An Energy Analysis of Impact Strength Tests Using Pendulum Hammers

• Autorzy: Godzimirski Jan , Komorek Zenon , Komorek Andrzej

Identyfikatory

DOI

10.12913/22998624/113051

• Języki publikacji: EN

Abstrakty

EN

An attempt to estimate the value of the deformation energy of a metal specimen and the research system during impact strength tests on pendulum hammers was made. In the experimental research it was found that the rectangular metal specimens of the same cross-sectional area exhibit different impact strength, depending on the direction of the load (bending stiffness) whereas the destruction work of such samples exposed to static bending is comparable. The article presents the results of the experimental research, completed with numerical calculations carried out to assess the value of the deformation energy during the impact tests. By performing numerical calculations, the authors estimated the deformation energies of specimens characterised by elastoplastic properties with reinforcement (bilinear) under destructive loads. The energy of the elastic deformation of the hammer arm was estimated analytically. On the basis of the research, it was found that in the impact strength test, a large part of the recorded energy is connected with the deformation of the test device, in particular, the pendulum which undergoes bending. Moreover, the recorded impact strength of the material is not proportional to its actual impact strength.

Słowa kluczowe

EN

impact strength test; pendulum hammer; deformation energy

PL

próba udarności; młot wahadłowy; energia odkształcenia

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2019
• Tom: Vol. 13, no 4
• Strony: 214--222
• Opis fizyczny: Bibliogr. 20 poz., fig., tab.

Twórcy

autor

Godzimirski Jan

• Department of Mechatronics and Aviation, Military University of Technology, Warszawa, Poland

autor

Komorek Zenon

• Department of Advanced Materials and Technology, Military University of Technology, Warszawa, Poland

autor

Komorek Andrzej

• Department of Aviation, Polish Air Force University, Deblin, Poland
• [e-mail]

Bibliografia

• 1. Harada M., Ohya T., Iida K., Hayashi H., Hirano K., Fukuda H. Increase impact strength of biodegradable poly(lactic acid)/poly(butylene succinate) blend composites by using isocyanate as a reactive processing agent. J Appl Polym Sci, 106(3), 2007; 1813-1820. DOI: 10.1002/app.26717.
• 2. Ye Y., Chen H., Wu J., Ye L. High impact strength epoxy nanocomposites with natural nanotubes. Polymer, 48(21), 2007; 6426-6433.
• 3. Yasa E., Deckers J., Kruth J.P., Rombouts M., Luyten J. Experimental Investigation of Charpy Impact Tests on Metallic SLM parts. Innovative Developments in Design and Manufacturing: Advanced Research in Virtual and Rapid Prototyping - Proceedings of VRP4, Leiria, 2006.
• 4. Rzepa S., Bucki T., Konopík P., Džugan J., Rund M., Procházka R. Influence of specimen dimensions on ductile-to-brittle transition temperature in Charpy impact test. IOP Conference Series: Materials Science and Engineering, 179(1), 2017. DOI: 10.1088/1757-899X/179/1/012063.
• 5. Camposo Pereira A. et all, Charpy impact tenacity of epoxy matrix composites reinforced with aligned jute fibers, Journal of Materials Research and Technology, 7(4), 2018, 520-527.
• 6. Száraz Z., Hähner P., Stráská J., Ripplinger S., Effect of phase separation on tensile and Charpy impact properties of MA956 ODS steel, Materials Science and Engineering: A, 700, 2017, 425-437, https://doi.org/10.1016/j.msea.2017.06.010.
• 7. Ningning Liang, Yonghao Zhao, Jingtao Wang, Yuntian Zhu, Effect of grain structure on Charpy impact behavior of copper, Scientific Reports, 7, 2017 44783, DOI https://doi.org/10.1038/srep44783.
• 8. Adams R.D., Harris J.A. A critical assessment of the block impact test for measuring the impact strength of adhesive bonds. Int J Adhes Adhes, 16, 1996; 61-71.
• 9. Asgharifar M., Kong F., Carlson B., Kovacevic R. Dynamic analysis of adhesively bonded joint under solid projectile impact. Int J Adhes Adhes, 50, 2014; 17–31.
• 10. Yeong-Seok L., Sang-Hyuk K., Kwang-Jin L., Effect of Residual Stress on the Mechanical Properties of FSW Joints with SUS409L, Advances in Materials Science and Engineering, 2018, Article ID 9890234, 8 pages https://doi. org/10.1155/2018/9890234.
• 11. Meyers M.A. Dynamic behaviour of materials; Wiley and Sons: New York, USA, 1994.
• 12. Tanks J., Sharp S., Harris D., Charpy impact testing to assess the quality and durability of unidirectional CFRP rods, Polymer Testing Volume 51, 2016, 63-68.
• 13. Siewert T.A., Vigliotti D.P., Dirling L.B., and McCowan C.N., Performance Verification of Impact Machines for Testing Plastics, J Res Natl Inst Stand Technol, 104(6), 1999; 557–565., doi: 10.6028/jres.104.034.
• 14. Lucon E., McCowan C.N., Santoyo R.A. Instrumented Impact Testing: Influence of Machine Variables and Specimen Position - Open Report of the Belgian Nuclear Research Centre, Boeretang, 2008.
• 15. Lucon E., Santoyo R.A. A Comparative Analysis of NIST Charpy Machines and Internal Reference Materials – Report of National Institute of Standards and Technology U.S. Department of Commerce, Boulder, USA, 2016. DOI: http://dx.doi. org/10.6028/NIST.IR.8145.
• 16. Kutz M. (Ed.) Mechanical Engineers’ Handbook; Wiley and Sons: Hoboken, USA, 2015.
• 17. Ashby M.F., Jones D.R.H. Engineering Materials 1. An Introduction to Properties, Applications and Design; Elsevier: Oxford, Great Britain, 2005.
• 18. Moćko W., Janiszewski J., Radziejewska J., Grązka M. Analysis of deformation history and damage initiation for 6082-T6 aluminium alloy loaded at classic and symmetric Taylor impact test conditions, International Journal of Impact Engineering, 75, 2015, 203-213.
• 19. Follasbee P.S., Kocks U.F. A Constitutive Description of Deformation of Copper Based on the Use of Mechanical Threshold Stress as an Internal State Variable, Acta Metall., 36,1988: 81-93.
• 20. Manahan M.P., Stonesifer R.B., Siewert T.A., McCowan C. N., and Vigliotti D.P., Observations on differences between the energy determined using an instrumented striker and dial/encoder energy, European Structural Integrity Society, 30, 2002, 229-236.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).