R., Z., U., U., S., P., H., A. (2008). INTERLAMINAR FRACTURE TOUGHNESS OF MULTI-LAYER WOVEN SILK FIBRE/POLYESTER COMPOSITES. test, 13(13th International Conference on Applied Mechanics and Mechanical Engineering.), 154-162. doi: 10.21608/amme.2008.39403
ZULKIFLI R.; UCHENNA A. U.; PEI K. S.; AZHARI C. H.. "INTERLAMINAR FRACTURE TOUGHNESS OF MULTI-LAYER WOVEN SILK FIBRE/POLYESTER COMPOSITES". test, 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., 2008, 154-162. doi: 10.21608/amme.2008.39403
R., Z., U., U., S., P., H., A. (2008). 'INTERLAMINAR FRACTURE TOUGHNESS OF MULTI-LAYER WOVEN SILK FIBRE/POLYESTER COMPOSITES', test, 13(13th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 154-162. doi: 10.21608/amme.2008.39403
R., Z., U., U., S., P., H., A. INTERLAMINAR FRACTURE TOUGHNESS OF MULTI-LAYER WOVEN SILK FIBRE/POLYESTER COMPOSITES. test, 2008; 13(13th International Conference on Applied Mechanics and Mechanical Engineering.): 154-162. doi: 10.21608/amme.2008.39403

INTERLAMINAR FRACTURE TOUGHNESS OF MULTI-LAYER WOVEN SILK FIBRE/POLYESTER COMPOSITES

The International Conference on Applied Mechanics and Mechanical Engineering
Article 82, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Pages 154-162    PDF (607.6 K)
Document Type: Original Article
DOI: 10.21608/amme.2008.39403
Authors
ZULKIFLI R.1; UCHENNA A. U.2; PEI K. S.3; AZHARI C. H.4
1Senior Lecturer, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
2Graduate student, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
3Undergraduate student, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
4Professor, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
Abstract
ABSTRACT
The effect of the number of layers of woven silk fibre on the interlaminar fracture
toughness of silk/polyester composites which is a measure of the resistance of the
material to delamination crack propagation has been studied. The multi-layer woven silk
fibre/polyester composites were produced by compression moulding technique with
increasing layers of silk of between 8 and 14 layers in thermoset polyester. The
composite panels have been tested for mode I interlaminar fracture using double
cantilever beam specimens (DCB) testing method. It was found that the interlaminar
fracture toughness, GIC of the composite increases as the number of silk fibre layers
increases. Stable crack propagation is observed during the tests and the crack
propagation areas showed all the fibres were bare with no matrix covering them as
were seen at 100x and 500x magnification using SEM. Failure occurred at the fibrematrix
interface with no fibre bridging observed between the two fracture surfaces. The
smooth clean surface of the silk fibres is the result of poor interfacial debonding and the
increases in interlaminar fracture toughness is also due to improve strength of the
composites panel.
Keywords
Interlaminar fracture toughness; Composite materials; silk fibre; polyester and scanning electron microscopy
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