LI Yixiao, WANG Shengjie. Simulation of hypervelocity impact by the material point method coupled with a new equation of state[J]. Explosion And Shock Waves, 2019, 39(10): 104201. doi: 10.11883/bzycj-2018-0261
Citation:
LI Yixiao, WANG Shengjie. Simulation of hypervelocity impact by the material point method coupled with a new equation of state[J]. Explosion And Shock Waves, 2019, 39(10): 104201. doi: 10.11883/bzycj-2018-0261
LI Yixiao, WANG Shengjie. Simulation of hypervelocity impact by the material point method coupled with a new equation of state[J]. Explosion And Shock Waves, 2019, 39(10): 104201. doi: 10.11883/bzycj-2018-0261
Citation:
LI Yixiao, WANG Shengjie. Simulation of hypervelocity impact by the material point method coupled with a new equation of state[J]. Explosion And Shock Waves, 2019, 39(10): 104201. doi: 10.11883/bzycj-2018-0261
In the numerical simulation of hypervelocity impact problems, the equation of state (EOS) is used to calculate the pressure of the material. In order to simulate the hypervelocity impact problems more accurately, a new EOS which has a clear expression and the ability to deal with the phase transformation, is established based on the Grover scaling-law EOS and the molecular dynamics (MD) method. The MD method was used to calculate the cold energy and the cold pressure of the material. In this paper, all numerical results are achieved through a cylindrical-coordinate material point method (MPM) calculating program. By comparing the numerical results with the experimental result, the shape and size of the debris cloud calculated with the new EOS are both more similar to the experimental result than the ones calculated with the traditional equations of state. The effectiveness of the new EOS is proven. The new EOS is valuable in the numerical research on hypervelocity impact problems.
LIU Menglong, WANG Qiang, ZHANG Qingming, et al. Characterizing hypervelocity(>2.5 km/s)-impact-engendered damage in shielding structures using in-situ acoustic emission: simulation and experiment [J]. International Journal of Impact Engineering, 2018, 111: 273–284. DOI: 10.1016/j.ijimpeng.2017.10.004.
HIERMAIER S J. Structures under crash and impact [M]. Berlin: Springer Press, 2008:72.
[8]
SULSKY D, SCHREYER H L. Axisymmetric form of the material point method with application to upsetting and Taylor impact problems [J]. Computer Methods in Applied Mechanics and Engineering, 1996, 139(1/2/3/4): 409–429. DOI: 10.1016/s0045-7825(96)01091-2.
[9]
MA X, ZHANG D Z, GIGUERE P T, et al. Axisymmetric computation of Taylor cylinder impacts of ductile and brittle materials using original and dual domain material point methods [J]. International Journal of Impact Engineering, 2013, 54: 96–104. DOI: 10.1016/j.ijimpeng.2012.11.001.
SATO A. Introduction to practice of molecular simulation [M]. Amsterdam: Elsevier Press, 2011: 1.
[12]
CAI J, YE Y Y. Simple analytical embedded-atom-potential model including a long-range force for fcc metals and their alloys [J]. Physical Review, 1996, 54(12): 8398–8410. DOI: 10.1103/PhysRevB.54.8398.
[13]
RAPAPORT D C. The art of molecular dynamics simulation [M]. 2nd ed. Cambridge: Cambridge University Press, 2004.
[14]
ROYCE E B. GRAY: a three-phase equation of state for metals: UCRL-51121 [R]. USA: Lawrence Livermore Lab, 1971.
[15]
PIEKUTOWSKI A J. Formation and description of debris clouds produced by hypervelocity impact: NASA contractor report 4707 [R]. USA: NASA, 1996.
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