Abstract
In this paper, the bearing capacity, taken as a combination of strength, elongation, and failure by fracture characteristics of bolt holes in two aluminum alloys, 5052-H32 and 6061-T6, that were deformed in uniaxial tension is presented and discussed. The specific role played by bolt hole confinement on the bearing capacity of each aluminum alloy is highlighted. An increase in the bearing ratio caused plastic deformation around the holes to gradually increase. For both the chosen aluminum alloys the average bearing ratio at the time of failure of the test sample was found to vary with end distance. The experimentally determined strength was observably larger than the calculated bearing strength obtained using guaranteed minimum mechanical properties and recommended mathematical relationships. The nature of final fracture of each aluminum alloy is carefully examined and the intrinsic features present on the fracture surface are rationalized in concurrence with macroscopic mechanical response.
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Acknowledgments
The authors would like to thank both Conservatek Industries of Conroe, Texas and Kawneer Corporation of Norcross, Georgia for their generous donation of materials used in this study. In addition, the authors would like to thank the University of Akron for use of mechanical testing and characterization laboratories. Also, the contributions to the study by Mr. Dave McVaney were invaluable. Sincere appreciation is also extended to the three reviewers for their useful comments and suggestions, which has helped strengthen this manuscript.
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Tinl, N., Menzemer, C.C., Manigandan, K. et al. The Bearing Strength and Fracture Behavior of Bolted Connections in Two Aluminum Alloys. J. of Materi Eng and Perform 22, 3430–3438 (2013). https://doi.org/10.1007/s11665-013-0643-7
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DOI: https://doi.org/10.1007/s11665-013-0643-7