作者：Jie; MENG; Feng; CHEN; You-qing; DINGconstitutivemodelstraingradientplasticityaisi4340microsidecutting
摘要：This paper presented a 2D finite element model of AISI 4340 for micro side cutting. Johnson-Cook con-stitutive model and Johnson-Cook shear failure model are combined to simulate a complete side cutting cycle forone flute rotation. The flow stress which is calculated from Johnson-Cook constitutive model is smaller if the sizeeffect is neglected. Therefore, the strain gradient plasticity model is developed. The chip formation, von Misesstress and temperature fields are predicted. Compare to the Johnson-Cook constitutive model, simulation resultsshow that size effect exists in the micro side cutting process and the strain gradient plasticity model can describe itwell. Finally, the flow stress from the finite element simulation is compared with theoretical calculation results,which is validated the correctness of finite element model.
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