Structural Engineering and Mechanics

  • 제19권6호
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  • Pages.603-618
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  • 2005
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Adaptation of impactor for the split Hopkinson pressure bar in characterizing concrete at medium strain rate

  • Zhao, Pengjun (Centre for Protective Technology, National University of Singapore, Department of Civil Engineering) ;
  • Lok, Tat-Seng (School of Civil and Environmental Engineering, Nanyang Technological University)
  • 투고 : 2004.03.18
  • 심사 : 2005.01.24
  • 발행 : 2005.04.20
⟨ 이전 논문 다음 논문 ⟩

초록

The split Hopkinson pressure bar (SHPB) technique is widely used to characterize the dynamic mechanical response of engineering materials at high strain rates. In this paper, attendant problems associated with testing 70 mm diameter concrete specimens are considered, analysed and resolved. An adaptation of a conventional solid circular striker bar, as a means of achieving reliable and repeatable SHPB tests, is then proposed. In the analysis, a pseudo one-dimensional model is used to analyse wave propagation in a non-uniform striker bar. The stress history of the incident wave is then obtained by using the finite difference method. Comparison was made between incident waves determined from the simplified model, finite element solution and experimental data. The results show that the simplified method is adequate for designing striker bar shapes to overcome difficulties commonly encountered in SHPB tests. Using two specifically designed striker bars, tests were conducted on 70 mm diameter steel fibre reinforced concrete specimens. The results are presented in the paper.

키워드

참고문헌

  1. Bertholf, L.D. and Kames, C.H. (1975), 'Two-dimensional analysis of the split - Hopkinson pressure bar system', J. of the Mechanics and Physics of Solids, 23, 1-19 https://doi.org/10.1016/0022-5096(75)90008-3
  2. Chen, W, Zhang, B. and Forrestal, M.J. (1998), 'A split Hopkinson bar technique for low-impedance materials', Experimental Mechanics, 39(2), 81-85 https://doi.org/10.1007/BF02331109
  3. Donze, F.V., Magnier, S.A, Daudeville, L., Maritotti, C. and Davenne, L. (1999), ''Numerical study of compressive behavior of concrete at high strain rates', J. Eng. Mech., 125(10), 1154-1163 https://doi.org/10.1061/(ASCE)0733-9399(1999)125:10(1154)
  4. Follansbee, P.S. and Frantz, C. (1983), 'Wave propagation in the split Hopkinson pressure bar', J. Eng Mater. Tech., 105, 61-66 https://doi.org/10.1115/1.3225620
  5. Frew, D.J., Forrestal, M.J. and Chen, W. (2002), 'Pulse shaping techniques for testing brittle materials in a split Hopkinson pressure bar', Experimental Mechanics, 42(1), 93-106 https://doi.org/10.1007/BF02411056
  6. Kolsky, H. (1949), 'An investigation of mechanical properties of materials at very high rates of loading', Proc. of the Physics Society of London, Series B62, 676-700
  7. Li, X.B., Lok, T.S., Zhao, J. and Zhao, P.J. (2000), 'Oscillation elimination in the Hopkinson bar apparatus and resultant complete dynamic stress-strain curves for rocks', Int. J. Rock Mechanics and Mining Sciences, 37, 1055-1060 https://doi.org/10.1016/S1365-1609(00)00037-X
  8. Lok, T.S., Zhao, P.J., Li, X.B., Liu, D.S. and Lim, C.H. (2001), 'Effect of shaped impactor on the loading waveform in a large diameter split Hopkinson pressure bar', Proc. of 10h Int. Symp. on Int. of the Effects of Munitions with Structures, San Diego, USA, CD-ROM (Session:Structures), DTRA(USA) & Streitkrafteamt Abteilung Infrastruktur
  9. Lok, T.S., Li, X., Liu, D. and Zhao, P.J. (2002), 'Testing and response of large diameter brittle materials subjected to high strain rate', J. Mat. Civil Engg, ASCE, 14(3), 262-269 https://doi.org/10.1061/(ASCE)0899-1561(2002)14:3(262)
  10. Meng, H. and Li, Q.M. (2003), 'Correlation between the accuracy of a SHPB test and the stress uniformity based on numerical experiments', Int. J. Impact Eng., 28, 537-555 https://doi.org/10.1016/S0734-743X(02)00073-8
  11. Ninan, L., Tsai, J. and Sun, C.T. (2001), 'Use of split Hopkinson pressure bar for testing off-axis composites', Int. J. Impact Eng., 25, 291-313 https://doi.org/10.1016/S0734-743X(00)00039-7
  12. Ross, C.A., Thompson, P.Y. and Tedesco, J.W. (1989), 'Split Hopkinson pressure bar tests on concrete and mortar in tension and compression', ACI Mater. J., 86, 475-481
  13. Tedesco, J.W. and Ross, C.A. (1989), 'Strain-rate dependent constitutive equations for concrete', J. Pressure Vessel Tech., 120, 398-405
  14. Zhao, P.J, Lok, T.S., Li, X.B. and Lim, C.H. (2001), 'Behaviour of steel fibre reinforced concrete under dynamic load', Proc. of 4th Asia-Pacific Conf. on Shock and Impact Loads on Structures, Singapore, November 2001, 572-580
  15. Zheng, S., Haussler-Combe, U. and Eibl, J. (1999), 'New approach to strain rate sensitivity of concrete in compression', J. Eng. Mech., 125(12), 1403-1410 https://doi.org/10.1061/(ASCE)0733-9399(1999)125:12(1403)

피인용 문헌

  1. Determination of plastic concrete behavior at different strain rates to determine Cowper-Symonds constant for numerical modeling vol.26, pp.3, 2005, https://doi.org/10.12989/cac.2020.26.3.227
  2. Constitutive equation determination and dynamic numerical modelling of the compression deformation of concrete vol.57, pp.2, 2021, https://doi.org/10.1111/str.12377