skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High speed X-ray phase contrast imaging of energetic composites under dynamic compression

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4963137· OSTI ID:1373758

Fracture of crystals and subsequent frictional heating are associated with formation of hot spots in energetic composites such as polymer bonded explosives (PBXs). Traditional high speed optical imaging methods cannot be used to study the dynamic sub-surface deformation and fracture behavior of such materials due to their opaque nature. In this study, high speed synchrotron X-ray experiments are conducted to visualize the in situ deformation and fracture mechanisms in PBXs manufactured using octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) crystals and hydroxyl-terminated polybutadiene (HTPB) binder. A modified Kolsky bar apparatus was used to apply controlled dynamic compression on the PBX specimens, and a high speed synchrotron X-ray phase contrast imaging (PCI) setup was used to record the in situ deformation and failure in the specimens. The experiments show that synchrotron X-ray PCI provides a sufficient contrast between the HMX crystals and the doped binder, even at ultrafast recording rates. Under dynamic compression, most of the cracking in the crystals was observed to be due to the tensile stress generated by the diametral compression applied from the contacts between the crystals. Tensile stress driven cracking was also observed for some of the crystals due to the transverse deformation of the binder and superior bonding between the crystal and the binder. In conclusion, the obtained results are vital to develop improved understanding and to validate the macroscopic and mesoscopic numerical models for energetic composites so that eventually hot spot formation can be predicted.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Air Force Research Laboratory (AFRL), Air Force Office of Scientific Research (AFOSR)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1373758
Alternate ID(s):
OSTI ID: 1328567
Journal Information:
Applied Physics Letters, Vol. 109, Issue 13; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

References (34)

Observation of Crack Propagation in Glass Using X-ray Phase Contrast Imaging journal October 2014
Determination of the tensile strength of rock by a compression test of an irregular test piece journal May 1966
The Deformation and Fracture of Formula-HMX journal October 1982
An Investigation of the Mechanical Properties of Materials at very High Rates of Loading journal November 1949
Quasi–static studies of the deformation and failure of β –HMX based polymer bonded explosives
  • Rae, P. J.; Goldrein, H. T.; Palmer, S. J. P.
  • Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 458, Issue 2019 https://doi.org/10.1098/rspa.2001.0894
journal March 2002
Ignition Mechanisms of Explosives during Mechanical Deformation
  • Field, J. E.; Swallowe, G. M.; Heavens, S. N.
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 382, Issue 1782 https://doi.org/10.1098/rspa.1982.0099
journal July 1982
Nanoindentation of explosive polymer composites to simulate deformation and failure journal October 2012
Experiments and modeling of HMX granular explosives subjected to drop-weight impact journal January 2012
New pulverization parameter derived from indentation and dynamic compression of brittle microspheres journal October 2015
Phase-contrast imaging using polychromatic hard X-rays journal November 1996
Detection and characterization of long-pulse low-velocity impact damage in plastic bonded explosives journal May 2005
Local Deformation and Failure Mechanisms of Polymer Bonded Energetic Materials Subjected to High Strain Rate Loading journal January 2016
Rate-dependent hardening model for polymer-bonded explosives with an HTPB polymer matrix considering a wide range of strain rates journal January 2014
Study on Fracture Behaviour of a Polymer-Bonded Explosive Simulant Subjected to Uniaxial Compression Using Digital Image Correlation Method: Study on Fracture Behaviour of a PBX Simulant journal March 2012
Fracture Behaviour Investigation into a Polymer-Bonded Explosive journal May 2012
In Situ Visual Observation of Fracture Processes in Several High-Performance Fibers journal February 2015
In situ investigation of the dynamic response of energetic materials using IMPULSE at the Advanced Photon Source journal May 2014
Influence of Pressing Intensity on the Microstructure of PBX 9501 journal October 2003
In situ damage assessment using synchrotron X-rays in materials loaded by a Hopkinson bar
  • Chen, Weinong W.; Hudspeth, Matthew C.; Claus, Ben
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2015 https://doi.org/10.1098/rsta.2013.0191
journal May 2014
Growth and dislocation studies of β-HMX journal December 2014
Influence of temperature and strain rate on the mechanical behavior of PBX 9502 and Kel-F 800™ conference January 2000
Experimental assessment of fracture of individual sand particles at different loading rates journal June 2014
Hot spot ignition mechanisms for explosives journal November 1992
Deformation, Strengths and Strains to Failure of Polymer Bonded Explosives
  • Palmer, S. J. P.; Field, J. E.; Huntley, J. M.
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 440, Issue 1909 https://doi.org/10.1098/rspa.1993.0023
journal February 1993
Impact initiation of explosives and propellants via statistical crack mechanics journal June 2006
Microstructural level response of HMX–Estane polymer-bonded explosive under effects of transient stress waves journal June 2012
Measurement of the shock initiation sensitivity of low density HMX journal December 1983
High speed synchrotron x-ray phase contrast imaging of dynamic material response to split Hopkinson bar loading journal February 2013
Critical Conditions for Impact- and Shock-Induced Hot Spots in Solid Explosives journal January 1996
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Dynamic Mechanical Behavior of PBX journal February 2016
The Composition Of Polymer Composite Fracture Surfaces As Studied By Xps journal January 1995
High-Speed Study of Drop-Weight Impact Ignition of PBX 9501 Using Infrared Thermography journal January 2011
Determination of the Tensile Strength of Rock by a Compression test of an irregular test piece journal July 1967

Cited By (12)

Modeling impact-induced damage and debonding using level sets in a sharp interface Eulerian framework journal June 2018
Effects of Local Coating on Strengthening and Crack Suppression of Notched PBX Beams journal August 2019
Quantitative In Situ Studies of Dynamic Fracture in Brittle Solids Using Dynamic X-ray Phase Contrast Imaging journal September 2018
Effect of Particle Mass Fraction on the Multiscale Dynamic Failure Behavior of Particulate Polymer Composites journal March 2019
In-Situ Visualization of Tensile Failure in Additively Manufactured 316 L Stainless Steel journal July 2019
Observation of Damage During Dynamic Compression of Production and Low-Defect HMX Crystals in Sylgard® Binder Using X-Ray Phase Contrast Imaging journal October 2019
Dynamic fracture and hot-spot modeling in energetic composites journal February 2018
Effect of initial damage variability on hot-spot nucleation in energetic materials journal July 2018
Weak-shock wave propagation in polymer-based particulate composites journal April 2019
The effect of crystal anisotropy and plastic response on the dynamic fracture of energetic materials journal October 2019
A molecular dynamics simulation study of thermal conductivity anisotropy in β -octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine ( β -HMX) journal January 2020
In situ observation of void evolution in 1,3,5-triamino-2,4,6-trinitrobenzene under compression by synchrotron radiation X-ray nano-computed tomography journal January 2020