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通过热压缩物理模拟试验得到7075铝合金的真应力-真应变数据,将其输入到Deform-2D软件中,作为材料模型,选择Cockroft&Latham模型及剪切摩擦模型,设置温度300℃,压下量60%,应变速率为0.01、0.1、1、10 s-1,摩擦系数为0.1、0.2、0.3、0.5、0.7,对试样压缩过程中的最大损伤值进行模拟。模拟分析得到了在一定条件下,7075铝合金热压缩过程中最大损伤值随压下量、摩擦系数及应变速率的变化规律。
The true stress-strain data of 7075 aluminum alloy were obtained by thermal-compression physical simulation and imported into Deform-2D software. The material model was Cockroft & Latham model and shear friction model. The temperature and pressure were set at 300 ℃ and 60 %, The strain rate is 0.01,0.1,1,10 s-1, the friction coefficient is 0.1,0.2,0.3,0.5,0.7, the maximum damage value of the sample during compression is simulated. Under certain conditions, the variation of the maximum damage value with the reduction of the friction coefficient and the strain rate of the 7075 aluminum alloy during hot compression was obtained through simulation analysis.