Effects Of Cutting Parameters On Acoustic Emission Signal Response During Drilling Of Laminated Composites Using Factorial Design Method

Abstract

Factorial design has been used to study the effect of cutting parameters on acoustic emission signal response during the drilling of composite laminates. Experimental design is a strategy of planning, conducting, analyzing and interpreting experiments so that sound and valid conclusion can be drawn efficiently, and economically. In this study, effects of cutting speed, feed rate and tool diameter on the acoustic emission signal response are investigated using acoustic emission's energy, amplitude, root mean square and frequency responses and 2 3 factorial design for drilling operation. Cutting tests were performed under dry conditions. Calculated effects, standard errors at 95% confidence level, and models governing the acoustic emission response to the cutting conditions have been generated from the acoustic emission signal responses. The results revealed that, acoustic energy response has significant effects due to the cutting parameters. Hence a model can be established to relate the acoustic emission's energy response and the cutting parameters, and as a result monitor and control the area of delamination during the drilling process.

Development of a Control Strategy for Monitoring the Delaminating Damage in Drilling Of Carbon Composite Laminates

“…It was found out that the energy response has the highest significant effects due to the cutting parameters. Hence a model can then be established to relate the acoustic emission energy response and the cutting parameters which can be used to monitor and control the area of delamination during the drilling process (Andoh et al, 2007) This research seeks to develop a technique to control inter-ply delaminations during the drilling of laminated composites with the use of acoustic emission signals. A specific objective of this research is to develop a mathematical model relating acoustic energy and cutting parameters that can be used to monitor changes in the delamination area during the drilling action.…”