Abstract
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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Giuseppe Marannano is a researcher at the University of Palermo and Assistant Professor of machine design. His main research areas are mechanics of composite materials, numerical methods, experimental stress analysis, fatigue fracture and material design.
Antonio Pasta is a full professor at the University of Palermo (Italy). His research interests are fatigue fracture and material design, fatigue behavior of materials and composites, experimental methods for composites.
Francesco Parrinello is a researcher at the University of Palermo and Professor of Computational Mechanic of Structures. His main research areas are nonlocal damage and constitutive models, interface constitutive modelling, kinematical modelling of strong discontinuity by extended finite element method.
Antonio Giallanza is a researcher at the University of Palermo and Assistant Professor of mechanical plants and project management. His main research areas are analysis and design of industrial plants and general services of plant.
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Marannano, G., Pasta, A., Parrinello, F. et al. Effect of the indentation process on fatigue life of drilled specimens. J Mech Sci Technol 29, 2847–2856 (2015). https://doi.org/10.1007/s12206-015-0613-0
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DOI: https://doi.org/10.1007/s12206-015-0613-0