Failure mechanism of woven natural silk/epoxy rectangular composite tubes under axial quasi-static crushing test using trigger mechanism

Journal article

Authors / Editors

Ude, Albert

Research Areas

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Publication Details

Author list: Eshkoor RA, Ude AU, Oshkovr SA, Sulong AB, Zulkifli R, Ariffin AK, Azhari CH

Publisher: Elsevier

Place: OXFORD

Publication year: 2014

Journal: International Journal of Impact Engineering (0734-743X)

Journal acronym: INT J IMPACT ENG

Volume number: 64

Start page: 53

End page: 61

Number of pages: 9

ISSN: 0734-743X

eISSN: 1879-3509

Languages: English-Great Britain (EN-GB)

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Abstract

This study investigates the energy absorption response of rectangular woven natural silk/epoxy composite tubes when subjected to an axial quasi-static crushing test using a trigger mechanism. The resulting deformation morphology of each failure region was captured using high resolution photography. The rectangular composite tubes were prepared through the hand lay-up technique, in which 24 layers of silk fabric were used, each with a thickness of 3.4 mm and tube lengths of 50, 80, and 120 mm. The parameters measured were peak load, energy absorption, and specific energy absorption as functions of the tube lengths. Specific energy absorption values decreased with increased length of the composite specimen, whereas total energy absorption increased with the increased length of the composite specimen. The deformation morphology showed that the failure mechanism proceeded in two stages, namely, (i) onset of tear and (ii) propagation of tear, which included progressive buckling and delamination. The composite tubes only exhibited progressive but not catastrophic failure. (C) 2013 Elsevier Ltd. All rights reserved.

Keywords

Energy absorption, Natural silk composite, Progressive failure, Trigger mechanism

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