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.
|Title of host publication||Unknown Host Publication|
|Publisher||European Conference on Composite Materials|
|Number of pages||8|
|Publication status||Published - 24 Jun 2012|
|Event||ECCM15 - 15TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, - Venice, Italy|
Duration: 24 Jun 2012 → …
|Conference||ECCM15 - 15TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS,|
|Period||24/06/12 → …|
Broderick, J., Archer, E., McMillan, A., & McIlhagger, AT. (2012). Internal Strain Measurement and Impact Response of 3D Woven Carbon Fibre Composites. In Unknown Host Publication European Conference on Composite Materials.