Statistical analysis of acoustic emission signals generated during turning of a metal matrix composite
AUTOR(ES)
Mukhopadhyay, C. K., Jayakumar, T., Raj, Baldev, Venugopal, S.
FONTE
Journal of the Brazilian Society of Mechanical Sciences and Engineering
DATA DE PUBLICAÇÃO
2012-06
RESUMO
Acoustic emission technique (AET) has been used to monitor the progress of tool wear during turning of silicon carbide (20 wt.%) dispersed Al alloy metal matrix composite. Acoustic emission (AE) signals generated beyond a specific cutting distance increase abruptly. Statistical analysis based on assumed β distribution of AE energy showed that skewness and kurtosis vary with cutting time. Comparison of these results with bparameter of amplitude distribution of AE hits presented in an earlier investigation has shown that while b-parameter is useful for monitoring tool wear up to 0.4 mm, skewness and kurtosis can better monitor the wear beyond that. Uncertainty measurement of AE energy for different cutting distances was determined as per ISO GUM. The combined uncertainty for the measurement of AE energy lies in the range of 0.38 to 1.69, with higher values for the cutting distance between 213.8 mm and 454.5 mm. Different parameters such as skewness and kurtosis of the statistical distribution, b-parameter of amplitude distribution and uncertainties can be used in a complimentary manner for comprehensive evaluation of tool wear.
Documentos Relacionados
- Acoustic Emission Analysis of Cement Mortar Specimens During Three Point Bending Tests
- Analysis of semi-solid processing for metal matrix composite synthesis using factorial design
- Influence of graphite particles on surface roughness and chip formation studies in turning metal matrix composites
- Investigation of Electromagnetic Radiation Emission during Sheet Metal Incremental Micro Forming
- Low Temperature Sintering of Aluminum-Zircon Metal Matrix Composite Prepared by Spark Plasma Sintering