Wittich, HansHansWittichFriedrich, KlausKlausFriedrich2018-03-292018-03-291988Journal of Thermoplastic Composite Materials 3 (1): 221-231 (1988)http://tubdok.tub.tuhh.de/handle/11420/1615Interlaminar mode I- and II-fracture energy measurements (in terms of the strain energy release rate) were carried out with different laminates of a glass fiber/thermoplastic PA 12- and aramid fiber/PA 12-composite system. Specimens were prepared from fiber bundles interspersed with polymer powder and a polymer sheath around them. The results, obtained from two different test procedures and data reduction methods, reflect a good interlaminar fracture toughness of the different laminates. This can be attributed to the large damage zone size due to the tough matrix and a big amount of fiber bridging, which is highlighted by micrographs achieved with SEM-analysis.en0892-705719883221231Sagehttp://rightsstatements.org/vocab/InC/1.0/Interlaminar FractureImpregnated Fiber BundlesIngenieurwissenschaftenJournal Articleurn:nbn:de:gbv:830-8822019410.15480/882.161211420/161510.1177/08927057880010030210.15480/882.1612Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich. This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.Journal Article