An investigation on bending fatigue in a corrosive environment of dual-phase 1000 sheet steel RSW joints and damage model via experiment and numeric analysis

IF 2.3 4区工程技术 Q2 ENGINEERING, MECHANICAL Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering Pub Date : 2024-06-03 DOI:10.1177/09544089241257899

Mustafa Göktaş, B. Demir, M. Elitas

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Abstract

Fatigue, corrosion, and fatigue damage models are best addressed to improve and understand the service performance of materials, particularly automotive steel. This study is an attempt to experimentally and finite element investigates plain bending fatigue performance and damage model of DP 1000 sheet steel resistance spot welding (RSW) joints in 3% NaCl aqueous corrosive treatment. RSW applications were carried out using different weld currents. The joint samples were then subjected to optical image analysis, tensile shear, and fatigue tests (3% NaCl-aqueous and normal atmosphere). A proper damage model of RSW junctions was developed and corrected by numeric analysis. Besides, RSW nugget formation, tensile shear, and plain bending fatigue tests were also applied. Consequence, fatigue behavior, tensile load carrying capacity, and effective fracture behavior of resistance spot welded joint specimens were evaluated. Results showed that a corrosive environment negatively affected fatigue performance. With the developed model, it was observed that the fatigue life of the samples decreased by 30–35% in the fatigue tests performed in the corrosive environment. Experimental and numerical analysis results of plain bending were compatible.

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通过实验和数值分析研究双相 1000 钢板 RSW 接头在腐蚀环境中的弯曲疲劳和损伤模型

疲劳、腐蚀和疲劳损伤模型是改善和了解材料（尤其是汽车钢材）服役性能的最佳方法。本研究试图通过实验和有限元研究 DP 1000 钢板电阻点焊 (RSW) 接头在 3%NaCl 水腐蚀处理下的平弯疲劳性能和损伤模型。RSW 应用采用了不同的焊接电流。然后对接头样品进行了光学图像分析、拉伸剪切和疲劳试验（3% 氯化钠水溶液和正常气氛）。通过数值分析，建立并修正了 RSW 接头的适当损伤模型。此外，还应用了 RSW 金块形成、拉伸剪切和平弯疲劳试验。结果评估了电阻点焊接头试样的疲劳行为、拉伸承载能力和有效断裂行为。结果表明，腐蚀环境对疲劳性能有负面影响。根据所开发的模型，在腐蚀环境下进行的疲劳试验中，试样的疲劳寿命缩短了 30-35%。平弯的实验结果和数值分析结果是一致的。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 工程技术-工程：机械

CiteScore

3.80

自引率

16.70%

发文量

370

审稿时长

6 months

期刊介绍： The Journal of Process Mechanical Engineering publishes high-quality, peer-reviewed papers covering a broad area of mechanical engineering activities associated with the design and operation of process equipment.