增量锻造平行面过程中材料的损伤研究

Evolution of the damage during plane processing by increment forging method

在锻造系统中研究了平行面加工时材料的损伤情况.加工出了不同缺口半径的拉伸试样,并进行了拉伸实验,分别得到了材料在Cockcroft & Latham (C-L)与Ayada这2种不同损伤模型时的损伤值.根据该值利用有限元模拟软件DEFORM3D对平行面加工过程进行了模拟,并同时在锻造系统中进行了平行面的锻造试验.对有限元分析数据与试验结果进行比较,表明含有平均应力的Ayada模型更适于增量锻造过程损伤的预测.

Damage evolution of parts was studied during the process of making plane by increment forging method based on a forging system. Tensile test was conducted with notched specimen to ob- tain damage values according to two different damage models, Cockcroft and Latham （C-L） model and Ayada model. The damage values were input into finite element code DEFORM3D, and the process of making plane was simulated. Experiment of making plane was conducted with forging system. When compared finite element analysis data with experimental results, it showed that Ayada model comprising mean stress was more consistent with increment forging experiment.