Molecular dynamics nanoindentation simulation of an energetic material

Molecular dynamics simulation approach is used to study nanoindentation of the (100) crystal surface of cyclotrimethylenetrintramine (RDX) by a diamond indenter. The indenter and substrate atoms interact via reactive force fields. Nanoindentation causes significant heating of the RDX substrate in the proximity of the indenter, resulting in the release of molecular fragments and subsequent “walking” motion of these molecules on the indenter surfaces.

[1]  A. V. van Duin,et al.  Shock waves in high-energy materials: the initial chemical events in nitramine RDX. , 2003, Physical review letters.

[2]  Terry R. Gibbs,et al.  LASL explosive property data , 1980 .

[3]  R. Armstrong Dislocation Mechanisms for Shock-Induced Hot Spots , 1995 .

[4]  Ludwig Bartels,et al.  Unidirectional adsorbate motion on a high-symmetry surface: "walking" molecules can stay the course. , 2005, Physical review letters.

[5]  P. J. Halfpenny,et al.  Dislocation configurations in single crystals of pentaerythritol tetranitrate and cyclotrimethylene trinitramine , 1983 .

[6]  C. S. Coffey,et al.  Heating in crystalline solids due to rapid deformation , 1986 .

[7]  A. V. Duin,et al.  ReaxFF: A Reactive Force Field for Hydrocarbons , 2001 .

[8]  W. L. Elban,et al.  Investigation of hot spot characteristics in energetic crystals , 2002 .

[9]  T. Brill Decomposition, combustion, and detonation chemistry of energetic materials : symposium held November 27-30, 1995, Boston, Massachusetts, U.S.A. , 1996 .

[10]  J. Hagan,et al.  Fracture surface energies of high explosives PETN and RDX , 1977 .

[11]  W. L. Elban,et al.  Cracking at hardness nicro-indentations in RDX explosive and MgO single crystals , 1989 .

[12]  J. Gilman,et al.  Structure and Properties of Energetic Materials , 1992 .

[13]  P. J. Halfpenny,et al.  Dislocation slip systems in pentaerythritol tetranitrate (PETN) and cyclotrimethylene trinitramine (RDX) , 1992, Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences.