TY - CONF A1 - Houllé, Matthieu A1 - Kalinka, Gerhard A1 - Amadou, Julien A1 - Qian, H. A1 - Shaffer, M.S.P. A1 - Greenhalgh, E. A1 - Wienrich, Malte T1 - CNT-MODIFIED FABRICS FOR THE MANUFACTURING OF MULTI-FUNCTIONAL LAYERED COMPOSITES T2 - CESEP'11 4th International Conference on Carbons for Energy Storage/Conversion and Environment Protection T2 - CESEP'11 4th International Conference on Carbons for Energy Storage/Conversion and Environment Protection CY - Vichy, France DA - 2011-09-25 PY - 2011 AN - OPUS4-24450 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Shirshova, Natasha A1 - Kalinka, Gerhard A1 - Bismarck, A. A1 - Carreyette, Shuijin A1 - Fontana, Quentin P. A1 - Greenhalgh, E. A1 - Kucernack, Anthony A1 - Schaffer, Milo A1 - Wienrich, Malte T1 - Modified epoxy resin as electrolytes for structural supercapacitors T2 - European Polymer Congress 2011 T2 - European Polymer Congress 2011 CY - Granada, Spain DA - 2011-06-26 PY - 2011 AN - OPUS4-24452 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Michaeli, W. A1 - Baranowski, T. A1 - Kalinka, Gerhard T1 - Einfluss der Mikrostruktur auf den Druck- und Zug-E-Modul teilkristalliner Kunststoffe JF - Materials testing N2 - In Kooperation zwischen dem Institut für Kunststoffverarbeitung (IKV) und der Bundesanstalt für Materialforschung und -prüfung (BAM) wurde das mechanische Verhalten unter Druck- und Zugbelastung unterschiedlicher morphologischer Strukturen teilkristalliner Thermoplaste (PP und POM) untersucht. Im Ergebnis steigt der E-Modul sowohl der druck- wie auch zugbelasteten Prüfkörper aus spritzgegossenem PP und POM mit gröberem Gefüge an. Probekörper mit scherinduziertem Gefüge zeigen einen hohen Einfluss des Kristallisationsgrads auf den E-Modul. KW - Carbon fibre KW - Nanotubes KW - Hierarchical composites KW - Pull-out test KW - Push-out test PY - 2011 SN - 0025-5300 VL - 53 IS - 10 SP - 616 EP - 628 PB - Hanser CY - München AN - OPUS4-24341 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Marotzke, Christian T1 - Strength of composite structural parts - role of the fiber/matrix interface T2 - SEICO 11 - SAMPE Europe - 32nd International technical conference - New Material Characteristics to cover New Application Needs (Proceedings) N2 - The strength of laminates distinctly depends on the transverse strength of the laminas. The transverse failure is dominated by the adhesion between fiber and matrix. Usual strength criteria however do not take into account the adhesive strength explicitly. The determination of the interface strength is performed on the micromechanical scale using single fiber specimens. The fibers are loaded under off-axis loading while the debonding is monitored under a microscope. The stresses acting in the Interface are calculated by finite element analyses. It is found that for off-axial angles up to 35° interfacial debonding is the dominant failure mode while fiber breakage takes place at lower angles. The occurrence of fiber breakage and debonding under off-axis loading shows that the restriction to two potential failure planes - perpendicular or parallel to the fibers - as applied in common failure criteria has to be put in question. T2 - SEICO 11 - SAMPE Europe - 32nd International technical conference CY - Paris, France DA - 28.03.2011 KW - Composites KW - Strength KW - Adhesion PY - 2011 SN - 978-3-9523565-3-1 IS - Session 3B SP - 250 EP - 257 AN - OPUS4-23680 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard A1 - Qian, H. A1 - Bismarck, A. A1 - Greenhalgh, E. A1 - Shaffer, M.S.P. T1 - Hierarchical Composites with Carbon Nanotube Grafted Fibres T2 - ECCM 13, 13th European Conference on Composite Materials T2 - ECCM 13, 13th European Conference on Composite Materials CY - Stockholm, Sweden DA - 2011-06-02 PY - 2011 AN - OPUS4-24272 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Sonderprüfverfahren für Verbundwerkstoffe T2 - Vortragsveranstaltung VDI-AK Kunststofftechnik, BV BB an der TU Berlin T2 - Vortragsveranstaltung VDI-AK Kunststofftechnik, BV BB an der TU Berlin CY - Berlin, Deutschland DA - 2011-03-17 PY - 2011 AN - OPUS4-34456 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Qian, H. A1 - Kalinka, Gerhard A1 - Chan, K.L.A. A1 - Kazarian, S.G. A1 - Greenhalgh, E.S. A1 - Bismarck, A. A1 - Shaffer, M.S.P. T1 - Mapping local microstructure and mechanical performance around carbon nanotube grafted silica fibres: Methodologies for hierarchical composites JF - Nanoscale N2 - The introduction of carbon nanotubes (CNTs) modifies bulk polymer properties, depending on intrinsic quality, dispersion, alignment, interfacial chemistry and mechanical properties of the nanofiller. These effects can be exploited to enhance the matrices of conventional microscale fibre-reinforced polymer composites, by using primary reinforcing fibres grafted with CNTs. This paper presents a methodology that combines atomic force microscopy, polarised Raman spectroscopy, and nanoindentation techniques, to study the distribution, alignment and orientation of CNTs in the vicinity of epoxy-embedded micrometre-scale silica fibres, as well as, the resulting local mechanical properties of the matrix. Raman maps of key features in the CNT spectra clearly show the CNT distribution and orientation, including a ‘parted’ morphology associated with long grafted CNTs. The hardness and indentation modulus of the epoxy matrix were improved locally by 28% and 24%, respectively, due to the reinforcing effects of CNTs. Moreover, a slower stress relaxation was observed in the epoxy region containing CNTs, which may be due to restricted molecular mobility of the matrix. The proposed methodology is likely to be relevant to further studies of nanocomposites and hierarchical composites. KW - Nanotubes KW - Silica fibres KW - Nano indentation KW - Mapping PY - 2011 DO - https://doi.org/10.1039/c1nr10497g SN - 2040-3364 SN - 2040-3372 VL - 3 IS - 11 SP - 4759 EP - 4767 PB - RSC Publ. CY - Cambridge AN - OPUS4-34718 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -