Second-order elastic constants of pentaerythritol tetranitrate and cyclotrimethylene trinitramine using impulsive stimulated thermal scattering

Abstract

Impulsive stimulated thermal scattering (ISTS) was used to determine the complete set of second-order elastic constants for pentaerythritol tetranitrate (PETN) and cyclotrimethylene trinitramine (RDX) single crystals. Despite the weak scattering efficiency of these materials, excellent signal quality was obtained by using an optical heterodyne detection approach. The elastic constants for PETN agree well with previous values obtained from ultrasonic velocity measurements. The elastic constants for RDX are consistent with previous values obtained from ultrasonic velocity measurements and from resonant ultrasound spectroscopy, but show significant differences with values obtained from Brillouin scattering data. The present results demonstrate that the ISTS method, with optical heterodyne detection, provides a useful and accurate approach for determining the elastic constants of energetic crystals.

Theoretical Predictions of Lattice Parameters and Mechanical Properties of Pentaerythritol Tetranitrate under the Temperature and Pressure by Molecular Dynamics Simulations

“…In the past decades, many researches on the equation of state (EOS) and mechanical properties have been done for PETN by theory and experiments [1][2][3][4][5][6][7][8][9][10]. Accurate EOS and elastic constants are of particular importance because they provide an excellent opportunity to link the microscopic and macroscopic properties of PETN on atomic and molecular scale [1].…”

“…The calculated elastic constants are in agreement with experimental data. All the data of elastic constants above are obtained at ambient condition [9][10][11]. The elastic constants of PETN under high pressure and temperature are scarce.…”

“…Winey and Gupta have used ultrasonic measurements to determine the elastic constants of PETN [9]. Subsequently, Sun have measured elastic constants of PETN using impulsive stimulated thermal scattering [10]. Theoretically, the elastic constants (C 11 , C 22 , and C 33 ) have been obtained by first-principles DFT calculations [1].…”

Thermoelastic Model for Impulsive Stimulated Scattering Monitoring the Evolution from Capillary to Rayleigh Type Wave Propagation on the Surface of Viscoelastic Materials Throughout the Glass Transition

“…ISS is a technique that has proven its value for the thermal and elastic characterization of bulk solids [26], thin coatings [27], intermediate layers in multilayered systems [28], bulk fluids [4], fluid-solid interface [6], and the free liquid surface [11][12][13]29]. In the employed ISS scheme shown in Fig.…”

Temperature Dependent Elasticity of a Ni2MnGa Film as Measured by Impulsive Stimulated Scattering

“…It has proven to be an useful tool in the characterization of bulk solids [1,2], free liquid surfaces [3], thin films [4] and multilayered structures [5]. A more extensive review of the technique, applications and the relationship of ISS to other laser ultrasonic methods, e.g.…”