Defect tolerance of fibrous networks
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 defomatio...
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| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/4121/ http://eprints.uthm.edu.my/4121/1/Koh%2C_Ching%2DTheng_(UTHM%2C_Johore%2C_Malaysia)__425.pdf |
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| Summary: | 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. |
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