCRAFT STRUCTURE QUIZ REVIEWER (GROUP 4 REPORT COVERAGE)**\ \ **Airplane structures juggle three competing demands:** **Utmost Safety:** The airframe must prioritize passenger safety above all else. **Lightweight Durability:** The design should minimize weight for efficiency while ensuring the...

**AIRCRAFT STRUCTURE QUIZ REVIEWER (GROUP 4 REPORT COVERAGE)**\ \ **Airplane structures juggle three competing demands:** **Utmost Safety:** The airframe must prioritize passenger safety above all else. **Lightweight Durability:** The design should minimize weight for efficiency while ensuring the structure lasts its lifespan. **Cost-Effectiveness:** Both manufacturing and long-term ownership costs need to be kept low. **PROPERTIES OF MATERIAL** **Physical Properties:** These are inherent qualities that can be measured, like density, melting point, conductivity, and how it expands with heat. **Mechanical Properties:** These describe how the alloy behaves under force, including strength, ductility (flexibility), and wear resistance **MECHANICAL PROPERTIES:** - **Strength:** A material\'s overall capacity to resist force. - **Hardness:** Resistance to scratching or indentation. - **Brittleness:** Tendency to break without significant bending. - **Toughness:** Ability to absorb impact. - **Plasticity:** Permanent deformation under small forces. - **Elasticity:** Ability to return to original shape after a load is removed - **Stiffness:** Resistance to bending under pressure. - **Malleability:** Ability to be flattened into thin sheets - **Ductility:** Ability to be drawn into thin wires. - **Compressive Strength**: Ability to withstand pushing or squeezing forces. - **Tensile Strength:** Ability to withstand pulling or stretching forces. - **Durability:** Resistance to wear, tear, weather, and corrosion. **PHYSICAL PROPERTIES** - **Thermal Conductivity:** How well a material conducts heat. - **Electrical Conductivity**: How well a material conducts electricity. - **Magnetic:** Ability to be attracted by a magnet. - **Corrosion Resistance**: How well a material resists environmental damage. - **Fusibility:** How easily a material melts when heated. **COMMON MATERIAL USED** **\ Material Properties:** These are inherent to the material itself (e.g., strength, weight) and independent of its shape. **Structural Properties:** These depend on both the material and the design (shape) of the structure. **Manufacturing Processes:** These are influenced by the material\'s properties **three aspects are interconnected. Changing one can affect the others:** - Material - Design - Manufacturing processes **MATERIALS AND ITS CHARACTERISTICS:** **Metal alloys** are the workhorses of aircraft structures, chosen for their exceptional strength in both pulling and pushing forces. **Examples OF ALLOYS:** - **Aluminum Alloys:** Widely used in the main fuselage and wing structures due to their strength and weight balance. - **Steel Alloys:** Found in landing gear components for their exceptional strength. - **Titanium Alloys:** Used in applications requiring high temperature performance, like jet fighters and the Concorde. - **Composites**, true to their name, combine multiple materials to create something greater than the sum of its parts **EXAMPLES OF COMPOSITE:** - **Glass Fiber Composites:** Commonly used in wind turbine blades, sailplanes, and pressure vessels due to their good balance of strength and weight. - **Carbon Fiber Composites:** Popular in automotive and aerospace structures for their exceptional stiffness and rigidity. - **Aramid and Kevlar Composites:** Used in bulletproof vests, cockpit doors, and other applications requiring heat and flame resistance. - **Fiber Metal Laminates (FMLs):** A specific type of composite designed for high strength and fracture toughness