Assessment of the Exit Defects in Carbon Fibre-Reinforced Plastic Plates Caused by Drilling
نویسندگان
چکیده
This paper investigates the formation of the exit defects in carbon fibre-reinforced plates and characterizes their features in terms of drilling conditions. It was found that spalling and fuzzing are the major mechanisms of exit defects. The spalling, consisting of a main region and a secondary region, is caused by chisel and cutting edge actions, in which the former plays a key role. The fuzzing, however, exists in the cutting region where the included angle between the fibre direction of the surface layer and that of the cutting speed is acute. A severer spalling damage corresponds to a high spindle speed, a large feed rate and a great thrust force. Some empirical relationships, including a dimensionless formula, were developed for assessing the characteristic dimension of the spalling damage based on the known drilling conditions.
منابع مشابه
Carbon-fibre reinforced plates for problem fractures.
We report our experience with carbon-fibre reinforced plastic (CFRP) plates in the management of 19 problem fractures complicated by either infection, nonunion, comminution or contamination. The combination offers secure fixation without inhibition of callus formation.
متن کاملThe use of semi-rigid carbon-fibre-reinforced plastic plates for fixation of human fractures. Results of preliminary trials.
Semi-rigid plates have been constructed from epoxy resin reinforced with carbon fibre. These have been used in animal trials and also for internal fixation of 20 fractures of the human tibia. The results are generally very satisfactory, and support the view that semi-rigid fixation is not only desirable theoretically, but also works in practice. However, the results are from preliminary trials ...
متن کاملDamage Evaluation of Drilled Carbon/epoxy Laminates Based on Area Assessment Methods
The characteristics of carbon fibre reinforced laminates had widened their use, from aerospace to domestic appliances. A common characteristic is the need of drilling for assembly purposes. It is known that a drilling process that reduces the drill thrust force can decrease the risk of delamination. In this work, delamination assessment methods based on radiographic data are compared and correl...
متن کاملTissue reaction and loosening of carbon-reinforced polyethylene arthroplasties.
The use ofcarbon fibre implants in orthopaedics is widely reported, but the potential risks associated with their use are less well defined. In its pure form carbon fibre may be spun into ligament and tendon replacements. Incorporated into epoxy resin, it has been used in plates for the internal fixation of fractures. Carbon fibre has also been used to reinforce polyethylene composites for join...
متن کامل