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Effect of tool point angle on thrust force and acoustic emission in drilling of quasi-isotropic-woven CFRP

Effect of tool point angle on thrust force and acoustic emission in drilling of quasi-isotropic-woven CFRP

Date15th Oct 2020

Time02:30 PM

Venue Google Meet (https://meet.google.com/sax-forv-iit​)

PAST EVENT

Details

Carbon fiber reinforced polymer (CFRP) composites emerge in all the structural application to improve the strength with less weight. As part of jointing the structural components in the assembly line, the drilling process is unavoidable. Drilling holes on the CFRP composite are critical due to its heterotopic and brittle natures. Therefore, drilling induced damages restrict these materials to use in many applications. These damages mainly occur due to improper selection of drill geometry. It can be short out by study and selecting proper drill tool geometry with optimized machining conditions for CFRP drilling. With this motivation, the drill tools with three different point angles were chosen to study their influence in the drilling of CFRP material. The work is also attempted by using acoustic emission (AE) signals to understand the dynamics of the drilling process and their corresponding damages occurred during drilling. The AE frequencies of damages such as matrix cracking, fiber pull-out, debonding and fiber fracture are analysed for all the three drill tools at various drilling conditions. The thrust and torque results are also used to understand the effects of cutting edges in CFRP drilling

Speakers

Mr. Rishikesan V, ME14D125

Department of Mechanical Engineering