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Bekir Sami Yilbas,Syed Sohail Akhtar,Omer Keles,Kurtulus Boran 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.8
Laser cutting of a triangular geometry into aluminum 2024 alloy is carried out. Thermal stress field in the cutting section is predictedusing the finite element code ABAQUS. Surface temperature predictions are validated through the thermocouple data. Morphologicalchanges in the cut section are examined incorporating optical and electron scanning microscopes. The effects of the size of the triangulargeometry on thermal stress field are also examined. It is found that surface temperature predictions agree well with thermocouple data. von Mises stress remains high in the region close to the corners of the triangular geometry, which is more pronounced for the small sizetriangle. This behavior is associated with the occurrence of the high cooling rates in this region. Laser cut edges are free from large scalesideways burning and large size burr attachments. However, some locally scattered dross attachments are observed at the kerf exit.