AA5052铝合金管件电液成形数值模拟与试验验证

目的 建立AA5052铝合金管件电液成形数值模型,分析其成形过程.方法 应用Johnson-Cook本构方程,基于LS-DYNA平台对成形过程进行数值模拟分析,然后开展工艺试验,验证数值模拟模型的可靠性.结果 在管件电液自由胀形过程中,冲击波波阵面波头压力最高,管壁所受冲击波传递压力的分布关于金属丝几何中心始终是对称的...

Numerical Simulation and Experimental Verification of Electrohydraulic Forming for AA5052 Aluminum Pipe Parts

The paper aims to establish the numerical model of electrohydraulic forming of AA5052 aluminum alloy pipe parts and analyze its forming process. The Johnson-Cook constitutive equation was used to simulate the electro-hydraulic forming process of AA5052 aluminum alloy pipe parts based on the LS-DYNA platform. Then process tests were carried out to verify the reliability of the numerical simulation model. During the process of free bulging of the pipe, the shock wave front had the highest pressure, and the distribution of the shock wave pressure on the pipe wall was always symmetrical about the geometric center of the wire. The numerical simulation results of sample deformation profile were in good agreement with the experimental results. In the comparison of the results of experiments and simulations, the maximum relative error of radial displacement was 5.52%. The relative error of axial shrinkage rate was 2.53%. The maximum relative error of wall thickness was 3.36%. The numerical simulation model established in this paper was reliable and could be used to analyze the forming process.