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E. Barbarella¹, O. Allix¹, F. Daghia¹, T. Jollivet² and J. Lamon¹

¹LMT-Cachan, ENS Cachan, CNRS, UPMC, PRES, UniverSud, France
²CETIM, Nantes, France

doi:10.4203/ccp.106.182

E. Barbarella, O. Allix, F. Daghia, T. Jollivet, J. Lamon, "Towards a Mechanical Characterization of Manufacturing Defects of Thermoplastic Composites", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 182, 2014. doi:10.4203/ccp.106.182

Keywords: buckling, thermoplastic composites, manufacturing defects, inverse problems, simulation, experiment..

Summary

In this paper, we investigate the feasibility of an inverse technique based on the buckling response for the mechanical characterization of manufacturing flaws of long fibre thermoplastic composites. Buckling tests are chosen because of their strong sensitivity to defects. An approach based on the Southwell plot is introduced to distinguish between global "geometric" flaws (such an initial curvature or a defect on the applied boundary conditions) and local "material" flaws (such as fibre misalignments, the defect considered here). Preliminary numerical and experimental tests are carried out and the measured and predicted critical loads are successfully compared. The development of a full inverse approach for defect characterization is in progress.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 182 Towards a Mechanical Characterization of Manufacturing Defects of Thermoplastic Composites E. Barbarella¹, O. Allix¹, F. Daghia¹, T. Jollivet² and J. Lamon¹ ¹LMT-Cachan, ENS Cachan, CNRS, UPMC, PRES, UniverSud, France ²CETIM, Nantes, France doi:10.4203/ccp.106.182 purchase the full-text of this paper Full Bibliographic Reference for this paper E. Barbarella, O. Allix, F. Daghia, T. Jollivet, J. Lamon, "Towards a Mechanical Characterization of Manufacturing Defects of Thermoplastic Composites", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 182, 2014. doi:10.4203/ccp.106.182 Keywords: buckling, thermoplastic composites, manufacturing defects, inverse problems, simulation, experiment.. Summary In this paper, we investigate the feasibility of an inverse technique based on the buckling response for the mechanical characterization of manufacturing flaws of long fibre thermoplastic composites. Buckling tests are chosen because of their strong sensitivity to defects. An approach based on the Southwell plot is introduced to distinguish between global "geometric" flaws (such an initial curvature or a defect on the applied boundary conditions) and local "material" flaws (such as fibre misalignments, the defect considered here). Preliminary numerical and experimental tests are carried out and the measured and predicted critical loads are successfully compared. The development of a full inverse approach for defect characterization is in progress. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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