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Letteratura scientifica selezionata sul tema "Metals Fatigue"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 26 luglio 2024

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Articoli di riviste sul tema "Metals Fatigue"

1

Correia, J. A. F. O., A. M. P. De Jesus, I. F. Pariente, J. Belzunce e A. Fernández-Canteli. "Mechanical fatigue of metals". Engineering Fracture Mechanics 185 (novembre 2017): 1. http://dx.doi.org/10.1016/j.engfracmech.2017.10.029.

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2

Polák, Jaroslav, Jiří Man e Ivo Kuběna. "The True Shape of Persistent Slip Markings in Fatigued Metals". Key Engineering Materials 592-593 (novembre 2013): 781–84. http://dx.doi.org/10.4028/www.scientific.net/kem.592-593.781.

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Persistent slip markings (PSMs) were experimentally studied in 316L steel fatigued to early stages of the fatigue life. High resolution SEM, combined with focused ion beam (FIB) technique and atomic force microscopy (AFM) were used to assess the true shape of PSMs in their early stage of development. General features of PSMs in fatigued metals are extrusions and intrusions. Their characteristic features were determined. They were discussed in relation with the theories of surface relief formation and fatigue crack initiation based on the formation, migration and annihilation of point defects in the bands of intensive cyclic slip - persistent slip bands (PSBs)

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3

Enomoto, Masatoshi. "Prediction of Fatigue Life for Light Metals and their Welded Metals". Materials Science Forum 794-796 (giugno 2014): 273–77. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.273.

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A6N01 (6005C in ISO) base metal is applied for cantilever type fatigue test over 108 cyclic number. Fatigue strength decreases over 107 and after testing, new prediction formula of fatigue life at high cycle regeion which named YENs formula is proposed for light metal and their welded joints. This formula is shown as below. Log (σa/σp) =k Log (Nf-N0)+m σa is stress amplitude, σp is proof stress k is depend on stress concentration factor Nf is fatigue life without residual stress and No is discrepancy due to residual stress. m is material constant. This formula is a hypothesis and it is required to accumulate much more fatigue data for many kind of alloys and their welded joints.

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4

KAWAGOISHI, Norio, Qiang CHEN, Masahiro GOTO, Qingyuan WANG e Hironobu NISITANI. "Ultrasonic Fatigue Properties of Metals". Proceedings of Conference of Kyushu Branch 2003 (2003): 47–48. http://dx.doi.org/10.1299/jsmekyushu.2003.47.

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5

TROSHCHENKO, V. T. "Fatigue fracture toughness of metals". Fatigue & Fracture of Engineering Materials & Structures 32, n. 4 (aprile 2009): 287–91. http://dx.doi.org/10.1111/j.1460-2695.2009.01343.x.

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6

Fonseca de Oliveira Correia, José António, Miguel Muñiz Calvente, Abílio Manuel Pinho de Jesus e Alfonso Fernández-Canteli. "ICMFM18-Mechanical fatigue of metals". International Journal of Structural Integrity 8, n. 6 (4 dicembre 2017): 614–16. http://dx.doi.org/10.1108/ijsi-10-2017-0055.

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7

Pineau, André, David L. McDowell, Esteban P. Busso e Stephen D. Antolovich. "Failure of metals II: Fatigue". Acta Materialia 107 (aprile 2016): 484–507. http://dx.doi.org/10.1016/j.actamat.2015.05.050.

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8

Vinogradov, A., e S. Hashimoto. "Fatigue of Severely Deformed Metals". Advanced Engineering Materials 5, n. 5 (16 maggio 2003): 351–58. http://dx.doi.org/10.1002/adem.200310078.

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Teng, N. J., e T. H. Lin. "Elastic Anisotropy Effect of Crystals on Polycrystal Fatigue Crack Initiation". Journal of Engineering Materials and Technology 117, n. 4 (1 ottobre 1995): 470–77. http://dx.doi.org/10.1115/1.2804741.

