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基于ABAQUS有限元软件平台建立5B02铝合金管件90°推弯成形有限元模型,并进行成形过程的有限元模拟。将模拟结果与实验结果进行对比,结果表明,两者形貌、弯曲部位壁厚分布一致,验证有限元模拟的可信性。通过分析不同成形阶段弯曲内侧与外侧的金属流动与应变场,揭示出5B02铝合金管件90°推弯成形后壁厚分布不均匀的机理。利用模拟方法对比研究内压大小(填料的弹性模量)对壁厚分布的影响,找出了有益于壁厚均匀分布的工艺条件,为实际生产中5B02铝合金管件经90°推弯工艺后壁厚均匀性的控制提供理论依据。
Based on the ABAQUS finite element software platform, a finite element model of 90 ° bending forming of 5B02 aluminum alloy pipe was established, and the finite element simulation of the forming process was carried out. The simulation results are compared with the experimental results. The results show that the wall thickness distribution of both the topography and the bend is consistent, and the credibility of the FEM simulation is verified. By analyzing the metal flow and strain field in the medial and lateral bending of the different forming stages, the mechanism of uneven wall thickness distribution after the bending of the 5B02 aluminum alloy tube by 90 ° is revealed. The effects of internal pressure (elastic modulus of filler) on the distribution of wall thickness were compared by simulation method, and the process conditions that were beneficial to the uniform distribution of wall thickness were found out. For the actual production of 5B02 aluminum alloy tube after 90 ° bending process Wall thickness uniformity control provides a theoretical basis.