DOI QR코드

DOI QR Code

Numerical study of steel sandwich plates with RPF and VR cores materials under free air blast loads

  • Rashad, Mohamed (Department of Civil Engineering, University of British Columbia) ;
  • Yang, T.Y. (International Joint Research Laboratory of Earthquake Engineering, Tongji University)
  • 투고 : 2017.07.09
  • 심사 : 2017.12.03
  • 발행 : 2018.06.25

초록

One of the most important design criteria in military tunnels and armoured doors is to resist the blast loads with minimum structural weight. This can be achieved by using steel sandwich panels. In this paper, the nonlinear behaviour of steel sandwich panels, with different core materials: (1) Hollow (no core material); (2) Rigid Polyurethane Foam (RPF); and (3) Vulcanized Rubber (VR) under free air blast loads, was investigated using detailed 3D nonlinear finite element models in Ansys Autodyn. The accuracy of the finite element model proposed was verified using available experimental test data of a similar steel sandwich panel tested. The results show the developed finite element model can be reliably used to simulate the nonlinear behaviour of the steel sandwich panels under free air blast loads. The verified finite element model was used to examine the different parameters of the steel sandwich panel with different core materials. The result shows that the sandwich panel with RPF core material is more efficient than the VR sandwich panel followed by the Hollow sandwich panels. The average maximum displacement of RPF sandwich panel under different ranges of TNT charge (1 kg to 10 kg at a standoff distance of 1 m) is 49% and 53% less than the VR and Hollow sandwich panels, respectively. Detailed empirical design equations were provided to quantify the maximum deformation of the steel sandwich panels with different core materials and core thickness under a different range of blast loads. The developed equations can be used as a guide for engineer to design steel sandwich panels with RPF and VR core material under a different range of free air blast loads.

