Shock compression of solids

Davison, Lee; Graham, R. A.

doi:10.1016/0370-1573(79)90026-7

Cited by 392 publications

(148 citation statements)

References 447 publications

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“…The micromechanics of the response of polymers to weak shock can be described in terms of the packing of the polymer chains at distances of five to ten times these dimensions. While the response of fully dense metals or ceramics in the weak shock regime is dominated in the first moments of load by the creation of localised regions to accommodate macroscopic strain, polymers respond by compressing against the weaker inter-chain Van der Waals forces or the lower density of cross-links [53,70]. Microscale packing dominates behaviour and with approximately inverse square dependence on chain separation response is sensitive to conformation once compression begins [31,86,87].…”

Section: Discussionmentioning

confidence: 99%

“…However, the first is related to the bulk sound speed (and in metals such as copper can be shown to be so) while the second, S, reflects the rate of change of compressibility of the material with pressure (dK/dP for a material deforming hydrodynamically; see derivation in [53]). In materials that change phase, there is generally a transition state and linear behaviour in regimes either side of the transformation state.…”

Section: Shock Compressionmentioning

confidence: 99%

“…In materials that change phase, there is generally a transition state and linear behaviour in regimes either side of the transformation state. In this case S is fit to collected data either side of this point and generally takes different values either side of the transformation state (see [53] for example). Unlike in simple metals, a bulk sound speed, c 0 , calculated from ultrasonic measurements of c L and c s does not correspond to the intercept of the plot of Eq.…”

Section: Shock Compressionmentioning

confidence: 99%

See 2 more Smart Citations

On the Shock Response of Polymers to Extreme Loading

Bourne

2016

J. dynamic behavior mater.

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This paper reviews polymer response to shock and discusses how plastics behave differently depending on the strain rate applied. The author uses polyethylene, polytetrafluroethylene, polycarbonate and epoxy as example materials. It is suggested that there are two distinct regimes of polymer response corresponding to low and high shock pressures (weak and strong shock regimes) that must be considered separately. Above a high pressure threshold it is proposed that polymers homogenize to carbon-containing structures which behave similarly. Further, the yield stress of a polymer volume element asymptotes to the theoretical strength of the material as volume shrinks to zero. It is suggested that these two behaviours reflect the same physics and this feature is common to the condition identified earlier for crystalline materials.

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Section: Discussionmentioning

confidence: 99%

Section: Shock Compressionmentioning

confidence: 99%

Section: Shock Compressionmentioning

confidence: 99%

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On the Shock Response of Polymers to Extreme Loading

Bourne

2016

J. dynamic behavior mater.

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“…Our purpose is to compare a computational construction of the Hugoniot for this material with that reported experimentally in Marsh (1980). The Hugoniot of a material is the locus of thermodynamic states that is generated by the passage of a family of steady state shock waves of varying strength (Zel'Dovich and Raizer, 1967;Davison and Graham, 1979;Graham, 1993). Given the initial state and the shock velocity, the final state is uniquely determined.…”

Section: Experimental Datamentioning

confidence: 99%

Statistical Validation of Engineering and Scientific Models: A Maximum Likelihood Based Metric

Hills¹,

Trucano²

2002

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Two major issues associated with model validation are addressed here. First, we present a maximum likelihood approach to define and evaluate a model validation metric. The advantage of this approach is it is more easily applied to nonlinear problems than the methods presented earlier by Trucano (1999, 2001); the method is based on optimization for which software packages are readily available; and the method can more easily be extended to handle measurement uncertainty and prediction uncertainty with different probability structures. Several examples are presented utilizing this metric. We show conditions under which this approach reduces to the approach developed previously by Hills and Trucano (2001).Secondly, we expand our earlier discussions Trucano, 1999, 2001) on the impact of multivariate correlation and the effect of this on model validation metrics. We show that ignoring correlation in multivariate data can lead to misleading results, such as rejecting a good model when sufficient evidence to do so is not available.

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“…Although shock wave propagation in polymers has been well studied [1][2][3][4][5], the light emission from shocked polymers has not.…”

Section: Introductionmentioning

confidence: 99%

Free-surface light emission from shocked Teflon

Gallagher

Yang

Ahrens

1994

AIP Conference Proceedings

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Shock initiated light emission experiments were performed on Teflon shock loaded to pressures up to ~17 GPa. Radiances up to 600 x 106W 9 m-2/(ster 9 rim), were measured over a range of 390 to 820 nm. We have measured the spectra of light emitted upon reflection of the shock at the free surface and observed it to be distinctly non-thermal in nature. The light emission appears to result from bond destruction such as observed in shock recovery experiments on Teflon and in quasistatic experiments conducted on other polymers.

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Shock compression of solids

Cited by 392 publications

References 447 publications

On the Shock Response of Polymers to Extreme Loading

On the Shock Response of Polymers to Extreme Loading

Statistical Validation of Engineering and Scientific Models: A Maximum Likelihood Based Metric

Free-surface light emission from shocked Teflon

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