@inproceedings{LadewigSieglEhrlich, author = {Ladewig, Sven and Siegl, Marco and Ehrlich, Ingo}, title = {Discussion about Viscosity Theories for Fibre-Reinforced Thermoplastics}, series = {Applied Research Conference 2018 - ARC 2018, 10 July, Deggendorf}, booktitle = {Applied Research Conference 2018 - ARC 2018, 10 July, Deggendorf}, editor = {Mottok, J{\"u}rgen and Reichenberger, Marcus and Bogner, Werner}, publisher = {Pro Business Verlag}, address = {Berlin}, pages = {144 -- 149}, abstract = {The effect of process variables such as shear rate and temperature on the viscosity of polypropylene during the processing of thermoplastic based composites was investigated in this study. The melt impregnation is used in the process of continuous glass fibre reinforced thermoplastic composites. To develop a mathematical model for roving impregnation, it's essential to know about the viscous behaviour of the matrix system. Therefore, this paper will discuss rheological models to describe these phenomena, based on the gathered viscosity data from the partner laboratory at the University of West Bohemia in Pilsen.}, language = {en} } @article{SchimmerLadewigMotschetal., author = {Schimmer, Florian and Ladewig, Sven and Motsch, Nicole and Hausmann, Joachim M. and Ehrlich, Ingo}, title = {Comparison of Low-Velocity Impact Damage Behavior of Unidirectional Carbon Fiber-Reinforced Thermoset and Thermoplastic Composites}, series = {Key Engineering Materials}, volume = {809}, journal = {Key Engineering Materials}, publisher = {Trans Tech Publications}, issn = {1662-9795}, doi = {10.4028/www.scientific.net/KEM.809.9}, pages = {9 -- 14}, abstract = {This paper investigates the damage behavior of thermoset and thermoplastic fiber-reinforced composites. The specimens were subjected to low-velocity impacts (LVI) to produce barely visible impact damages (BVID). To compare the dependency of the matrix system and the laminate lay-up on the impact damage, four test series were set up. Therefore, laminates with an epoxy (EP) and a polyether ether ketone (PEEK) matrix in a quasi-isotropic (QI) [+45/0/-45/90]2s and an orthotropic (OT) fiber lay-up [0/90]4s were manufactured. To eliminate the influence of variant fiber systems, the thermoplastic tape and the thermoset prepreg contain similar carbon fibers (CF). After impact testing with three different impact energies, inner damages were investigated by using ultrasonic analyses. To get a deeper understanding of the interior damage mechanisms, cross sections of the damaged areas were examined via reflected light microscopy. By using these destructive and non-destructive test methods, significant differences in the damage behavior of composites with thermoplastic and thermoset matrix systems were identified for both laminate lay-ups.}, language = {en} }