| 苗臣怀， 曹丽杰， 殷凯， 王楠楠.5052铝合金搅拌摩擦焊残余应力场数值模拟研究[J].轻工机械,2020,38(1):46-54 |
| 5052铝合金搅拌摩擦焊残余应力场数值模拟研究 |
| Numerical Simulation Study of Residual Stress Field of Friction Stir Welding of 5052 Aluminum Alloy |
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| DOI：10.3969/j.issn.1005 2895.2020.01.009 |
| 中文关键词: 搅拌摩擦焊 应力场 正交设计 热弹塑性法 顺序热力耦合 |
| 英文关键词:friction stir welding stress field orthogonal design thermal elastic plastic method sequential thermal coupling |
| 基金项目:国家自然科学基金资助项目（41807235）。 |
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| 中文摘要: |
| 针对目前铝合金搅拌摩擦焊的焊后残余应力过大，且内部残余应力难以测量的现象，课题组提出了基于热弹塑性法和顺序热力耦合方式的搅拌摩擦焊应力模拟的热源模型、边界条件模型和有限元模型，采用正交设计的方法对影响残余应力3个主要因素进行数值模拟的设计，并对模拟结果进行试验验证。模拟与试验结果均表明合适的焊接参数（转速取1 000 r·min-1，焊速取120 mm·min-1，预热时间取3 s）能有效减小5020铝合金搅拌摩擦焊的焊后残余应力，且数值模拟得到残余应力与实际焊后残余应力结果较为吻合。 |
| 英文摘要: |
| Aiming at the excessive residual stress and the difficulty to measure the residual stress of friction stir welding of aluminum alloy, the heat source model, boundary condition model and finite element model was proposed based on thermal elastic plastic method and sequential thermal coupling stress simulation of friction stir welding. The orthogonal design method was adopted to simulate the three main factors that affect the residual stress in the design of the numerical simulation, and the simulation results were verified by experiments. The results show that suitable welding parameters (speed 1 000 r·min-1, welding speed take 120 mm·min-1, preheating time take 3 s) can effectively reduce the residual stress after welding of friction stir welding for 5020 aluminum alloy, and the numerical simulation results was coincident with the actual residual stress after welding results. |
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