Literature Survey on Advanced Aircraft Materials Essay

Literature Survey on Advanced Aircraft Materials - Essay ExampleThe latter showed that the causes of the accident were metal play out. Experts find multiple fatigue cracks in aircraft structure /Fildey, 1990/.Numerous site fatigue damage, which resulted in structural failure, were detected in the process of investigation. The investigation, conducted by the National transit Safety Board explained the accident by the inability of the operators maintenance program to detect corrosion damage /Miller, 1990 /.One of the possible interpretations of the problem was the function of dampen joints to bond large panels of skin to one another. These lap points used to run longitudinally along the fuselage. It was supposed that there should be no problem of fatigue cracking due to the strong connection among the overlapping panels. Similar aircraft, which underwent thorough inspection, also showed disbonding, corrosion and cracking problems in the lap joints /Miller, 1990 /.Faying surfaces we re torn separately in the course of the pillowing, which happened in the result of corrosion processes combined with the subsequent build-up of voluminous corrosion products inside the lap joints / Komorowski, 1996/.So, the main cause of the Boeing 737 air crush was be structural failure fatigue. This sign pf failure is sometimes called metal fatigue, however, this is not precise as even plastic parts can endure cyclic loading. Cyclic loading of a piece of metal or plastic first of all results in cracks, which further grow and expand. This in its do work leads to fracture /Pizzo, 1995 /.The next problem of main aircraft materials is corrosion, which happens in steel, aluminum and titanium. Except of the gross corrosion, which is particularly common to steel equipment, there also exists another type of corrosion, which is more subtle but not less dangerous /Pizzo, 1995 /.One of the most dangerous parts of corrosion is the one occurring in mated, moving parts. This results in