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Boosting impact strength of thermoplastic semistructural composites via unidirectional tapebased fabrics and tailored laminates

: Ruby, M.; Grauer, D.; Hangs, B.; Reif, M.; Henning, F.; Martsman, A.; Jespersen, S.T.

Beckwith, S.W. ; Society for the Advancement of Material and Process Engineering -SAMPE-:
Navigating the global landscape for the new composites. SAMPE Tech conference and exhibition. CD-ROM : October 22 - 25, 2012, North Charleston, South Carolina
Covina, Calif.: SAMPE, 2012
ISBN: 978-1-934551-13-4
Society for the Advancement of Material and Process Engineering (SAMPE Tech conference and exhibition) <2012, North Charleston/SC>
Fraunhofer ICT ()

A 2-part study was conducted in 2011 to investigate what effects using polypropylene-(PP)-resin-impregnated unidirectional-(UD)-glass tapes-which were subsequently converted into semi-finished tape-based non-consolidated woven fabric and consolidated tailored laminate structures-would have on the impact performance of compression-molded composites produced via inline compounded direct-long-fiber thermoplastics (D-LFT). In the first part of the study, a variety of materials and layup combinations were molded in a flat test plaque tool, samples were cut, and impact properties were measured and compared against control/benchmark pure D-LFT plaques in different thicknesses. In the second part of the study, a more complex panel featuring tall thin ribs was molded to ensure the feasibility of such tailored D-LFT parts under conditions that better mimicked commercial molding operation. This paper will describe the study and the results that were obtained.