Design Fabrication and Reliability Analysis on Scaled Modeled Aircraft Rigid Type Nose Wheel Landing Gear

Reliability is defined as the ability of a component to perform its intended function for a specified time.For an aircraft, reliability is the probability that the aircraft as a whole, or a flight.The material capacity associated with the progressive "damage" mechanism, i.e., residual strength or critical crack size, fracture toughness.Landing gear is the most important structure of an aircraft, as it is solely responsible for the aircraft to do all the ground operations from taxing to take-off and landing, but it was found that landing gear creates a massive drag when the aircraft is in air.So, in order to reduce the drag and increase the efficiency of aircraft, landing gear is retracted when the aircraft is in air and extended just before reaching ground.The overall strength of an aircraft structure will depend on the individual strengths of the components that make up the structure.The strength of one component can be different to the strength of another component with the same design and manufactured from the same materials.This difference may result from manufacturing variations or the reduction in the strength of the component because of fatigue and cyclic loads.Because of these differences, there will always be some variability in the failure times of components of the same design.This work allows us to determine the life span of a scale modeled aircraft landing gear for a series of scheduled Landings.And also to Draw Bath-Tub curve for the design, fabricated and tested model to verify the failure rate with respect to time.This analysis also gives scope to conduct load test on scale modelled aircraft landing gear for sequence of loadings to attain statistical data related to cumulative no of failures, failure density, and failure rate in turn (reliability) life span of such a landing gear.This statistical result then validated with computationally predicted results using commercial software ANSYS.