Effect of Cold Working and Ring Indentation on Fatigue Life of Aluminum Alloy Specimens

Marannano, Giuseppe Vincenzo; Mariotti, Gabriele Virzi’; D’Acquisto, Leonardo; Restivo, Gaetano; Gianaris, N.

doi:10.1111/ext.12018

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…However, the principal advantage is that a specific tooling is not needed, thus giving the process great flexibility as well as great formability compared with other forming processes. These processes are presented as 2 of 14 interesting alternatives in important industries such as the medical product manufacturing, aeronautics, and transport industries, among other applications [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

2D–3D Digital Image Correlation Comparative Analysis for Indentation Process

et al. 2019

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Nowadays, localized forming operations, such as incremental forming processes, are being developed as an alternative to conventional machining or forming techniques. An indentation process is the main action that takes places in these forming activities, allowing small, localized deformations. It is essential to have the knowledge of the material behavior under the punch and the transmitted forces to achieve correct control of the entire procedure. This paper presents the work carried out with the digital image correlation (DIC) technique applied to the study of the material flow that takes place under an indentation process. The material flow analysis is performed under 2D and 3D conditions, establishing the methodology for the calibration and implementation for each alternative. Two-dimensional DIC has been proven to be a satisfactory technique compared with the 3D method, showing results in good agreement with experimental tests and models developed by the finite element method. Notwithstanding, part of the indented material flows under the punch, emerging on the front surface and generating a dead zone that can only be addressed with a 3D technique. So, the main objective is to carry out a comparison between the 2D and 3D techniques to identify if the 3D application could be mandatory for this type of process. Also, a 2D-3D mix analysis is proposed for study cases in which it is necessary to know the material flow in that specific area of the workpiece.

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Section: Introductionmentioning

confidence: 99%

2D–3D Digital Image Correlation Comparative Analysis for Indentation Process

et al. 2019

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“…Given the relevance of the problem, several studies have been conducted in order to identify methods that can improve the fatigue life of these components, by delaying the nucleation and propagation of fatigue cracks. Among the methods mostly used in industrial processes, plastic deformation techniques allow to generate a circumferential compressive stresses field around the hole which significantly increase the fatigue strength of the drilled elements and, at the same time, to reduce the stress intensity factor [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of aluminum-aluminum bolted joints subject to an indentation process

Fragapane

Giallanza

Cannizzaro

et al. 2015

International Journal of Fatigue

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“…In addition to the mentioned techniques, the cold expansion process is a simple life enhancement procedure that strengthens metallic components by retarding crack growth around the hole [3]. The most common methods of cold working are accomplished by using a conical mandrel or an over-sized ball.…”

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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Effect of Cold Working and Ring Indentation on Fatigue Life of Aluminum Alloy Specimens

Cited by 7 publications

References 18 publications

2D–3D Digital Image Correlation Comparative Analysis for Indentation Process

2D–3D Digital Image Correlation Comparative Analysis for Indentation Process

Experimental and numerical analysis of aluminum-aluminum bolted joints subject to an indentation process

Effect of the indentation process on fatigue life of drilled specimens

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