2A12铝合金高温拉伸热力耦合仿真模拟

Simulation of high-temperature tensile thermo-mechanical coupling of 2A12 aluminum alloy

采用实验与仿真的方法,先将试样加热到490℃保温50 min,取出立即进行水冷,获得固溶态2A12铝合金,设置320~380℃三组不同实验温度和0.18~9 s-1四种不同拉伸速度进行拉伸,研究2A12铝合金加热到不同温度以不同拉伸速度进行拉伸对力学性能的影响。实验结果显示,相同温度下应力随着拉伸速率的升高而升高,而相同拉伸速率下应力随着温度的升高而降低。在ABAQUS/Explicit平台开展仿真研究,绘制拉伸试样模型,把实验数据分别导入模型中,设置热变形和损伤模型等相关参数,导出的仿真结果与实验结果吻合较好,表明所建立的热力耦合仿真模型能较好模拟2A12铝合金的单轴拉伸行为。

In this study,the sample was heated to 490℃for 50 minutes,then the sample was immediately taken out and cooled in water to obtain 2A12 aluminum alloy in solid solution state.The obtained 2A12 aluminum alloy was stretched at different temperatures at different stretching speeds,and the effect of temperature and stretching speed on the mechanical properties of 2A12 aluminum alloy was studied.The experimental results showed that the stress increased with the increase of the stretching speed at the same temperature,while the stress decreased with the increase of the temperature at the same stretching speed.The simulation research was carried out on the ABAQUS/Explicit platform.The tensile sample model was drawn,the experimental data were imported into the model,and the relevant parameters such as thermal deformation and damage models were set.The simulation results were consistent with the experimental results,indicating that the established model could simulate the uniaxial tensile of 2A12 aluminum alloy.