Papers by Keyword: C/E Composite

Abstract: The abrasive drilling achieves high hole qualities in processing carbon/epoxy (C/E) composites. In order to investigate the cutting force and the material removal mechanism for drilling C/E composites with abrasive drilling tool, this paper presented a mechanistic model to predict the cutting force of single grain. The model assumes fibers as a beam with two ends fixed. The beam is subjected to extrusion of diamond grain and mainly fractures by tensile damage. The failure mode is then validated by finite element simulation and scratching experiment. The cutting simulation of single grain using Abaqus showed fracture occurred in the points with maximum tensile stress. The tensile damage results in many claval chips. Local fiber tensile damage is the mainly failure mechanism for the fibers, accompanying the fiber compressive failure and shear failure.

Abstract: Aiming at solving the problems of wheel loading in dry grinding of Carbon/Epoxy composite materials, a novel electroplated grinding wheel with controlled abrasive cluster was developed, in which the diameter of clusters is in Φ0.2 mm to Φ1.0 mm and the interspace between them is about 0.5 mm to 1.0 mm. A conventional electroplated grinding wheel with abrasive grains distributed randomly was fabricated in the same way. The comparison experiments involving C/E composite were conducted on a vertical spindle grinder with the novel and conventional grinding wheels. The results show that the grinding forces of novel wheel developed is more lower though little larger surface roughness, and the wheel loading phenomenon is markedly decreased compared with conventional electroplated wheel.