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Fatigue bands have been observed in both monocrystalline and polycrystalline metals. Extrusions and intrusions at the free surface of fatigued specimens are favorable sites for fatigue crack nucleation. Previous studies (Lin and Ito, 1969; Lin, 1992) mainly concerned the fatigue crack initiation in aluminum and its alloys. The elastic anisotropy of individual crystals of these metals is insignificant and was accordingly neglected. However, the anisotropy of the elastic constants of some other metallic crystals, such as titanium and some intermetallic compounds, is not negligible. In this paper, the effect of crystal anisotropy is considered by using Eshelby’s equivalent inclusion method. The polycrystal analyzed is Ni3Al intermetallic compound. The plastic shear strain distributions and the cumulative surface plastic strain in the fatigue band versus the number of loading cycles were calculated, and the effect of crystal anisotropy on the growth of the extrusions was examined.

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Lowe, Terry C. "Enhancing Fatigue Properties of Nanostructured Metals and Alloys". Advanced Materials Research 29-30 (novembre 2007): 117–22. http://dx.doi.org/10.4028/www.scientific.net/amr.29-30.117.

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Recent research on the fatigue properties of nanostructured metals and alloys has shown that they generally possess superior high cycle fatigue performance due largely to improved resistance to crack initiation. However, this advantage is not consistent for all nanostructured metals, nor does it extend to low cycle fatigue. Since nanostructures are designed and controlled at the approximately the same size scale as the defects that influence crack initiation attention to preexisting nanoscale defects is critical for enhancing fatigue life. This paper builds on the state of knowledge of fatigue in nanostructured metals and proposes an approach to understand and improve fatigue life using existing experimental and computational methods for nanostructure design.

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Tesi sul tema "Metals Fatigue"

1

Nowicki, Timothy. "Statistical model prediction of fatigue life for diffusion bonded Inconel 600 /". Online version of thesis, 2008. http://hdl.handle.net/1850/7984.

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2

Fernandes, Paulo Jorge Luso. "Fatigue and fracture of metals in liquid-metal environments". Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337963.

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3

Lunt, William S. "Molecular dynamics simulation of fatigue damage in metals". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FLunt.pdf.

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Erasmus, Daniel Jacobus. "The fatigue life cycle prediction of a light aircraft undercarriage". Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1527.

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The reliability of systems relies heavily on accurate fatigue life prediction of related components. Fatigue life prediction is a complicated process requiring the correct methodology to determine accurate and reliable predictions. The Palmgren – Miner damage accumulation hypothesis is widely used in determining the fatigue life of components exposed to variable loading conditions. Modifications have been made to this hypothesis trying to achieve a greater degree of accuracy, of these the Liu – Zenner modification has been the most successful. In this report the systematic process of fatigue life prediction using the Liu – Zenner modification to achieve reliable results is calculated. A representative stress time history measured in service on the component forms the basis for defining a flight cycle which is the chosen unit in which to express the fatigue life. Rainflow cycle counting performed on the stress time history allowed the formulation of a load spectrum to which the component is exposed in one cycle. Combining the load spectrum with the developed SN curve of the component and using the Liu – Zenner modification to the Palmgren – Miner rule a reliable fatigue life in cycles is predicted.

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Williams, Zachary. "Krouse Fatigue for Metals with Elevated Mean Stress". Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1597075964521893.

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Repetto, Eduardo A. Ortiz Michael. "On the fatigue behavior of ductile F.C.C. metals /". Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechETD:etd-01242008-133649.

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Zhao, Tianwen. "Fatigue of aluminum alloy 7075-T651 /". abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3342620.

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Thesis (Ph. D.)--University of Nevada, Reno, 2008.
"December, 2008." Includes bibliographical references (leaves 76-83). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2009]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.

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Morrissey, Ryan J. "Frequency and mean stress effects in high cycle fatigue of Ti-6A1-4V". Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17095.

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Jin, Ohchang. "The characterization of small fatigue crack growth in PH13-8 Mo stainless steel". Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/19633.

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Ghodratighalati, Mohamad. "Multiscale Modeling of Fatigue and Fracture in Polycrystalline Metals, 3D Printed Metals, and Bio-inspired Materials". Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/104944.

