Measurement of fibre fracture toughness using an alternative specimen geometry

Mauricio V. Donadon, Brian G. Falzon, Lorenzo Iannucci, John M. Hodgkinson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)


This paper presents an experimental and numerical study focused on the tensile fibre fracture toughness characterisation of hybrid plain weave composite laminates using non-standardized Overheight Compact Tension (OCT) specimens. The position as well as the strain field ahead of the crack tip in the specimens was determined using a digital speckle photogrammetry system. The limitation on the applicability of standard data reduction schemes for the determination of the intralaminar fibre fracture toughness of composites is presented and discussed. A methodology based on the numerical evaluation of the strain energy release rate using the J-integral method is proposed to derive new geometric correction functions for the determination of stress intensity factor for alternative composite specimen geometries. A comparison between different methods currently available to compute the intralaminar fracture toughness in composites is also presented and discussed. Good agreement between numerical and experimental results using the proposed methodology was obtained.
Original languageEnglish
Title of host publicationProceedings of The Sixteenth International Conference on Composite Materials, July 8-13, 2007: Kyoto, Japan
EditorsKazuro Kageyama, Takashi Ishikawa, et al
Number of pages7
Publication statusPublished - 13 Jul 2007
Event16th International Conference on Composite Materials - Kyoto, Japan
Duration: 08 Jul 200713 Jul 2007


Conference16th International Conference on Composite Materials

Bibliographical note

Proceedings published on-line and on CD-ROM


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