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

Siviour, Clive R, Laity, Peter R., Proud, William G, Field, J.E., Porter, D., Church, P.D., Gould, P. and Huntingdon-Thresher, W (2008) High strain rate properties of a polymer-bonded sugar: their dependence on applied and internal constraints. Proceedings of the Royal Society, A, 464 (2093). pp. 1229-1255. ISSN 1364-5021

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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-1 at temperatures from -80 to +22°C 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.

Item Type: Article
Subjects: Q Science > Q Science (General)
Schools: School of Applied Sciences
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Depositing User: Peter Laity
Date Deposited: 15 May 2012 14:55
Last Modified: 05 Apr 2018 16:45


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