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- W2355841562 abstract "Objective This study mainly focused on the characteristics of cone- shaped necking process under warm or hot conditions of the thick- walled tubes at both ends,and the impact of different process parameters on the wall thickening. Methods Through choosing reasonable temperature field simulation parameters such as material model and thermomechanical coupling,etc,a finite element model was built. Based on the DEFORM bulk forming software,the simultaneous warm- hot necking process at both ends of the thick- walled tubes was analyzed,and study was carried out on the strain-stress distribution characteristics under warm or hot conditions. Results The influence curves for the impact of factors such as tube necking coefficient,half cone angle of mold,t /d0 value,friction factor and forming temperature on wall thickening amount were obtained from simulation experiments under warm or hot conditions. Conclusion Tube necking process had typical deformation phases,including cone bending stage,anti- bending stage and stable necking stage. The characteristics of tube necking deformation under hot conditions were circumferential,axial compression deformation and radial thick-ening deformation. With the increase of cone angle of mold,and the decrease of necking coefficient,the thickening amount of thick- walled tubes increased,besides,the thickening amount was influenced by friction factor,mold temperature and wall thickness of the pipe. The research results provided basic technical data for the thickening of the wall thickness of the tube necking process." @default.
- W2355841562 created "2016-06-24" @default.
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- W2355841562 date "2014-01-01" @default.
- W2355841562 modified "2023-09-23" @default.
- W2355841562 title "Numerical Modelling Study on Warm- Hot Necking and Wall Thickening of Thick- Walled Tubes" @default.
- W2355841562 hasPublicationYear "2014" @default.
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