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

R. A. Eshkoor, A. U. Ude, S. A. Oshkovr, Abu Bakar Sulong, Rozli Zulkifli, Ahmad Kamal Ariffin Mohd Ihsan, Che Husna Azhari

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35 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)53-61
Number of pages9
JournalInternational Journal of Impact Engineering
Volume64
DOIs
Publication statusPublished - 2014

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Energy absorption
Crushing
Silk
Composite materials
Photography
Delamination
Buckling
Crack propagation

Keywords

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

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Ocean Engineering
  • Automotive Engineering
  • Aerospace Engineering
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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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.",
keywords = "Energy absorption, Natural silk composite, Progressive failure, Trigger mechanism",
author = "Eshkoor, {R. A.} and Ude, {A. U.} and Oshkovr, {S. A.} and Sulong, {Abu Bakar} and Rozli Zulkifli and {Mohd Ihsan}, {Ahmad Kamal Ariffin} and Azhari, {Che Husna}",
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AU - Eshkoor, R. A.

AU - Ude, A. U.

AU - Oshkovr, S. A.

AU - Sulong, Abu Bakar

AU - Zulkifli, Rozli

AU - Mohd Ihsan, Ahmad Kamal Ariffin

AU - Azhari, Che Husna

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - Energy absorption

KW - Natural silk composite

KW - Progressive failure

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