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The goal of this research is developing a computational framework to study mechanical fatigue and fracture at different length scales for a broad range of materials. The developed multiscale framework is utilized to study the details of fracture and fatigue for the rolling contact in rails, additively manufactured alloys, and bio-inspired hierarchical materials. Rolling contact fatigue (RCF) is a major source of failure and a dominant cause of maintenance and replacements in many railways around the world. The highly-localized stress in a relatively small contact area at the wheel-rail interface promotes micro-crack initiation and propagation near the surface of the rail. 2D and 3D microstructural-based computational frameworks are developed for studying the rolling contact fatigue in rail materials. The method can predict RCF life and simulate crack initiation sites under various conditions. The results obtained from studying RCF behavior in different conditions will help better maintenance of the railways and increase the safety of trains. The developed framework is employed to study the fracture and fatigue behavior in 3D printed metallic alloys fabricated by selective laser melting (SLM) method. SLM method as a part of metal additive manufacturing (AM) technologies is revolutionizing the manufacturing sector and is being utilized across a diverse array of industries, including biomedical, automotive, aerospace, energy, consumer goods, and many others. Since experiments on 3D printed alloys are considerably time-consuming and expensive, computational analysis is a proper alternative to reduce cost and time. In this research, a computational framework is developed to study fracture and fatigue in different scales in 3D printed alloys fabricated by the SLM method. Our method for studying the fatigue at the microstructural level of 3D printed alloys is pioneering with no similar work being available in the literature. Our studies can be used as a first step toward establishing comprehensive numerical frameworks to investigate fracture and fatigue behavior of 3D metallic devices with complex geometries, fabricated by 3D printing. Composite materials are fabricated by combining the attractive mechanical properties of materials into one system. A combination of materials with different mechanical properties, size, geometry, and order of different phases can lead to fabricating a new material with a wide range of properties. A fundamental problem in engineering is how to find the design that exhibits the best combination of these properties. Biological composites like bone, nacre, and teeth attracted much attention among the researchers. These materials are constructed from simple building blocks and show an uncommon combination of high strength and toughness. By inspiring from simple building blocks in bio-inspired materials, we have simulated fracture behavior of a pre-designed composite material consisting of soft and stiff building blocks. The results show a better performance of bio-inspired composites compared to their building blocks. Furthermore, an optimization methodology is implemented into the designing the bio-inspired composites for the first time, which enables us to perform the bio-inspired material design with the target of finding the most efficient geometries that can resist defects in their structure. This study can be used as an effective reference for creating damage-tolerant structures with improved mechanical behavior.
Doctor of Philosophy
The goal of this research is developing a multiscale framework to study the details of fracture and fatigue for the rolling contact in rails, additively manufactured alloys, and bio-inspired hierarchical materials. Rolling contact fatigue (RCF) is a major source of failure and a dominant cause of maintenance and replacements in many railways around the world. Different computational models are developed for studying rolling contact fatigue in rail materials. The method can predict RCF life and simulate crack initiation sites under various conditions and the results will help better maintenance of the railways and increase the safety of trains. The developed model is employed to study the fracture and fatigue behavior in 3D printed metals created by the selective laser melting (SLM) method. SLM method as a part of metal additive manufacturing (AM) technologies is revolutionizing industries including biomedical, automotive, aerospace, energy, and many others. Since experiments on 3D printed metals are considerably time-consuming and expensive, computational analysis is a proper alternative to reduce cost and time. Our method for studying the fatigue at the microstructural level of 3D printed alloys can help to create more fatigue and fracture resistant materials. In the last section, we have studied fracture behavior in bio-inspired materials. A fundamental problem in engineering is how to find the design that exhibits the best combination of mechanical properties. Biological materials like bone, nacre, and teeth are constructed from simple building blocks and show a surprising combination of high strength and toughness. By inspiring from these materials, we have simulated fracture behavior of a pre-designed composite material consisting of soft and stiff building blocks. The results show a better performance of bio-inspired structure compared to its building blocks. Furthermore, an optimization method is implemented into the designing the bio-inspired structures for the first time, which enables us to perform the bio-inspired material design with the target of finding the most efficient geometries that can resist defects in their structure.

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Più fonti

Libri sul tema "Metals Fatigue"

1

1954-, Hejwowski Tadeusz, a cura di. Thermal fatigue of metals. New York: M. Dekker, 1991.

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2

Schijve, Jaap. Biaxial Fatigue of Metals. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23606-3.

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Bathias, Claude. Fatigue Limit in Metals. Hoboken, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118648704.

