Discontinuous carbon fibre composite (DCFC) is a new low-cost material that has already been applied for commercial components, such as window frames of the Boeing 787 Dreamliner. Studying DCFC is very challenging because it does not show the same behaviour than conventional composites or isotropic materials. This work presents an experimental study of DCFC specimens submitted to static and fatigue tensile loading, based on mechanical and thermography non destructive evaluation (NDE) technique. An infra-red (IR) camera is used for real time monitoring of temperature change at the specimen outer surface. Under static loading, thermal response permits to well detect the early appearance of micro defects up to the final failure of DCFC material. Moreover, thermal response gives a good correlation with the damage evolution under fatigue loading. It is also shown that thermography method allows to successfully determine the high cycle fatigue strength (HCFS) of DCFC material.
carbon fibre, discontinuous reinforcement, fatigue, thermal analysis.
This work was funded by PSA Peugeot Citroën in France as a collaboration project with LEME laboratory of University of Paris Ouest Nanterre-La Défense. The Ministries of Education and Culture of Indonesia provided the financial support for the PhD studies of the first author.
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