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首页> 外文期刊>Materials Science and Engineering >A new finite element model for multi-cycle accumulative roll-bonding process and experiment verification
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A new finite element model for multi-cycle accumulative roll-bonding process and experiment verification

机译：新的多周期累积轧制过程有限元模型及实验验证

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摘要

The modelling of multi-cycle accumulative roll-bonding (ARB) is challenging due to the repetitive cutting, stacking and roll-bonding. In this study, a finite element model was proposed and by which the real ARB process was successfully simulated for 5 cycles for the first time. Mapping solution, a remeshing analysis technique, was adopted to transfer the deformation solution from the deformed mesh to a new mesh between cycles, which not only enabled the simulation of discontinuous processes, but also alleviated the mesh distortion. Moreover, with this technique, tensile tests of ARB processed materials were also simulated. The predictions have been validated by the corresponding experimental observations. The deformation behaviours, in terms of texture, hardness, tensile strength and fracture, and plasticity instability were studied. The evolution of shear strain explained the heterogeneity and transition of textures. The distribution of hardness was in the same pattern as equivalent plastic strain through the thickness at first and then it tended to be uniform due to microstructural saturation. The investigation of tensile fracture and plastic instability showed that their occurrence was related to the difference in strength between the two components of composites.
机译：由于重复的切割，堆叠和辊压粘合，多周期累积辊压粘合（ARB）的建模具有挑战性。在这项研究中，提出了一个有限元模型，并通过该模型首次成功地模拟了5个循环的真实ARB过程。映射解决方案是一种网格分析技术，用于在周期之间将变形解从变形的网格转移到新的网格，这不仅使模拟不连续过程成为可能，而且减轻了网格变形。此外，利用这种技术，还模拟了ARB处理材料的拉伸试验。这些预测已通过相应的实验观察得到了验证。从质地，硬度，拉伸强度和断裂以及塑性不稳定性方面研究了变形行为。剪切应变的演变解释了纹理的异质性和过渡。首先，硬度的分布与通过厚度的等效塑性应变相同，然后由于微观结构饱和而趋于均匀。对拉伸断裂和塑性不稳定性的研究表明，它们的出现与复合材料两种组分之间的强度差异有关。

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