키워드

참고문헌

  1. Ansys (2007), Theory reference manual; Release 11.0, Ansys Inc.
  2. Chen, Y., Tong, Z.P., Hua, H.X., Wang, Y. and Gou, H.Y. (2009), "Experimental investigation on the dynamic response of scaled ship model with rubber sandwich coatings subjected to underwater explosion", Int. J. Impact Eng., 36(2), 318-328. https://doi.org/10.1016/j.ijimpeng.2007.12.015
  3. Fayad, H.M. (2009), "The optimum design of the tunnels armoured doors under blast effects", Ph.D. Dissertation; Military Technical College (MTC), Cairo, Egypt.
  4. Ha, J., Yi, N., Choi, J. and Kim, J. (2011), "Experimental study on hybrid CFRP-PU strengthening effect on RC panels under blast loading", J. Compos. Struct., 93, 2070-2082. https://doi.org/10.1016/j.compstruct.2011.02.014
  5. Hyde, D.W. (1991), "CONWEP-Conventional Weapons Effects Program", US Army Waterways Experiment Station; Vicksburg, MS, USA.
  6. Johnson, G.R. and Cook, W.H. (1983), "A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures", Proceedings of the 7th International Symposium on Ballistics, The Hague, The Netherlands, pp. 541-547.
  7. Lee, D.K. (David) and O'Toole, B.J. (2004), "Energy absorbing sandwich structures under blast loading", Doctoral Dissertation; Proceedings of the 8th International LS-DYNA User Conference, 8, p. 13-24.
  8. Li, X., Miao, C., Wang, Q. and Geng, Z. (2016), "Antiknock performance of interlayered high-damping-rubber blast door under thermobaric shock wave", Shock Vib., Article ID 2420893, 9 pages.
  9. Mazek, S.A. (2014), "Performance of sandwich structure strengthened by pyramid cover under blast effect", Struct. Eng. Mech., Int. J., 50(4), 471-486. https://doi.org/10.12989/sem.2014.50.4.471
  10. Mazek, S. and Mostafa, A. (2013), "Impact of a shock wave on a structure strengthened by rigid polyurethane foam", J. Struct. Eng. Mech., Int. J., 48(4), 569-585. https://doi.org/10.12989/sem.2013.48.4.569
  11. Mazek, S.A. and Mostafa, A.A. (2014), "Impact of composite materials on performance of reinforced concrete panels", Comput. Concrete, Int. J., 14(6), 767-783. https://doi.org/10.12989/cac.2014.14.6.767
  12. Mazek, S.A. and Wahab, M.A. (2015), "Impact of composite materials on buried structures performance against blast wave", J. Struct. Eng. Mech., 53(3), 589-605. https://doi.org/10.12989/sem.2015.53.3.589
  13. Mostafa, A.A., Salem, A.H., Wahab, M.A. and Mazek, S.A. (2010a), "Blast mitigation using polyurethane foam to retrofit fortified sandwich structures", Proceedings of the 8th International Conference on Civil and Architecture Engineering ICCAE, Cairo, Egypt, May.
  14. Mostafa, H.E., El-Dakhakhni, W.W. and Mekky, W.F. (2010b), "Use of reinforced rigid polyurethane foam for blast hazard mitigation", J. Reinf. Plast. Compos., 29(20), 3048-3057. https://doi.org/10.1177/0731684410363184
  15. Nurick, G.N., Langdon, G.S., Chi, Y. and Jacob, N. (2009), "Behaviour of sandwich panels subjected to intense air blast - Part 1: Experiments", Compos. Struct., 91(2009), 433-441. https://doi.org/10.1016/j.compstruct.2009.04.009
  16. Rashad, M. (2013), "Study the Behavior of Composite Sandwich Structural Panels under Explosion Using Finite Element Method", M.Sc. Thesis; Military Technical College (MTC), Cairo, Egypt.
  17. Sheikh, S.A. and Li, Y. (2007), "Design of FRP confinement for square concrete columns", Eng. Struct., 29(6), 1074-1083. https://doi.org/10.1016/j.engstruct.2006.07.016
  18. TM 5-885-1 (1986), Fundamentals of Protective Design for Conventional Weapons; Headquarters Department of the Army, Washington, DC, USA.
  19. Vinson, J.R. (2001), "Sandwich structures", Appl. Mech. Rev., 54(3), 201-214 https://doi.org/10.1115/1.3097295
  20. Wang, Y.C. and Ko, C.C. (2015), "Energy dissipation of steelpolymer composite beam-column connector", Steel Compos. Struct., Int. J., 18(5), 1161-1176. https://doi.org/10.12989/scs.2015.18.5.1161
  21. Woodfin, R.L. (2000), "Using Rigid Polyurethane Foams (RPF) for Explosive Blast Energy Absorption in Applications Such as Anti-Terrorist Defenses", Research Report; No. SAND2000-0958, Sandia National Laboratories, CA, USA.
  22. Woodfin, R.L., Faucett, D.L., Hance, B.G., Latham, A.E. and Schmidt, C.O. (1998), "Results of Experiments on Rigid Polyurethane Foam (RPF) for Protection from Mines", Research Report; No. SAND98-2278, Sandia National Laboratories, CA, USA.
  23. Xia, Z., Wang, X., Fan, H., Li, Y. and Jin, F. (2016), "Blast resistance of metallic tube-core sandwich panels", Int. J. Impact Eng., 97, 10-28. https://doi.org/10.1016/j.ijimpeng.2016.06.001
  24. Xiao, F., Chen, Y. and Hua, H. (2014), "Comparative study of the shock resistance of rubber protective coatings subjected to underwater explosion", J. Offshore Mech. Arct. Eng., 136(2), 021402-021402-12. DOI: 10.1115/1.4026670
  25. Yen, C.F., Skaggs, R. and Cheeseman, B.A. (2005), "Modeling of shock mitigation sandwich structures for blast protection", Proceedings of the 3rd International Conference on Structural Stability and Dynamics, FL, USA, June.
  26. Zhu, F. (2008), "Impulsive loading of sandwich panels with cellular cores", Ph.D. Dissertation; Swinburne University of Technology, Hawthorn, Melbourne, VIC, Australia.

피인용 문헌

  1. Vibration analysis of sandwich sector plate with porous core and functionally graded wavy carbon nanotube-reinforced layers vol.37, pp.6, 2018, https://doi.org/10.12989/scs.2020.37.6.711