摘要
通过自主设计的热拉深成形专用模具,进行了在350~450 ℃范围内的2A12硬铝合金极限应变实验,并获得了其在该温度范围内的成形极限图,进而分析了在热拉深成形过程中温度对2A12硬铝合金成形极限的影响规律.基于MSC.MARC软件,分别应用最大载荷判断法、应变路径法以及二者相结合的3种失稳准则,对板材热拉深成形极限进行数值模拟分析.通过将数值模拟结果和实验结果进行对比,发现基于二者相结合的方法与实验结果吻合较好.并且基于不同的温度建立了2A12硬铝合金的热拉深成形极限的预测模型,为2A12硬铝合金在不同温度下进行构件实验奠定了理论基础.
The ultimate strain experiment of hard aluminum alloy 2A12 at 350-450 ℃ was carried out by special thermal drawing die of independent design,and its forming limit diagram of strain at this temperature ranges was obtained. Then, the influences of temperature on the forming limit diagrams of hard aluminum alloy 2A12 in the thermal drawing process were analyzed,and the thermal drawing forming limit of sheet metal was numerically simulated by three wrinkle criterions such as the maximum load judgement method,strain path method and combination of the above two methods based on MSC.MARC software. Comparing the numerical simulation results with the experimen-tal results,it is found that the combination of two methods are in good agreement with the experimental results. Based on different temper-atures,a prediction model of thermal drawing limit of hard aluminum alloy 2A12 was established,which provides a theoretical basis for the forming experiment of hard aluminum alloy 2A12 at different temperatures.
出处
《锻压技术》
CAS
CSCD
北大核心
2018年第1期170-176,共7页
Forging & Stamping Technology
基金
国家重点研发计划(2017YFB0306300)
国家自然科学基金重点项目(51235010)
中南大学研究生自主探索创新项目(1053320170677)
