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Title: Response of a high-strength flexible laminate to dynamic tension
Authors: Koh, C.P.
Shim, V.P.W. 
Tan, V.B.C. 
Tan, B.L.
Keywords: Ballistics
Dynamic tension
Flexible armour
Flexible laminate
Issue Date: Jun-2008
Citation: Koh, C.P., Shim, V.P.W., Tan, V.B.C., Tan, B.L. (2008-06). Response of a high-strength flexible laminate to dynamic tension. International Journal of Impact Engineering 35 (6) : 559-568. ScholarBank@NUS Repository.
Abstract: The dynamic stress-strain behaviour of the Spectra Shield® LCR (laminated composite roll) is determined from tests using a tensile split Hopkinson bar, and the experimental results indicate that it is highly strain rate sensitive. The failure strain decreases initially with strain rate up to a critical value, and rises thereafter, while the failure stress increases with strain rate to a similar value of strain rate, after which it decreases. The nature of failure of filaments is observed to change with strain rate, first becoming increasingly brittle and then returning to more ductile modes once the critical strain rate is exceeded. The increase in failure strain and stress are accounted for in terms of strain rate hardening. An explanation of the reduction in failure stress beyond the critical strain rate is proposed with respect to increasing viscoelastic hysteresis and reduction in the time available for filament alignment. © 2007 Elsevier Ltd. All rights reserved.
Source Title: International Journal of Impact Engineering
ISSN: 0734743X
DOI: 10.1016/j.ijimpeng.2007.04.010
Appears in Collections:Staff Publications

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