Temperature and strain rate effects on the mechanical properties of a polymer-bonded explosive

Walley, S. M.; Taylor, Nicholas; Williamson, David M.

doi:10.1140/epjst/e2018-00060-6

Cited by 9 publications

(9 citation statements)

References 54 publications

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“…Verolme, E., Van der Voort, M., Weerhejim, J., Koh, Y., & Kang, K. tried to extrapolate backwards to see if damage on a post-blast scene can be applied to determine the strength of the original explosion [ 966 ].…”

Section: Other (Safety Definitions Etc)mentioning

confidence: 99%

Interpol review of detection and characterization of explosives and explosives residues 2016-2019

Klapec

Czarnopys

Pannuto

2020

Forensic Science International: Synergy

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Section: Other (Safety Definitions Etc)mentioning

confidence: 99%

Interpol review of detection and characterization of explosives and explosives residues 2016-2019

Klapec

Czarnopys

Pannuto

2020

Forensic Science International: Synergy

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“…The relationship among flow stress, strain and temperature of the four PTFE/Al/W materials at a strain rate of 4000 s À 1 are shown in Figure 16. The flow stress decreases with increasing temperature, and it is common in the polymer-based composites [26][27], which indicates the thermal softening effect plays an important role in the Johnson-Cook constitutive modeling.…”

Section: Full Papermentioning

confidence: 99%

Characterization of the Dynamic Response and Constitutive Behavior of PTFE/Al/W Reactive Materials

Zhang

Wang

2020

Propellants Explo Pyrotec

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In this study, the static and dynamic mechanical behaviors of four types of PTFE/Al/W reactive materials with different component mass ratios were studied. The mechanical properties of reactive materials at elevated strain rates and temperatures were tested by quasi-static compression and Split Hopkinson Pressure Bar (SHPB). Parametric study on material properties was carried out, and the Johnson-Cook constitutive constants were well determined. Based on the good agreement between the predicted and tested constitutive response, a systematic com-parison of the static and dynamic behaviors, as well as the comprehensive stress-strain relationships were conducted, regarding the strain rate and temperature effect. Microscopic fractographic analysis of the tested samples reveals the localized thermal softening effects and fiber network formation phenomenon of the matrix, which dominate the overall mechanical response of the four types of PTFE/Al/W reactive materials, and contribute to the elasto-plastic property, strain hardening, strain rate strengthening and thermal softening effects. Figure 17. Microscopic images of PTFE/Al/W material after SHPB testing at an increasing magnification (a-d).

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“…Performance and safety are the two most important aspects of an explosive. Moreover, its mechanical properties are also crucial [ 1 , 2 , 3 , 4 ]. It is usually believed that improving the mechanical properties can enhance safety [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Separate Calibration of Johnson–Cook Model for Static and Dynamic Compression of a DNAN-Based Melt-Cast Explosive

et al. 2022

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When describing the relation between the flow stress and plastic strain of a material under a wide range of strain rates and temperatures, the original Johnson–Cook model generally requires a complicated modification, resulting in a loss of simplicity and clear physical interpretation. In this paper, without modification, the original Johnson–Cook model was calibrated separately for the static and dynamic compression of a DNAN-based melt-cast explosive. The stress–strain curves for static and dynamic compression of this explosive were experimentally measured with a universal testing machine and a split-Hopkinson pressure bar, respectively. Based on the stress–strain curves, the flow stress vs. plastic strain data were extracted and used to calibrate the Johnson–Cook model. The calibration process is described. The parameters for the strain term, strain rate term, and temperature term were fitted sequentially. One set of model parameters was not able to fully describe the relationship between flow stress and plastic strain for both the static and dynamic compression of the DNAN-based melt-cast explosive. Two sets of model parameters were separately calibrated and compared for the static and dynamic compression of this explosive. The effects of the adiabatic temperature rise and the definition of the yield point on this calibration were also investigated.

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Temperature and strain rate effects on the mechanical properties of a polymer-bonded explosive

Cited by 9 publications

References 54 publications

Interpol review of detection and characterization of explosives and explosives residues 2016-2019

Interpol review of detection and characterization of explosives and explosives residues 2016-2019

Characterization of the Dynamic Response and Constitutive Behavior of PTFE/Al/W Reactive Materials

Separate Calibration of Johnson–Cook Model for Static and Dynamic Compression of a DNAN-Based Melt-Cast Explosive

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