孔冷挤压有限元仿真中的铰削分界面位置确定方法

doi:10.7527/S1000-6893.2018.22674

Abstract

Abstract: The finite element simulation of split sleeve cold expansion process is the prerequisite for obtaining residual stress distribution and predicting fatigue life. In the finite element modeling stage, setting reaming interface between the reaming element layer and the matrix element is the key to simulate the reaming process of final hole. Through elastic-plastic mechanical analysis of cold expansion, a two-dimension residual stress and strain analysis method for mandrel, split sleeve and plate is established. Based on the radial displacement of micro-elements at different positions, a relative position calculation model of the reaming interface is established. Sensitivity analysis of key parameters is carried out to quantitatively study the influence of key parameters on residual stress distribution and radial displacement. For the finite element modeling of hole cold expansion process, this study provides a convenient and reliable method for determining the relative position of reaming interface between the reaming element layer and the matrix element.

Key words: cold expansion, split sleeve, elastic-plastic analysis, residual stress, reaming interface

CLC Number:

V215

DU Xu, ZHANG Teng, HE Yuting, ZHANG Tianyu, ZHANG Sheng, FENG Yu. Determining position of reaming interface in cold expansion FEM simulation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(4): 422674-422674.

References

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Determining position of reaming interface in cold expansion FEM simulation

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