Investigation of displacement fields in an abrasive waterjet drilling process: Part 1. Experimental measurements

The transient state of displacement fields in the machining zone of a targe t material during abrasive waterjet impinging and drilling was investigated . A moire interferometry experimental setup for recording displacement fiel ds and a dynamometer for measuring the reaction force were developed. Whole fields of surface displacement fields and the reaction force of the cerami c and polycarbonate target materials were successfully recorded when the sp ecimen was being pierced by high-pressure abrasive waterjet (AWJ). This pap er demonstrates that both u and v displacement fields of a workpiece during AWJ drilling can be recorded in real time and simultaneously by the moire interferometry experimentation. The measured surface displacement distribut ions and the machining forces will be used to drive a finite element model in the second part of this investigation, in which the authors study the st ress and strain state for the target material associated with the jet-mater ials interaction during the jet penetration process.