The landing gear, which can also be called the undercarriage, is a complex system of structural parts, hydraulics, energy absorption components, brakes, wheels and tyres. Of the different components, the structural members are the parts that support the heavy landing loads and keep the gear from collapsing under the weight of the aircraft.
The materials used for landing gear require high static strength, to support take-off and landing, good fracture toughness and fatigue strength.
The most commonly used materials for landing gear are high-strength steel and titanium alloy.
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