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FATIGUE LIFE PREDICTION OF BRACKET USED AN AIRBUS SUSPENSION SYSTEM UNDER VARYING LOAD CONDITIONS
  • S Thillikkani,
  • M Nataraj,
  • M Francis Luther King
S Thillikkani
JCT College of Engineering and Technology
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M Francis Luther King
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Abstract

Suspension bracket mounted on a cross-section part and subjected to uneven loads fail often due to fatigue cracks and self vibration. It is important to consider and evaluate the key aspects of fatigue failure mode and fatigue life by using Finite Element Analysis (FEA) techniques to overcome these failures. This paper aims at investigating the premature failure of the bracket with generalized force elements in dynamic load conditions for the existing and proposed bracket model. Variations in the material specification are seen in chemical and micro-structural measurement. By using the Scanning Electron Microscope (SEM) Fractography test, the failure bracket indicates that the cyclic load in the air suspension system is caused by road-induced vibrations and road bumps. This contributes to the increase of the fatigue fracture, which ends up with a bracket failure. The bracket model has been optimized for the safe load conditions of the commercial airbus suspension system. FEA is the root cause of the evaluation system for the safe stress value of a proposed model, which calculates the corresponding life cycle value