基于DEM-FEM的AZ31B板材软模成形极限预测

发布时间：2018-03-23 02:33

本文选题：离散元　切入点：有限元　出处：《中国有色金属学报》2017年04期 　论文类型：期刊论文

【摘要】：针对金属板材固体颗粒介质成形工艺中散体颗粒的离散性能和板材连续变形特点,提出并构建离散元-有限元耦合仿真模型。通过试验和数值模拟相结合的方法,建立镁合金板材温热成形韧性破裂准则,并验证该准则的有效性。最后结合韧性断裂准则对AZ31B镁合金固体颗粒介质筒形件温热拉深进行离散元-有限元耦合模拟,对其成形极限进行预测分析,并展开相应条件下的拉深成形试验。结果表明:基于韧性断裂准则的离散元-有限元耦合分析方法可以有效预测镁合金板固体颗粒介质温热拉深成形极限。
[Abstract]:According to the discrete properties of granular particles and the characteristics of continuous deformation of sheet metal in solid particle medium forming process, a coupling simulation model of discrete element and finite element is proposed and constructed. The ductile fracture criterion of hot forming of magnesium alloy sheet is established and the validity of the criterion is verified. Finally, the discrete element finite element coupling simulation is carried out to simulate the temperature drawing of AZ31B magnesium alloy solid granular media tube with ductile fracture criterion. The forming limit is predicted and analyzed. The results show that the coupling analysis method of discrete element and finite element based on ductile fracture criterion can effectively predict the forming limit of solid particle medium in magnesium alloy sheet.
【作者单位】：燕山大学国家冷轧板带装备及工艺工程技术研究中心;燕山大学先进锻压成形技术与科学教育部重点实验室(燕山大学);燕山大学车辆与能源学院;
【基金】：国家自然科学基金资助项目(51305385,51305386) 河北省高等学校科学技术研究青年基金项目(QN20131080)~~
【分类号】：TG146.22

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