Optimization of spring-back in creep age forming process of 7075 Al-Alclad alloy using D-optimal design of experiment method
Optimization of spring-back in creep age forming process of 7075 Al-Alclad alloy using D-optimal design of experiment method
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DOI：
10.1016/j.measurement.2016.03.003
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发表时间：
2016-06
期刊：
影响因子：
5.6
通讯作者：
Mohammad Ershadi Khamneh;M. Askari-Paykani;H. Shahverdi;S. Hadavi;M. Emami
中科院分区：
文献类型：
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作者：
Mohammad Ershadi Khamneh;M. Askari-Paykani;H. Shahverdi;S. Hadavi;M. Emami
采用基于试验设计的统计分析方法，对7075铝合金蠕变时效成形过程中的回弹现象进行了建模和预测。选择时间和温度作为确定蠕变时效成形过程回弹的有效变量。实验的d -最优设计方法便于在实验变量域进行统计分析和提取确定回弹的数学模型。采用基于纯弯曲理论的数值计算方法对试件的回弹进行了计算。回弹的方差分析表明，温度是蠕变时效成形过程中最有效的变量。此外，回弹的数学模型和响应面表明，要减小回弹，重要变量应在上层。对7075 Al-Alclad合金蠕变时效成形过程中的回弹性能进行了优化。
This paper attempts to model and predict the spring-back for creep age forming of a 7075 Al-Alclad alloy using statistical analyses based on a design of experiments method. Time and temperature were chosen as effective variables for determining spring-back in the creep age-forming process. The D-optimal design of experiments method facilitated statistical analyses and the extraction of a mathematical model for determining spring-back in the experimental variables domain. The spring-back of the specimens was calculated using a numerical procedure based on the pure bending theory. Analysis of the variances for spring-back showed that temperature was the most effective variable in the creep-age forming process. Additionally, a mathematical model and the response surface of the spring-back showed that to decrease spring-back, the significant variables should be in the upper level. The spring-back in the creep age-forming process was optimized for a 7075 Al-Alclad alloy in the optimum mechanical properties region.