Institute of Textile Technology and Process Engineering

Lightweight panels are of high relevance for various applications, such as automotive, aerospace, civil engineering, and achieve high stiffnesses and strengths at low self-weight. The sandwich principle is commonly used to manufacture the panels, although conventional materials and reinforcement structures often limit the design and application of the panels in a wide range of possible applications. The reason for this is that lightweight panels fail either under combined compressive/shear loading or as a result of delamination of the individual layers. In this article, novel fabric structures are presented as a basis for the fabrication of lightweight panels that effectively overcome these deficiencies. These fabrics have a spatial truss-like structure, with the core and top layer being connected by continuously running reinforcing fibers. This results in high panel stability and high delamination resistance, which are evaluated in this article using mechanical tests in compression, flexure and combined tension-shear. The results are related to sample panels with conventional honeycomb core as reference. The high potential and excellent delamination resistance of the new fabric-based lightweight panels is shown in the result of the tests.

monitoring instruments, in 2017, it presented the project: Automation of three-dimensional percolation and stability analysis of dams. Previous reports of the project presented the 3D modeling of the Pera Jusante and Gelado dams located in the Carajs Complex, as well as the steady state and transient hydrogeological calibration of the model. From this calibration, several unfavorable predictive scenarios were generated for each dam, in order to analyze possible changes in the piezometric levels and in the poropressures inside and around the dams.

This paper describes an auxiliary image sequence plug-in that enhances SMPTE ST 2067, SMPTE TSP 2121 suit of documents to enable compositing workflows through the use of the Interoperable Master Format (IMF). — The component-based nature of IMF allows multiple versions of a programme to be created, managed and distributed more efficiently. However, it is currently limited to a single concurrent video track in any composition; a restriction which limits certain use cases that could otherwise realise the benefit of IMF's full capabilities. — Our primary use case for the auxiliary image sequence is the management of sign-interpreted programming. This currently necessitates the creation of a new full-length master for each version created. Instead it is proposed that the video of the sign interpreter will be stored as a separate component. This will allow the implementer to be composited with the main programme when required. — A working prototype of a simple compositing processes has been developed by the DPP in partnership with its member companies. Opportunities for more complex and dynamic compositing via Output Profile List (OPL) and time-variant metadata are also discussed in the paper, along with other use-cases for the functionality described. — The plug-in described in this paper will provide benefit to the implementer throughout the IMF lifecycle by enabling storage, editing, re-positioning and processing of the auxiliary image sequence before compositing.

One of today’s megatrends in the industrial environment is additive manufacturing. Faster prototyping, customized products like hearing devices, integrated functions like heatsinks and many other opportunities are offered by this technological development. The opportunity of using different materials and build up 3-D structures is virtually infinite. Another one is the digitalization of almost any product to build up a smart world. This trend leads to a tremendously rising amount of data to be transferred from one place to another. If a wireless transmission is not possible and if the distance is over 100 m glass fiber is the fastest and most secure way for these requirements. In case of most short-range applications up to 100 m primary copper cables or circuit paths are in use because the electrical data transfer is well known. The limited bandwidth of copper asks for new inventions to meet the demands of tomorrow. Regarding both megatrends, the solution for this upcoming bottleneck could be 3-D printed photonic packages. This paper shows a new and innovative way for the customized fabricating of short-range data transmission networks. By Aerosol Jet Printing (AJP) the so called polymer optical waveguides (POW), it is possible to build up 3-D printed light guiding structures with low attenuation on almost any three-dimensional surface. The main advantages of the here presented research are high flexibility, low weight and low costs. After three years of intensive studies the most important key facts (machine settings, geometry, performance) are summarized in this publication.

Abstract The transition between the seventeenth and eighteenth centuries has been a period of very little, if any, knowledge for the historians of Spanish. Between the classical period of the Siglo de Oro and the beginning of modernity in the eighteenth century there was no event of interest at that time. Modern research on the history of Spanish vocabulary or texts shows that from1675 onwards we can find forms and discursive traditions that are central in modern Spanish, while processes fromearlier periods continued. In this paperwe will analyze some of themost significant (non-literary) texts of those years, and try to establish their defining linguistic and discursive traits.

Separating wounded serosa by physical barriers is the only clinically approved adjunct for postoperative adhesion prevention. Since the optimal adhesion barrier has not been found, it is essential to improve our pathogenic understanding of adhesion formation and to compare the effects of different barrier materials on tissue and cells. Wistar rats underwent standardized peritoneal damage and were treated either with Seprafilm, Adept, Intercoat, Spraygel, SupraSeal or remained untreated as a control. 14 days postoperatively, the lesions were explanted and histomorphologically analyzed using the European ISO score to evaluate material implants. Striking differences between the material groups were present regarding the inflammation, fibrosis, and foreign body reaction. According to the ISO score, Intercoat and Spraygel were considered as nonirritating to tissue. Adept, Seprafilm, and SupraSeal were assessed as mild-irritating materials. Interestingly, the most effective material in adhesion prevention revealed moderate inflammation accompanied by minor fibrosis. The degree of inflammation to barrier materials does not predict the efficacy in the prevention of adhesions. Histopathological investigations are crucial to improve our understanding of the cellular mechanisms during adhesion formation and elucidate the tissue response to material approaches used in adhesion prevention. This will lead to improved antiadhesive strategies and the development of functional barrier biomaterials. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 598-609, 2018.

The aim of this study is the biomimetic optimisation of branched fibre-reinforced composites based on the detailed analysis of biological concept generators. The methods include analyses of the functional morphology and biomechanics of arborescent monocotyledons and columnar cacti as well as measurements and modelling of mechanical properties of biomimetic fibre-reinforced composites. The key results show evidence of notch stress reduction by optimised stem-branch-attachment morphology in monocotyledons and columnar cacti. It could be shown that some of these highly interesting properties can be transferred into biomimetic fibre-reinforced composites.