Fatigue performance of a fastener hole treated by a novel electromagnetic strengthening process

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2024-09-10 DOI:10.1016/j.ijfatigue.2024.108602

Huihui Geng , Xiaofei Xu , Zhipeng Lai , Mengyuan Gong , Quanliang Cao , Shaowei Ouyang , Liang Li

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Abstract

In this study, a novel non-contacting electromagnetic cold expansion process was proposed to improve the fatigue performance of hole component using a single power supply and a single coil. The stress state and deformation of the 6063-T6 aluminum alloy hole component during the electromagnetic strengthening process were investigated through numerical simulation. The residual stress around the hole edge was measured using XRD. Fatigue testing was performed to verify the effectiveness of the process on improving the fatigue life of the hole component. Results showed that the proposed electromagnetic strengthening process could effectively improve the fatigue life of the hole component. Fatigue life of the specimen via electromagnetic treatment is 3.42 times of that of the original specimen at a maximum stress of 120 MPa. Simulation results indicated that the generation of compressive residual stress was attributed to the falling stage of the pulse current, and the maximum compressive residual stress was −102 MPa.

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用新型电磁强化工艺处理紧固件孔的疲劳性能

本研究提出了一种新型非接触式电磁冷膨胀工艺，利用单电源和单线圈改善孔部件的疲劳性能。通过数值模拟研究了 6063-T6 铝合金孔部件在电磁强化过程中的应力状态和变形。使用 XRD 测量了孔边缘周围的残余应力。进行了疲劳测试，以验证该工艺对提高孔部件疲劳寿命的有效性。结果表明，建议的电磁强化工艺能有效提高孔部件的疲劳寿命。在最大应力为 120 兆帕时，经过电磁处理的试样的疲劳寿命是原始试样的 3.42 倍。模拟结果表明，压缩残余应力的产生归因于脉冲电流的下降阶段，最大压缩残余应力为 -102 兆帕。

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来源期刊

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.