Mechanical properties of explosives under high deformation loading conditions

Tasker, D.G.; Dick, Richard D.; Wilson, William H.

doi:10.1063/1.55565

Cited by 8 publications

(9 citation statements)

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“…The full derivation of the data reduction used to calculate the strain rate and stress in the specimen, as functions of time, can be found in references (Tasker et al 1997(Tasker et al , 1998Gray III 2002). In order to make representative measurements of material properties, it is necessary that the specimen achieves mechanical equilibrium during the experiment, and this is sometimes assumed as it makes the strain rate calculation more straightforward (Gray III 2002).…”

Section: Experimental Set-upmentioning

confidence: 99%

“…The piston can be driven at speeds up to ∼2 ms −1 ; however, the inertia of the LVDTs limits displacement, and thus strain accuracy at strain rates above, typically, ∼50 s −1 , although force, and therefore stress, are still accurately recorded at these rates. Compression experiments at intermediate strain rates (10 3 -10 4 ) were conducted using two split Hopkinson pressure bars (SHPB) (Tasker et al 1998;Gray III 2002), a schematic diagram of which can be seen in Fig. 1.…”

Section: Experimental Set-upmentioning

confidence: 99%

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Mechanical properties of Epon 826/DEA epoxy

Jordan

Foley

Siviour

2008

Mech Time-Depend Mater

122

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Section: Experimental Set-upmentioning

confidence: 99%

Section: Experimental Set-upmentioning

confidence: 99%

Mechanical properties of Epon 826/DEA epoxy

Jordan

Foley

Siviour

2008

Mech Time-Depend Mater

122

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“…(i) Externally applied constraints: strain rate and temperature A large number of studies have looked at the effect of the externally applied strain rate and temperature on the mechanical properties of various different PBXs, measured using quasi-static devices as well as the split Hopkinson pressure bar (SHPB; Hoge 1967;Funk et al 1996;Gray et al 1998Idar et al 1998;John et al 1998;Tasker et al 1998;Blumenthal et al 2000;John & Alamo 2000;Joshi & Lee 2001Balzer et al 2004;Siviour et al 2004a,b;Williamson et al 2004).…”

Section: (B ) Deformation Properties Of Pbxsmentioning

confidence: 99%

High strain rate properties of a polymer-bonded sugar: their dependence on applied and internal constraints

et al. 2008

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This paper describes research performed on a polymer-bonded sugar (PBS) consisting of 66% caster sugar in a hydroxyl-terminated polybutadiene (HTPB) binder The mechanical response of the PBS and pure HTPB to applied loading at a strain rate of approximately 2000 s K1 at temperatures from K80 to C228C is presented. The materials were also characterized using dynamic mechanical analysis, X-ray tomography and quasi-static loading. These measurements are required for the development of intermediate strain rate constitutive models of polymer-bonded explosives, for which PBSs are a commonly used mechanical simulant.The current constitutive modelling suffers from a lack of experimental data on wellcharacterized composites and binders, especially at intermediate strain rates. This is particularly important for understanding the effects of mixing two materials. Applications of such modelling include explosive safety and fundamental understanding of the various deformation mechanisms. In this paper, the dependences of strength and deformation mechanism on temperature, and, in particular, the glass transition temperature of the binder, are shown. Physical damage plays an important role; X-ray tomography scans support debonding as the primary form of damage during roomtemperature deformation. These results are in agreement with previous investigations and are discussed in this context.

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“…Compression experiments at intermediate strain rates (10 3 e 10 4 ) were conducted using two split Hopkinson pressure bars (SHPB) [41,42], a schematic diagram of which can be seen in Fig. 1.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…[41,42]. In order to make representative measurements of material properties, it is necessary that the specimen achieves mechanical equilibrium during the experiment, and this is sometimes assumed as it makes the strain rate calculation more straightforward [41].…”

Section: Experimental Set-upmentioning

confidence: 99%