船用5083铝合金随焊滚压工艺的有限元计算
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Finite Element Calculation of Rolling with Welding Procedure of Marine 5083 Aluminum Alloy
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    摘要:

    船用5083铝合金在焊接过程中较易出现热裂纹,主要原因是在脆性温度区间存在较大的收缩内应力。为此,对随焊滚压工艺进行研究,采用有限元分析软件MSC.Marc进行焊接工艺模拟,综合考虑焊接热源模型、材料性能和滚压等边界条件,建立船用5083铝合金工件的随焊滚压有限元模型,对比船用5083铝合金薄板在普通焊接工艺及随焊滚压工艺下的焊后残余应力。计算结果表明,在随焊滚压工艺下选择合适的轮枪距及压下量可有效降低焊后残余应力。

    Abstract:

    In the welding process, marine 5083 aluminum alloy is prone to the thermal cracks, and the main reason lies in the existence of large internal shrinkage stress in the brittle temperature range. Therefore, the rolling with welding procedure is studied. The welding procedure simulation is performed with the finite element analysis software MSC.Marc, the boundary conditions such as welding heat source model, material properties, and rolling are considered comprehensively, the rolling with welding finite element model of marine 5083 aluminum alloy workpiece is established, and the postwelding residual stresses of marine 5083 aluminum alloy thin plate under normal welding procedure and rolling with welding procedure are compared. The calculation results show that the postwelding residual stress can be effectively reduced by selecting the proper distance between roller and welding gun and selecting drafts in rolling under rolling with welding procedure.

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黄震宇.船用5083铝合金随焊滚压工艺的有限元计算[J].造船技术,2022,(05):76-79

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  • 在线发布日期: 2022-10-14
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