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4

Correia, José A. F. O., Abílio M. P. De Jesus, António Augusto Fernandes e Rui Calçada, a cura di. Mechanical Fatigue of Metals. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13980-3.

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5

Cardona, D. C. Fatigue of brittle metals. Birmingham: University of Birmingham, 1990.

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6

I, Stephens R., e Fuchs H. O. 1907-, a cura di. Metal fatigue in engineering. 2^a ed. New York: Wiley, 2001.

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7

Dang, Van Ky, e Papadopoulos Iōannēs V, a cura di. High-cycle metal fatique: From theory to applications. Wien: Springer, 1999.

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8

J, Comer Jess, e Handrock James L, a cura di. Fundamentals of metal fatigue analysis. Englewood Cliffs, N.J: Prentice Hall, 1990.

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1935-, Marsh K. J., e Pook L. P, a cura di. Metal fatigue. Mineola, NY: Dover Publications, 1999.

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10

Milella, Pietro Paolo. Fatigue and Corrosion in Metals. Milano: Springer Milan, 2013. http://dx.doi.org/10.1007/978-88-470-2336-9.

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Capitoli di libri sul tema "Metals Fatigue"

1

Kaesche, Helmut. "Corrosion Fatigue". In Corrosion of Metals, 525–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-96038-3_16.

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2

Carlson, R. L., G. A. Kardomateas e J. I. Craig. "Fatigue in Metals". In Solid Mechanics and Its Applications, 19–39. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4252-9_3.

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Milella, Pietro Paolo. "Fatigue Testing. Fatigue Curve Construction and Fatigue Limit Assessment". In Fatigue and Corrosion in Metals, 431–78. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-51350-3_10.

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Milella, Pietro Paolo. "Corrosion Fatigue". In Fatigue and Corrosion in Metals, 767–806. Milano: Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2336-9_16.

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Milella, Pietro Paolo. "Multiaxial Fatigue". In Fatigue and Corrosion in Metals, 477–520. Milano: Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2336-9_9.

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Milella, Pietro Paolo. "Corrosion Fatigue". In Fatigue and Corrosion in Metals, 885–923. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-51350-3_20.

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Milella, Pietro Paolo. "Multiaxial Fatigue". In Fatigue and Corrosion in Metals, 593–636. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-51350-3_13.

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Bhaduri, Amit. "Fatigue". In Mechanical Properties and Working of Metals and Alloys, 317–71. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7209-3_8.

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Milella, Pietro Paolo. "Stress-Based Fatigue Analysis High Cycle Fatigue". In Fatigue and Corrosion in Metals, 245–308. Milano: Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2336-9_5.

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Milella, Pietro Paolo. "Strain-Based Fatigue Analysis Low Cycle Fatigue". In Fatigue and Corrosion in Metals, 309–63. Milano: Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2336-9_6.

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Atti di convegni sul tema "Metals Fatigue"

1

Mamiya, Edgar Nobuo, e José Alexander Araújo. "A Criterion to Predict the Fatigue Strength of Hard Metals under Multiaxial Loading". In SAE Brasil International Conference on Fatigue. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-4065.

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Luong, Minh Phong. "Infrared thermography of fatigue in metals". In Aerospace Sensing, a cura di Jan K. Eklund. SPIE, 1992. http://dx.doi.org/10.1117/12.58539.

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3

"The Development of Fatigue Cracks in Metals". In Experimental Mechanics of Solids. Materials Research Forum LLC, 2019. http://dx.doi.org/10.21741/9781644900215-18.

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Luong, Minh Phong. "Fatigue evaluation of metals using infrared thermography". In Second International Conference on Experimental Mechanics, a cura di Fook S. Chau e Chenggen Quan. SPIE, 2001. http://dx.doi.org/10.1117/12.429590.

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Xue, Yibin, Tong Li e Frank Abdi. "Fatigue Damage Initiation Life Prediction for Heterogeneous Metals". In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2013. http://dx.doi.org/10.2514/6.2013-1653.

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Krapez, J. C., D. Pacou e G. Gardette. "Lock-in thermography and fatigue limit of metals". In 2000 Quantitative InfraRed Thermography. QIRT Council, 2000. http://dx.doi.org/10.21611/qirt.2000.051.

