An analytic model based on ANSYS/LS-DYNA has been developed on the cold rolling process for Q235 steel rebar with 12 mm in diameter.The elastic-plastic finite element method(FEM)and the cold deformation resistance mod...An analytic model based on ANSYS/LS-DYNA has been developed on the cold rolling process for Q235 steel rebar with 12 mm in diameter.The elastic-plastic finite element method(FEM)and the cold deformation resistance model of Q235 steel were adopted in this model.Deformation uniformity of the final product has been analyzed using this model.The results indicate that the uniformity of the final product is obtained only as the centerline of the bending rolls is vertical to the centerline of the driven roll and parallel to the centerline of the drive roll in the whole rolling process.Besides,the number of the bending rolls must even realize the continuous bending and reverse bending process.Also,the number of the bending rolls must match the deformation degree of the workpiece in the cold rolling process.The validity of this finite element model was verified by the size and distribution of grains from the billet to the rebar in a practical cold rolling process.展开更多
A finite element model for coupled thermo-meehanical analysis has been developed in hot continuous rolling process for Inconel 718 alloy round rod with diameter of 45 mm. The stability of this alloy is discussed by in...A finite element model for coupled thermo-meehanical analysis has been developed in hot continuous rolling process for Inconel 718 alloy round rod with diameter of 45 mm. The stability of this alloy is discussed by integration of FEM and processing map reported in literatures. The result shows that the stability of Inconel 718 alloy is analyzed effectively during that process and good stability appears as the initial temperature is 960 ℃ and the initial velocity is from 0. 15 to 0.45 m · s^-1 or the initial temperature is 980 ℃ and the initial velocity is from 0. 15 to 0. 25 m · s^-1.展开更多
基金Item Sponsored by Financial Supports From National Pillar Program of China(2007DAE30B02)
文摘An analytic model based on ANSYS/LS-DYNA has been developed on the cold rolling process for Q235 steel rebar with 12 mm in diameter.The elastic-plastic finite element method(FEM)and the cold deformation resistance model of Q235 steel were adopted in this model.Deformation uniformity of the final product has been analyzed using this model.The results indicate that the uniformity of the final product is obtained only as the centerline of the bending rolls is vertical to the centerline of the driven roll and parallel to the centerline of the drive roll in the whole rolling process.Besides,the number of the bending rolls must even realize the continuous bending and reverse bending process.Also,the number of the bending rolls must match the deformation degree of the workpiece in the cold rolling process.The validity of this finite element model was verified by the size and distribution of grains from the billet to the rebar in a practical cold rolling process.
基金Sponsored by National Natural Science Foundation of China(50634030)the Program of Education Ministry for New Century Excellent Talents in University(NECT-06-0285)
文摘A finite element model for coupled thermo-meehanical analysis has been developed in hot continuous rolling process for Inconel 718 alloy round rod with diameter of 45 mm. The stability of this alloy is discussed by integration of FEM and processing map reported in literatures. The result shows that the stability of Inconel 718 alloy is analyzed effectively during that process and good stability appears as the initial temperature is 960 ℃ and the initial velocity is from 0. 15 to 0.45 m · s^-1 or the initial temperature is 980 ℃ and the initial velocity is from 0. 15 to 0. 25 m · s^-1.
