Steel and Composite Structures

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Numerical calculation and test of the composite materials under dynamic loading

  • Liu, Fei (Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University) ;
  • Li, Lianghui (College of Energy & Mining, China University of Mining & Technology)
  • Received : 2020.01.13
  • Accepted : 2020.12.10
  • Published : 2021.01.10
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Abstract

Due to the complex geological conditions, a large number of high quality coal seams was buried in the western of China which cannot be mining in open-pit methods. The dynamic properties of that coal cannot be studied easily in real site for the complex working condition. The compound coal blocks made on the basis of the real situation were studied in the laboratory. The physical and mechanical properties of the compound coal blocks and the raw coal were contrasted by using the UCS tests. The results show that the compound coal blocks made by mixing coal powder, cement and water in proportion of 2.5:2:1 are the closest to that of standard raw coal. Then the propagation of strain waves and crushing effects on the coal were studied in the compound coal blocks by using the super dynamic strain test system and the numerical calculated method of ANSYS/LS-DYNA. The results show that the diameter of the crushing zone in the compound coal blocks was similar to that in the numerical results. The fractures distribution in laboratory tests also has a similar trend to the calculation results. The measured strain waves at the distance of 50 cm, 100 cm, and 150 cm from the center of the charge are mainly concerned at -1.0×104 με and have a similar trend as that in the numerical simulation.

Keywords

Acknowledgement

The authors thank the supports from the Natural Science Foundation of China (No.51827901).

References

  1. Ananthi, G., et al. (2019), "Testing, simulation and design of back-to-back built-up cold-formed steel unequal angle sections under axial compression", Steel Compos. Struct., 33(4), 595-614. https://doi.org/10.12989/scs.2019.33.4.595.
  2. Ashtari, M., et al. (2019), "Evaluation of the single compressive strength test in estimating uniaxial compressive and Brazilian tensile strengths and elastic modulus of marlstone", Engineering Geology, 248, 256-266. https://doi.org/10.1016/j.enggeo.2018.12.005.
  3. Barbosa, R.A., et al. (2018), "Influence of alkali-silica reaction and crack orientation on the uniaxial compressive strength of concrete cores from slab bridges", Constr. Build. Mater., 176, 440-451. https://doi.org/10.1016/j.conbuildmat.2018.03.096.
  4. Behrouz, K. and Maziar, J. (2019), "A new size-dependent shear deformation theory for wave propagation analysis of triclinic nanobeams", Steel Compos. Struct., 32(2), 213-223. https://doi.org/10.12989/scs.2019.32.2.213.
  5. Dalin, X., et al. (2013), "JWL equation of state parameters prediction of RDX-based aluminized explosive based on KHT code", Transactions of Beijing Institute of Technology, 33(3), 239-243. https://doi.org/10.15918/j.tbit1001-0645.2013.03.003.
  6. Fei, L., et al. (2018), "Test and analysis of blast wave in mortar text block", Int. J. Rcok Mech. Mining Sci., 108, 80-85. https://doi.org/10.1016/j.ijrmms.2018.06.003.
  7. Fei, L., et al. (2019), "Influence of explosives distribution on coal fragmentation in top-coal caving mining", Geomech. Eng., 18(2), 111-119. https://doi.org/10.12989/gae.2019.18.2.111.
  8. Jalali, S.H., et al. (2019), "Predicting of uniaxial compressive strength of some igneous and metamorphic rocks by block punch index and cylindrical punch index tests", Int. J. Rock Mech. Mining Sci., 119, 72-80. https://doi.org/10.1016/j.ijrmms.2019.04.013.
  9. Kury, J.W., et al. (1965), "Metal Acceleration by Chemical Explosives", Fourth Detonation Symposium, 3-13.
  10. Lee, E.L., Hornig, H.C. and Kury, J.W. (1968), Adiabatic Expansion of High Explosive Detonation Products, Report UCRL-50422, University of California, Lawrence Radiation Laboratory, Livermore, CA, USA.
  11. Li, D., et al. (2014), "Numerical simulation of detonation parameters for PETN, RDX and HMX explosives", Explosion and Shock Waves, 25(4), 325-329. https://doi.org/10.1360/biodiv.050084.
  12. Mousavi, E., Cheshomi, A. and Ashtari, M. (2019), "Estimating elasticity modulus and uniaxial compressive strength of sandstone using indentation test", J. Petroleum Sci. Eng., 169, 157-166. https://doi.org/10.1016/j.petrol.2018.05.056.
  13. Rao, R. and Sasmal, S. (2019), "Detection of flaw in steel anchor-concrete composite using high-frequency wave characteristics", Steel Compos. Struct., 31(4), 341-359. https://doi.org/10.12989/scs.2019.34.1.341.
  14. Roy, K., Lau, H.H. and Lim, J.B.P. (2019), "Finite element modelling of back-to-back built-up cold-formed stainless-steel lipped channels under axial compression", Steel Compos. Struct., 33(1), 37-66. https://doi.org/10.12989/scs.2019.33.1.037.
  15. Shariati, M., et al. (2019), "Numerical study on the structural performance of corrugated low yield point steel plate shear walls with circular openings", Steel Compos. Struct., 33(4), 569-581. https://doi.org/10.12989/scs.2019.33.4.569.
  16. Wang, J., Liu, F. and Zhang, J. (2019), "Investigation on the propagation mechanism of explosion stress wave in nderground mining", Geomech. Eng., 17(3), 295-305. https://doi.org/10.12989/gae.2019.17.3.295.
  17. Wang, X., et al. (2016), "Power capability and parameters of JWL equation of state for RDX-based PBX", Explosion and Shock Waves, 36(2), 242-247. https://doi.org/10.11883/1001-1455(2016)02-0242-06.
  18. Yang, H., et al. (2019), "Intelligent design of retaining wall structures under dynamic conditions", Steel Compos. Struct., 31(6), 629-640. https://doi.org/10.12989/scs.2019.31.6.629.
  19. Zhou, Y. and Gao, P. (2012), "Analysis on hydrological features of No.4 minefield in jiangcang mining area of Qinghai - Tibet plateau", Coal Sci. Technol., 40(7), 104-111. https://doi.org/10.13199/j.cst.2012.07.107.zhouym.003.