Experimental Investigation Of Front Sprocket Failure Of Fixed Bicycle Using Acoustic Emission And Vibration Analysis

Ayob, Muhammad Amirul Shafiq (2016) Experimental Investigation Of Front Sprocket Failure Of Fixed Bicycle Using Acoustic Emission And Vibration Analysis. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Experimental Investigation Of Front Sprocket Failure Of Fixed Bicycle Using Acoustic Emission And Vibration Analysis.pdf - Submitted Version Download (423kB)

Abstract

Vibration is a rapid oscillatory motion of an equilibrium point. Most vibrations are undesirable in machines and structures because they produce energy losses, cause added wear, increase bearing loads, create passenger discomfort in riding bicycles and absorb energy from the system. Front sprocket bicycle is one of the important part in bicycle. The moving of the front sprocket will lead to the contact shock with the chain and cause wear. So, in order to overcome this failure we are using new method via acoustic emission instead of vibration analysis. The acoustic emission (AE) is the phenomenon of radiation of acoustic waves in solids that occurs when a material undergoes irreversible changes in its internal structure, for example as a result of crack formation. Difference from vibration analysis, the acoustic emissions provide a direct measure of failure of the front sprocket in action. There are three samples that been used in this test, with sample A, sample B and sample C. The sizes for each sample are 22, 32 and 42 number of teeth respectively. Besides, the two different condition been tested to give more affective result for detecting failure of front sprocket. Basically, the different sizes of the sprockets totally didn't affect the result of the sprocket. At the end, both of the test showed an increment of data in defect condition compare to normal condition. The AE application on slow rate speed give more acceptable result rather than vibration analysis.

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