共查询到18条相似文献,搜索用时 140 毫秒
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低碳结构钢中厚板MAS轧制过程有限元模拟 总被引:1,自引:1,他引:0
根据低碳结构钢Q235(C≤0.20%)4300 mm中厚板现场轧制工艺,采用有限元软件ABAQUS/Explicit建立弹塑性有限元模型对展宽比1.70、精轧伸长率7.87的中厚板普通轧制过程和MAS(水岛平面形状控制轧制法)轧制过程分别进行了模拟计算,对不同变形阶段进行了对比分析。结果表明,MAS轧制法能明显改善中厚板轧后平面形状,其形状的改变量与MAS轧制段设置参数直接相关,对比不同参数下MAS轧制结果得出MAS轧制最优参数△L×△h为300×3。 相似文献
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本文介绍中厚板轧制过程中有限元理论的运用,通过MARC软件对中厚板轧制过程中塑性变形有限元分析模型的建立和边界条件的确定进行了详细的阐述,比较真实地反映轧制过程中塑性变形规律,对实际生产起到很好的指导作用。 相似文献
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本文基于大变形弹塑性原理,采用隐式静态有限元法分析了压下量和轧制温度对高强度钢Q500D板材热轧应变分布的影响,得到了在不同压下量和轧制温度下塑性应变的分布规律,并将计算结果与实际热轧试验所得的数据进行了比较,相当吻合,证明此种模拟方法对于制定轧制工艺具有一定的指导意义。 相似文献
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According to the rolling features of plate mill, a 3D elastic-plastic FEM(finite element model) based on full restart method of ANSYS/LS-DYNA was established to study the inhomogeneous plastic deformation of multi-pass plate rolling. By analyzing the simulation results, the difference of head and tail ends predictive models was found and modified. According to the numerical simulation results of 120 different kinds of conditions, precision plate plan view pattern predictive model was established. Based on these models, the sizing MAS (mizushima automatic plan view pattern control system) method was designed and used on a 2800 mm plate mill. Comparing the rolled plates with and without PVPP (plan view pattern predictive) model, the reduced width deviation indicates that the plate plan view pattern predictive model is precise. 相似文献
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板厚对冷弯成型过程及回弹影响的有限元模拟 总被引:1,自引:0,他引:1
采用ANSYS/LS-DYNA有限元软件的显式求解功能对厚度分别为4mm、5mm、6mm、7mm、8mm的板料进行有限元弹塑性分析,得到板料成型过程中厚度因素对轧件应力、应变的影响规律。接着利用ANSYS的隐式求解功能分析厚度因素对板料回弹的影响规律,并将回弹量的模拟数值与工作现场的回弹数值进行比较,表明计算结果具有一定的可信度。 相似文献
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Using three-dimensional rigid-viscoplastic finite element method (FEM), a coupling multivariable numerical simulation model for steel plate rolling has been established based on the physical metallurgy microstructural evolution rule and experiential equations. The effects of reduction, deformation temperature, and rolling speed on the deformation parameters and microstructure in plate rolling were investigated using the model. After a typical rolling process of steel plate 16Mn is simulated, the strain, temperature, and microstructure distributions are presented, as well as the ferrite grain transformation during the period of cooling. By comparing the calculated ferrite grain sizes with measured ones, the model is validated. 相似文献
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An integrated mathematical model is proposed to predict the velocity field and strain distribution during multi-pass plate hot rolling. This model is a part of the mixed analytical-numerical method (ANM) aiming at prediction of deformation variables, temperature and microstructure evolution for plate hot rolling. First a velocity field with undetermined coefficients is developed according to the principle of volume constancy and characteristics of metal flow during rolling, and then it is solved by minimizing the total energy consumption rate. Meanwhile a thermal model coupling with the plastic deformation is exploited through series function solution to determine temperature distribution and calculate the flow stress. After that, strain rate field is calculated through geometric equations and strain field is derived by means of difference method. This model is employed in simulation of an industrial seven-pass plate hot rolling process. The velocity field result and strain field result are in good agreement with that from FEM simulation. Furthermore, the rolling force and temperature agree well with the measured ones. The comparisons verify the validity of the presented method. The calculation of temperature, strain and strain rate are helpful in predicting microstructure. Above all, the greatest advantage of the presented method is the high efficiency, it only takes 12 s to simulate a seven-pass schedule, so it is more efficient than other numerical methods such as FEM. 相似文献