Study on forming defects in the rolling process of large aluminum alloy ring via adaptive controlled simulation
Study on forming defects in the rolling process of large aluminum alloy ring via adaptive controlled simulation
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DOI：
10.1007/s00170-010-3023-6
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
J. Zhou;Feng Wang;Menghan Wang;Wujiao Xu
中科院分区：
文献类型：
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作者：
J. Zhou;Feng Wang;Menghan Wang;Wujiao Xu
根据环件径轴向轧制过程中等效塑性应变的分布特点，建立了环件径轴向轧制截面上的塑性变形区。采用ABAQUS软件建立了环件轧制过程中的三维刚粘塑性有限元模型，并对其进行了自适应控制。分析了不同变形区的PEEQ、应力和温度分布。应变峰值出现在截面角部。此外，它被调查，不均匀的应变，应力和温度分布在环往往会导致不均匀的组织和性能。因此，高应变变形会在截面角部产生成形缺陷和组织损伤。基于新开发的环件径轴向轧制过程有限元模型和综合数值模拟方法，采用三维热力耦合有限元模拟方法，研究了进给速度和润滑条件对环件应变和温度分布及其均匀性的尺寸效应。计算结果与实验结果吻合较好。本研究成果可为质量控制和技术指导提供依据。
According to the distribution characteristics of equivalent plastic strain (PEEQ) in radial–axial ring rolling, the plastic deformation zones in cross section were established. A 3D rigid-viscoplastic finite element model (FEM) which was controlled adaptively was applied to investigate defects that occurred during ring rolling under ABAQUS software. PEEQ, stress, and temperature distributions in different deformation zones have been analyzed in this study. Strain peaks were found in the cross-section corners. Moreover, it was investigated that non-uniform strain, stress, and temperature distributions in the ring tend to cause non-uniform microstructure and properties. Therefore, forming defects and microstructure damage would appear in cross-section corners due to the high-strain deformation. Based on the new developed FEM of the radial–axial ring-rolling process and comprehensive numerical simulations, the size effects of feed rate and lubrication conditions on strain and temperature distributions and their uniformity were investigated by 3D coupled thermomechanical FE simulation. The results have good agreement with experiment. The achievements of this study can provide basis for quality control and technical guidance.