Numerical Simulation of the Stress-Strain State of a PAW-MIG-Welded 1561 Aluminum Alloy Butt Joint Produced Under Different Process Modes

IF 0.7 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Strength of Materials Pub Date : 2024-07-19 DOI:10.1007/s11223-024-00645-5

V. V. Kvasnytskyi, A. O. Perepichai, O. V. Prokhorenko, O. A. Slyvinskyi, I. M. Lagodzinskyi

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Abstract

Hybrid plasma-arc welding with a consumable electrode (PAW-MIG) of sheet aluminum alloy blanks exposed to a fast-moving heat source is involved in the formation of residual stresses and strains that can lead to changes in size and shape, buckling distortion, fatigue strength reduction, and deterioration of other operational properties of the welded product. This necessitates to introduce additional arrangements for reducing welding strains, stresses, and displacements, such as rigid outfits. Finite-element analysis of residual stress-strain state parameters of PAW-MIG welded 1561 aluminum alloy butt joints 5 mm thick with two different process modes: in the free state and in the outfit followed by its removal after cooling, was performed. The PAW-MIG welding after the second alternative compared to the first one was established to reduce the total displacements by 15 times and equivalent stresses by more than 30%, it also provides a decrease in displacements on the weld axis: longitudinal by 1.5 times and buckling distortion by 16.7 times.

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不同工艺模式下生产的 PAW-MIG 焊接 1561 铝合金对接接头的应力-应变状态数值模拟

使用易损电极（PAW-MIG）对暴露在快速移动热源下的铝合金板坯进行混合等离子弧焊时，会形成残余应力和应变，从而导致焊接产品的尺寸和形状发生变化、弯曲变形、疲劳强度降低以及其他操作性能下降。因此，有必要引入额外的安排来减少焊接应变、应力和位移，如刚性外罩。在两种不同的工艺模式下，即在自由状态下和在冷却后拆除装备的状态下，对厚度为 5 毫米的 PAW-MIG 焊接 1561 铝合金对接接头的残余应力-应变状态参数进行了有限元分析。与第一种模式相比，第二种模式下的 PAW-MIG 焊接可将总位移减少 15 倍，等效应力减少 30% 以上，同时还可减少焊接轴线上的位移：纵向位移减少 1.5 倍，屈曲变形减少 16.7 倍。

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来源期刊

Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Strength of Materials focuses on the strength of materials and structural components subjected to different types of force and thermal loadings, the limiting strength criteria of structures, and the theory of strength of structures. Consideration is given to actual operating conditions, problems of crack resistance and theories of failure, the theory of oscillations of real mechanical systems, and calculations of the stress-strain state of structural components.