Aircraft structures refer to the physical components that make up an aircraft, providing support and shape. These structures include the fuselage, wings, tail, and landing gear, all designed to withstand various forces during flight. The materials used, such as aluminum and composite materials, are chosen for their strength-to-weight ratio, ensuring the aircraft is both lightweight and durable. The design of aircraft structures is crucial for safety and performance. Engineers use advanced techniques to analyze stress and aerodynamics, ensuring that each part can handle the pressures of flight. Proper maintenance of these structures is essential for the longevity and reliability of the aircraft, contributing to overall aviation safety.