Two of the main stresses that aircraft fasteners are subjected to are strain and _________.

Aircraft fasteners are critical components that hold various parts of the aircraft together under various loading conditions. Among the main stresses that these fasteners may experience, shear stress is particularly significant. Shear occurs when forces are applied parallel or tangential to the surface of a fastener, attempting to slide one part past another.

In aviation, fasteners must be designed to withstand these shear forces during operation, especially during maneuvers and dynamic loads that affect the structure of the aircraft. The ability to resist shear failure is vital for maintaining the integrity and safety of the aircraft during flight, as fasteners are subjected to vibrations, changes in pressure, and thermal variations that can induce shear stresses.

Therefore, recognizing shear as one of the main stresses alongside strain is essential for understanding the performance and reliability of fasteners in aerospace applications. This knowledge is critical for those engaged in aircraft maintenance, repair, and design to ensure that these fasteners are adequately specified and installed to withstand the operational demands placed upon them.