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首页> 外文期刊>Journal of Materials Engineering and Performance >Buckling Distortions and Mitigation Techniques for Thin-Section Structures
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Buckling Distortions and Mitigation Techniques for Thin-Section Structures

机译：薄截面结构的屈曲变形和缓解技术

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摘要

The underlying mechanisms associated with welding-induced buckling distortions are investigated using finite element procedures. Unlike stable type of welding-induced distortions which can be adequately captured by performing a thermo-plasticity simulation of actual welding procedures, local buckling distortions in welded structures are of an unstable type, which requires the use of appropriate buckling analysis procedures incorporating welding-induced residual stress state. With the underlying mechanisms in buckling distortions being established, two effective mitigation techniques were presented. One is trailing heat sink and the other is in-process synchronized rolling techniques. Detailed finite element simulations were performed to demonstrate how some of the important process parameters can be established in effectively reducing or eliminating the buckling distortions. The proposed techniques were also validated by laboratory welding trials. The underlying principles and potential applications of the distortion mitigation techniques are also discussed in light of the detailed finite element simulation results.
机译：使用有限元程序研究了与焊接引起的屈曲变形相关的基本机制。与可以通过执行实际焊接过程的热塑性模拟来充分捕获的稳定类型的焊接引起的变形不同，焊接结构中的局部屈曲变形属于不稳定类型，因此需要使用结合了焊接引起的适当屈曲分析程序残余应力状态。通过建立屈曲变形的基本机制，提出了两种有效的缓解技术。一种是尾随散热器，另一种是过程中同步轧制技术。进行了详细的有限元模拟，以演示如何建立一些重要的过程参数，以有效地减少或消除屈曲变形。提议的技术也通过实验室焊接试验得到了验证。根据详细的有限元模拟结果，还将讨论失真消除技术的基本原理和潜在应用。

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