Cold expansion effect on the fatigue crack growth of Al 6082: numerical investigation

Aid, A.; Semari, Zahar; Benguediab, M.

doi:10.12989/sem.2014.49.2.225

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…To enhance the fatigue life of the hole structure, the cold expansion strengthening technology of compression bushings is widely used [7][8][9][10]. It can reduce the hole edge stress under external load and effectively inhibit the crack generation at the hole edge [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Research on the Residual Stress Field of a Compression Bushing-Lug Plate in Cold Expansion Strengthening

Lin,

Bai,

Wang

et al. 2023

Applied Sciences

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The accurate acquisition of the residual stress field is the key to clarifying the cold expansion strengthening mechanism of compression bushings, optimizing the extrusion process parameters, and improving the structural fatigue life. In the actual cold expansion strengthening process, the resultant distribution of residual stresses is influenced by the relative extrusion amount, mandrel structure, material properties, and extrusion speed. In this article, the distribution patterns of residual stress after cold extrusion are investigated through a combination of finite element simulation and experimental measurements using a micro-region stress tester. To examine the redistribution law of the stress field of cold expansion reinforcement under external load, the compression bushing-lug-plate-reinforced structure is loaded and unloaded. The results show that large circumferential residual compressive stresses are distributed in the hole wall of the compression bushing after cold expansion. Radial residual stresses are also compressive stresses, although the values are small. In addition, the reinforced structure after cold extrusion presents a large difference in the stress redistribution rules compared with cold extrusion after the load is applied and removed.

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Section: Introductionmentioning

confidence: 99%

Research on the Residual Stress Field of a Compression Bushing-Lug Plate in Cold Expansion Strengthening

Lin,

Bai,

Wang

et al. 2023

Applied Sciences

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“…The comparison of these studies revealed that the mandrel geometry has a significant effect on the residual stress field. In Aid et al [11], finite element models have been established to bind the crack growth from an expanded hole. Stress intensity factors are determined and used to evaluate the fatigue life.…”

Section: Introductionmentioning

confidence: 99%

Effect of the indentation process on fatigue life of drilled specimens

et al. 2015

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Design and manufacture of mechanical elements are strongly influenced by the evaluation of the residual stresses due to their effects on the material strength. This paper presents numerical and experimental results performed on AW 6082-T6 aluminum alloy drilled specimens when the hole is created after a bilateral indentation process. The plastic deformation induced by the indenters creates a compressive residual stress field around the hole, which persists after the drilling operation. Several numerical analysis have been carried out in ANSYS APDL explicit solver for different indentation depths and hole diameters in order to evaluate the compressive circumferential stresses, optimal process parameters and relevant geometric features. Fatigue tests are performed in order to determine the cycles to failure and the corresponding Wöhler diagram

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Finite Element Simulation of Fatigue Damage Accumulation for Repaired Component by Cold Expansion Method

Aid

Bendouba

Benguediab

et al. 2015

Applied Condition Monitoring

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Cold expansion effect on the fatigue crack growth of Al 6082: numerical investigation

Cited by 7 publications

References 20 publications

Research on the Residual Stress Field of a Compression Bushing-Lug Plate in Cold Expansion Strengthening

Research on the Residual Stress Field of a Compression Bushing-Lug Plate in Cold Expansion Strengthening

Effect of the indentation process on fatigue life of drilled specimens

Finite Element Simulation of Fatigue Damage Accumulation for Repaired Component by Cold Expansion Method

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