Experimental study of anisotropic constitutive behavior of β-HMX crystals via nanoindentation and small-scale dynamic impact

For energetic crystals such as HMX, the sensitivity of the material to shock, the possibility of initiation, and the subsequent reaction is known to be controlled by processes occurring at the crystal level. The anisotropic nature of β-HMX can be critical in determining the performance of HMX based...

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Bibliographic Details
Published in:SN applied sciences 2021-12, Vol.3 (12), p.875-11, Article 875
Main Authors: Olokun, Ayotomi, Dillard, Tyler, Dhiman, Abhijeet, Tomar, Vikas
Format: Article
Language:English
Subjects:
Anisotropy
Applied and Technical Physics
Chemistry/Food Science
Crystals
Deformation
Earth Sciences
Elastic anisotropy
Energetic materials
Engineering
Environment
Experimental methods
Experiments
Explosives
Hardness
HMX
Material properties
Materials Science
Mechanical properties
Morphology
Nanoindentation
Parameters
PBX (explosives)
Polymers
Research Article
Research methodology
Single crystals
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Summary:For energetic crystals such as HMX, the sensitivity of the material to shock, the possibility of initiation, and the subsequent reaction is known to be controlled by processes occurring at the crystal level. The anisotropic nature of β-HMX can be critical in determining the performance of HMX based polymer bonded explosives, which are widely used across multiple industries as propellant or explosives. In this work, we experimentally obtain constitutive parameters for characterizing the response of multiple crystalline planes of β-HMX crystals to external loading. Nanoindentation and small-scale dynamic impact experiments were performed on multiple planes of β-HMX crystals to comparatively measure the indentation moduli in multiple orientation directions. Anisotropic material behavior, involving constitutive elastic and non-elastic parameters, was measured and studied. Findings regarding material properties for the (100), (010), (001), {110}, and {011} planes of β-HMX are presented and compared with literature data.
ISSN:2523-3963
2523-3971
DOI:10.1007/s42452-021-04862-4