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Ewenz, L. "Approach to transferring force-based fatigue curves into stress-related fatigue curves for clinch joints". In Sheet Metal 2023. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902417-18.

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Abstract (sommario):

Abstract. Cyclic strength is essential in many lightweight design concepts where the design is to be pushed to the limits of strength. While joining dissimilar metals such as aluminum and steel is a challenge of its own, fatigue life prediction for this joining type is all the more challenging. Here, clinching as a mechanical joining process offers many advantages. However, a generalized evaluation of the fatigue properties is complex since many influencing factors, such as the joint's geometry, the high plastic deformation, the proportion of bonding mechanisms, have to be considered. Force versus number of cycles (F-N) curves are the established basis to describe the fatigue behavior of clinch joints. However, a generalized evaluation of the service life requires stress versus number of cycles (S-N) curves. This research gives a first approach to transferring F-N curves to S-N curves on the basis of nominal stress determination in the damage relevant clinch cross section. The material combination used, EN AW-6014 and HCT590, offers excellent practical relevance since both materials are widely used in the automotive industry.

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San Marchi, Chris, e Brian P. Somerday. "Fatigue Crack Growth of Structural Metals for Hydrogen Service". In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57701.

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As hydrogen fuel cell technologies achieve market penetration, there is a growing need to characterize a range of structural metals that are used in the hydrogen environments that are encountered in gaseous hydrogen fuel systems. A review of existing data show that hydrogen can significantly accelerate fatigue crack growth of many common structural metals; however, comprehensive characterization of the effects of hydrogen on fatigue properties is generally lacking from the literature, even for structural metals that have been used extensively in high-pressure gaseous hydrogen environments. This report provides new testing data on the effects of hydrogen on fatigue of structural metals that are commonly employed in high-pressure gaseous hydrogen.

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Vshivkov, A., A. Iziumova e O. Plekhov. "Experimental study of thermodynamics propagation fatigue crack in metals". In ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4932925.

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Boyce, Brad, Christopher Barr, Ta Duong, Daniel Bufford, A. Molkeri, Nathan Heckman, David Adams, A. Srivastava, Khalid Hattar e Michael Demkowicz. "Implications of Fatigue-Crack Healing in Nanocrystalline Metals [Slides]". In TMS 2022 Annual Meeting & Exhibition, Anaheim, CA (United States), 27 Feb- 3 Mar 2022. US DOE, 2023. http://dx.doi.org/10.2172/2002234.

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Rapporti di organizzazioni sul tema "Metals Fatigue"

1

Farkas, Diana. Atomistic Mechanisms of Fatigue in Nanocrystalline Metals. Fort Belvoir, VA: Defense Technical Information Center, dicembre 2004. http://dx.doi.org/10.21236/ada438940.

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2

Hertzberg, Richard W. Fatigue and Fracture Mechanics of Structural Metals, Plastics, and Composites. Fort Belvoir, VA: Defense Technical Information Center, agosto 1986. http://dx.doi.org/10.21236/ada173064.

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3

Lewandowski, John J. Microstructural Effects on Fracture and Fatigue of Advanced Refractory Metals and Composites. Fort Belvoir, VA: Defense Technical Information Center, giugno 2001. http://dx.doi.org/10.21236/ada387898.

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4

Guralnick. Hysteresis and Acoustic Emission as Non-Destructive Measures of the Fatigue Process in Metals. Fort Belvoir, VA: Defense Technical Information Center, marzo 1995. http://dx.doi.org/10.21236/ada295602.

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5

Hackel, L. A., e H.-L. Chen. Laser Peening--Strengthening Metals to Improve Fatigue Lifetime and Retard Stress-Induced Corrosion Cracking in Gears, Bolts and Cutter. Office of Scientific and Technical Information (OSTI), agosto 2003. http://dx.doi.org/10.2172/15004997.

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6

Maxey. L51427 ERW Weld Zone Characteristics. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), giugno 1992. http://dx.doi.org/10.55274/r0011187.

