Abstract
Extrinsic Fabry Perot Interferometer (EFPI) fibre optic sensors have been utilised to measure the internal matrix strain in a three dimensionally woven carbon fibre reinforced polymer composite. EFPI sensors were embedded at two levels within a four layer 3D woven composite, and comparison surface measurements were provided through resistive strain gauging and biaxial extensometry. A variation in tensile modulus of as much as 24% was found from internal measurement compared with the material surface. Through correlation with micro-graphical analysis, a link between the variations in mechanical performance and localised variations in fibre volume fraction could be established. Furthermore, the impact performance was measured.
| Original language | English |
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| Title of host publication | Unknown Host Publication |
| Publisher | European Conference on Composite Materials |
| Number of pages | 8 |
| ISBN (Print) | 978-88-88785-33-2 |
| Publication status | Published (in print/issue) - 24 Jun 2012 |
| Event | ECCM15 - 15TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, - Venice, Italy Duration: 24 Jun 2012 → … |
Conference
| Conference | ECCM15 - 15TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, |
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| Period | 24/06/12 → … |