摩擦系数对5083铝合金热压缩试验变形行为影响的有限元模拟研究

Finite Element Simulation Study on the Effect of Friction Coefficient on the Deformation Behavior of 5083 Aluminum Alloy during Hot Compression Test

摘要: 在热模拟试验机上对5083铝合金进行热压缩试验，并利用有限元分析软件DEFOM-3D研究了不同接触摩擦系数0、0.2、0.4和0.6对5083铝合金在热压缩试验中的试样形态、载荷力、应变速率以及应变分布的影响规律。研究表明：接触摩擦系数对载荷力基本没有影响，但对应变速率和应变的分布影响显著，随着接触摩擦系数的增加，变形不均匀性增大，应变速率和应变量从试样两端面到心部逐渐增大，且接触摩擦系数越大，鼓肚现象越明显。

Abstract: The hot compression of 5083 aluminum alloy was carried out on thermal simulator. The effect of different friction coefficients 0, 0.2, 0.4 and 0.6 on the morphology, loading force, strain rate and strain distribution of 5083 aluminum alloy in thermal compression test was studied using finite element analysis software DEFOM-3D. The study shows that the contact friction coefficient has almost no effect on the load force, but the distribution of the strain rate and strain has a significant influence. With the increase of the contact friction coefficient, the deformation non-uniformity in-creases, the strain rate and the strain amount from both ends of the sample to the heart gradually increase, and the greater the coefficient of contact friction, the more pronounced the bulging phe-nomenon.