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Evolution of carbon nano-tube dispersion in preparation of a fiber reinforced epoxy-based composite: from a cnt masterbatch to a composite KU Leuven
This work aims to offer an insight into the evolution of the CNT dispersion in preparation of a fiber-reinforced epoxy-based composite. This is done through a stepwise comparison of the dispersion qualities of multiwall carbon nanotubes (MWCNTs) in two epoxy based nanocomposite systems. The MWCNTs used in the two nanocomposites, experienced different histories in terms of the storage time while they were stored in the form of concentrated ...
Forming Simulation of Textile Reinforced Composite Shell Structures (Vormgevingssimulatie van textielversterkte composiet schaalproducten) KU Leuven
Composietmaterialen kunnen metaal, aluminium of titanium mogelijk vervangen in verscheidene toepassingen als transport, sportartikelen, consumptie artikelen omwille van gewichtsreductie of andere ontwerpredenen. Composieten zijn heterogene materialen, samengesteld uit een versterking en een matrix materiaal. De versterking bestaat meestal uit vezels, en verschaft het composiet stijfheid en sterkte. De matrix is gewoonlijk een plastiek en leidt ...
Carbon composites based on multi-axial multi-ply stitched preforms – Part 7: Mechanical properties and damage observations in composites with sheared reinforcement KU Leuven
Biaxial multi-ply carbon fabrics (+45°/-45° and 0°/90°) were sheared up to 30°, 45° and 50° using a shearing frame. The carbon/epoxy composite plates were made using resin transfer moulding. Tensile properties were measured in two principal directions and compared with results computed with the classical laminate theory and meso-scale finite element analysis. Damage initiation in laminates due to tensile loading was investigated using acoustic ...
Assessing the estrogenic activity of chemicals present in resin based dental composites and in leachates of commercially available composites using the ERa-CALUX bioassay KU Leuven Universiteit Antwerpen Vrije Universiteit Brussel
OBJECTIVE: The biocompatibility of resin based dental composites has not yet been fully characterized even though certain monomers used in these composites are synthesized from Bisphenol A (BPA), a well-known estrogenic endocrine disruptor. As a result, they show structural relationship to BPA and can contain it as an impurity. Therefore, the estrogenic activity of 9 monomers, 2 photoinitiators, one photostabilizer and leachates of 4 ...
Tough carbon fiber composites by hybridization with self-reinforced composites KU Leuven
While the interest in carbon fiber composites for automotive applications is rapidly increasing, their high cost and low failure strain or toughness continue to impede their widespread use. Both factors can be improved by hybridizing carbon fibers with a material that offers both ductility and reduced cost. In this work, the hybridization with highly oriented polypropylene tapes was investigated. Hybrid co-woven cloths of carbon ...
Carbon fiber reinforced metal matrix composites : fabrication processes and properties Universiteit Gent
Enhanced thermographic inspection of woven fabric composites by k-space filtering Universiteit Gent
Infrared thermography is a well-known non-destructive testing technique for detecting defects in unidirectional fiber reinforced polymer laminates. When applied to woven fabric reinforced polymers, however, the weave structure causes strong disturbances and patterns in the background of the thermal images, making accurate and reliable defect assessment a challenging task. In this paper, the concept of k-space filtering is introduced for an ...