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首页> 外文期刊>Computational Materials Science >3D coupled thermo-mechanical FE modeling of blank size effects on the uniformity of strain and temperature distributions during hot rolling of titanium alloy large rings
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3D coupled thermo-mechanical FE modeling of blank size effects on the uniformity of strain and temperature distributions during hot rolling of titanium alloy large rings

机译：坯料尺寸对钛合金大环坯热轧过程中应变和温度分布均匀性的3D耦合热机械有限元建模

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In hot rolling of a titanium alloy large ring (TLR), blank sizes have a considerable effect on the geometric shape of the deformation zone (GSDZ) which is closely related to the uniformity of strain and temperature distributions (STD) in the TLR. In the study, an analytical description of the GSDZ is presented and then a reliable 3D coupled thermo-mechanical FE model of the process is developed based on ABAQUS/Explicit. Size effects of rectangular-section blanks on the uniformity of STD in TLRs are explored from the GSDZ point of view using dynamic explicit FE simulation. The results obtained show that: (1) The GSDZ can be described by the average shape parameter (G) over bar and the average distribution ratio of feed amount (y) over bar. (2) Under the plastic stability condition, decreasing the blank thickness h(0) or increasing the average blank radius R-a0 leads to more uniform STD, while the blank axial height b(0) has a negligible effect on the uniformity of STD. Moreover, there exist differences between effects of the two means for changing h(0) (i.e. change the blank outer radius R-0 or change the blank inner radius r(0)). (3) R-0 has predominant effect on the uniformity of STD, followed by r(0), R-a0 and b(0) in turn. (C) 2008 Elsevier B.V. All rights reserved.
机译：在钛合金大环（TLR）的热轧中，毛坯尺寸对变形区（GSDZ）的几何形状有相当大的影响，这与TLR中的应变和温度分布（STD）的均匀性密切相关。在研究中，给出了GSDZ的解析描述，然后基于ABAQUS / Explicit开发了可靠的3D耦合热机械有限元模型。使用动态显式有限元仿真从GSDZ的角度探讨了矩形截面毛坯对TLR中STD均匀性的尺寸影响。获得的结果表明：（1）GSDZ可以用棒上的平均形状参数（G）和棒上的进料量（y）的平均分布比来描述。 （2）在塑性稳定性条件下，减小毛坯厚度h（0）或增加平均毛坯半径R-a0可使STD更加均匀，而毛坯轴向高度b（0）对STD的均匀性的影响可忽略不计。而且，在改变h（0）的两种方法的效果之间存在差异（即，改变毛坯外半径R-0或改变毛坯内半径r（0））。 （3）R-0对性病的均匀性起主要作用，其后依次是r（0），R-a0和b（0）。 （C）2008 Elsevier B.V.保留所有权利。

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