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Defect tolerance of fibrous networks

Koh, Ching Theng and Michelle L. , Oyen (2013) Defect tolerance of fibrous networks. In: Twenty First Annual International Conference on Composites/Nano Engineering (ICCE-21) , 21-27 July 2013, Tenerife, Spain.

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Abstract

Structures of random fibrous networks exist in both natural and engineering materials. Knowledge of the toughening of fibrous materials, concentrating the underlying toughening mechanisms in microstructures, offers important guidelines for the design of engineering materials. The nonlinear defomation responses of fibrous networks is crucial to be considered in the understanding of their damage tolerance. Such consideration is, however, a difficult task because it involves microscopic mechanical responses at a small length scale. The microscopic responses was incorporated into macroscopic domain using finite element analysis. The detailed study of microstructures at crack tips explains how nonlinear deformation responses of fibrous networks can improve their defect tolerance. The network flexibility allows fibers to dissipate energy through the fiber rearrangement and thus reducing stress concentration at the crack tip. As a result, the random networks formed into fiber bundles, which aligned perpendicular to the crack tip.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: fibrous networks; damage tolerance; finite element analysis; toughening
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Normajihan Abd. Rahman
Date Deposited: 10 Sep 2013 00:43
Last Modified: 21 Jan 2015 07:56
URI: http://eprints.uthm.edu.my/id/eprint/4121
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