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Abstract (sommario):

The objective of this research project was to determine the fatigue characteristics of the weld zone of electric resistance welded (ERW) pipe. The project involved: (1) characterizing pipe samples in terms of initial defects, tensile and yield strength, chemistry, and fracture toughness, (2) evaluating the fatigue crack growth of base metal and the weld zone in air and a 3.5 wt% NaCl solution, and (3) evaluating the fatigue crack growth of machined defects in the weld zone of ERW pipe subjected to cyclic pressure loading. This study found that the weld zone and base metal exhibit the same fatigue crack growth rates, the weld zone is not more susceptible to corrosion fatigue damage, and the greatest variability in ERW pipe fatigue behavior lies in the initial defect distribution.

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Riveros, Guillermo, e Hussam Mahmoud. Underwater carbon fiber reinforced polymer (CFRP)–retrofitted steel hydraulic structures (SHS) fatigue cracks. Engineer Research and Development Center (U.S.), marzo 2023. http://dx.doi.org/10.21079/11681/46588.

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Recent advances in the use of fiber-reinforced polymers (FRP) to retrofit steel structures subjected to fatigue cracks have shown to be a viable solution for increasing fatigue life in steel hydraulic structures (SHS). Although several studies have been conducted to evaluate the use of FRP for retrofitting metal alloys and the promising potential of such has been well-demonstrated, the application has never been implemented in underwater steel structures. This Coastal and Hydraulics Engineering Technical Note presents the implementation of FRP patches to repair fatigue cracks at Old Hickory Lock and Dam miter gate.

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Bi, Yunpeng, Xi Li, Huixin Yan, Xiaomei Zhang, Hongyi Guan, Haiyu Zhu, Tingwei Ding e Bailin Song. Acupoint massage for chronic fatigue syndrome：A protocol for systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, aprile 2023. http://dx.doi.org/10.37766/inplasy2023.4.0083.

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Review question / Objective: With changes in lifestyle and rhythm, chronic fatigue syndrome (CFS) is becoming increasingly common in the population. Many randomized controlled clinical studies have shown that acupoint massage has significant advantages in improving symptoms such as fatigue. However, there is no systematic review and meta-analysis published on the treatment of chronic fatigue syndrome with acupoint massage, which is worthy of our team's research. Condition being studied: Chronic fatigue syndrome (CFS) is characterized by persistent or recurrent conscious fatigue, accompanied by accompanying symptoms such as sleep disorders, subjective cognitive impairment, or diffuse muscle and bone pain. Its symptoms usually persist for six months or more, and fatigue cannot be relieved after rest. The average prevalence of CFS in the global general population ranges from 1.40 to 1.57%. However, the impact of acupoint massage on chronic vibration fatigue syndrome is still controversial. Therefore, a current systematic review and meta-analysis will be conducted to investigate the role of acupoint massage in the management of chronic fatigue syndrome.

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Rosenfeld e Kiefner. L52270 Basics of Metal Fatigue in Natural Gas Pipeline Systems - A Primer for Gas Pipeline Operators. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), novembre 2004. http://dx.doi.org/10.55274/r0010154.

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The natural gas pipeline industry is rapidly implementing comprehensive integrity management practices to meet the demands of new regulatory imperatives and public interests. These new demands require formal integrity management planning programs be developed and applied where pipeline failures could affect High Consequence Areas�. A formal integrity management plan (IMP) incorporates some process for identifying threats to a pipeline's integrity. Such threats come in many forms and are uniquely dependent on a wide range of attributes associated with an individual pipeline segment. Interest (or concern) has arisen regarding metal fatigue as one such possible integrity threat. We know from some pipeline failures that occasionally and under certain circumstances, fatigue may constitute a potential threat. The cumulative body of knowledge derived by theory, test, and experience on the subject of fatigue and its effects on piping, pressurized equipment, and welded structures is vast in scope and detail, and it is not the intention of this document to summarize that. Rather, it is intended that this document provide natural gas pipeline operators and others interested in natural gas pipeline safety with a useful understanding of the extent to which fatigue could pose a legitimate and actionable safety threat, as well as to demonstrate the author's opinion that in most respects, fatigue remains a comparatively minor risk component of the overall spectrum of threats to natural gas pipeline safety.

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Wang, Yanli, Peijun Hou e Sam Sham. Report on FY 2020 creep, fatigue and creep fatigue testing of Alloy 709 base metal at ORNL. Office of Scientific and Technical Information (OSTI), settembre 2020. http://dx.doi.org/10.2172/1671410.

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