焊接过程多场耦合模拟研究进展

焊接是一个涉及到多物理场耦合的复杂过程,采用传统的试验方法研究焊接现象存在成本高、效率低、局限性等问题,数值模拟技术很好地解决了这些问题,因此该技术已成为国内外焊接工作者研究的热点,在航空航天、汽车船舶等领域得到越来越广泛的应用。介绍了影响熔池形态和焊接变形的因素以及外加磁场对改善焊缝成形的作用,重点论述了数值模拟技术在多场耦合作用下焊接熔池形态、应力与变形以及焊缝成形控制等方面的应用及研究现状,在此基础上提出了焊接过程多场耦合模拟的未来发展动向。

Research Progress of Multi-Field Coupling Simulation in Welding Process

Welding is a complex process which couples multiple physical fields.There are many problems in the study of welding phenomena by traditional experiment methods,such as high cost,low efficiency and limitation.Numerical simulation technology solves these problems well,so the technology becomes a hot spot in the welding research and is widely used in the aerospace,automotive and marine fields.This paper introduces the influence factors of the molten pool shape and welding deformation,as well as the effect of external magnetic field on the formation of weld.Moreover,this paper focuses on the application and research status of multi-field coupling numerical simulation in aspect of the molten pool shape,stress and deformation and control of weld formation.On this basis,the development trend of multi-field coupling simulation in welding process is put forward.