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

Ismail, Muhammad Haziq (2016) Experimental Investigation Of Rear Sprocket Failure Of A Fixed Bicycle Using Acoustic Emission And Vibration Analysis. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Experimental Investigation Of Rear Sprocket Failure Of A Fixed Bicycle Using Acoustic Emission And Vibration Analysis.pdf - Submitted Version Download (810kB)

Abstract

Vibration is unwanted effect. Highly vibration can make bicycle’s user not comfort and harms the bicycle component. In order to satisfy the user comforts and safety, research about noise, vibration and harshness (NVH) is very important. Vibration can occur on all part of bicycle and one of it is rear sprocket. Due to repeated cyclic stress at long period of time, rear sprocket has potential to fail or breakdown. Therefore, new diagnostic method to detecting the failure of sprocket is needed. This paper develops the use of acoustic emission (AE) and vibration analysis as a diagnostic tool to analyze the occurrence of failure of rear sprocket. Several rear sprockets with different sizes in normal conditions and defect were provided as samples on the same rotation speed. Both vibration and AE test is conducted simultaneously by using GUNT PT 500.04 and SO Analyzer. Vibration test was measure the level of vibration that produced from the rotation of sample while acoustic emission test measure the sound that emits from vibration of sample. Based on experimental investigation, the sound pressure level (SPL) of AE and the amplitude of vibration spectrum clearly shows that defect sample is higher than normal sample. These results prove that the combination of AE and vibration analysis tools is sufficiently effective in detecting and predicting failure sprocket gear at an early stage.

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