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http://hdl.handle.net/11375/19091
Title: | CALIBRATION OF THE JOHNSON-COOK FAILURE PARAMETERS AS THE CHIP SEPARATION CRITERION IN THE MODELLING OF THE ORTHOGONAL METAL CUTTING PROCESS |
Authors: | Wang, Keyan |
Advisor: | Ng, Eu-Gene |
Department: | Mechanical Engineering |
Keywords: | Calibration methods;Johnson-Cook fracture parameters |
Publication Date: | 2016 |
Abstract: | The finite element analysis (FEA) is a numerical method widely used to predict the metal-cutting performance in both academic and industrial studies, avoiding the high expense and time consumption of experimental methods. The problem is how to calibrate reliable fracture-parameters as chip-separation criterion are implemented into FEA modelling. This thesis introduces a calibration method of the Johnson-Cook fracture parameters used in the orthogonal metal cutting modelling with a positive rake angle for AISI 1045 steel. These fracture parameters were obtained based on a set of quasi-static tensile tests, with smooth and pre-notched round bars at room temperature and elevated temperatures. The fracture parameters were validated by low- and high-strain rate simulations corresponding to tensile tests and orthogonal metal-cutting processes respectively in ABAQUS/Explicit. Compared to literature calibration methods, this method is simpler, less expensive but valid. |
URI: | http://hdl.handle.net/11375/19091 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Wang_Keyan_2016April_Master's of Applied Science.pdf | Main article | 4.36 MB | Adobe PDF | View/Open |
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