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Zur statischen Tragfähigkeit geklebter Kreishohlprofilverbindungen im Stahlbau

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Book Series: Berichte zum Stahl- und Leichtbau / Karlsruher Institut für Technologie, Versuchsanstalt für Stahl, Holz und Steine, Stahl- und Leichtbau ISSN: 21987912 ISBN: 9783731505617 Year: Volume: 6 Pages: XIII, 219 p. DOI: 10.5445/KSP/1000057648 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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A high capacity adhesively bonded joint of hollow sections in steel construction is developed in the scope of this thesis. In particular, the boundary conditions and requirements of the building industry are considered. The load-bearing behaviour of the adhesively bonded joints is determined and analysed with experimental and numerical investigations. The development and validation of a method to predict the load-bearing capacity of adhesively bonded joints emphasises additional features.

Multifunctional Oxide-Based Materials: From Synthesis to Application

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ISBN: 9783039213979 / 9783039213986 Year: Pages: 202 DOI: 10.3390/books978-3-03921-398-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-12-09 11:49:15
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Synthesis, Study and Utilization of Natural Products

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ISBN: 9783039281527 / 9783039281534 Year: Pages: 234 DOI: 10.3390/books978-3-03928-153-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemical Engineering --- Technology (General)
Added to DOAB on : 2020-01-30 16:39:46
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Natural products and the preparations based on them play a stable and ever-increasing role in human and veterinary medicine, agriculture, in food and the cosmetic industry, and in an increasing number of other fields. Their importance is based on the fact that they are mostly bound to renewable sources, which in fact makes them valuable within a circular economy, inter alia. At the same time, natural products provide the origin of stereochemistry, optical activity, regioselectivity, chirality, and many other concepts and directions within science, development, and industry in a scope, which is indispensable. They serve as a constant powerful stimulus and model that inspires researchers to create new effective tools, similar to natural ones, for controlling bioregulation mechanisms and solving practical problems. This was the reason for organizing this Special Issue aimed at underlining the current developments in all the fields connected to natural products.

Keywords

insect sex pheromone --- tea tussock moth --- total synthesis --- resource chemistry --- phycocyanin --- biosynthesis --- antioxidant --- Spirulina --- gene expression --- apo-CpcB --- Plantago depressa --- octadecanoid --- fatty acid --- natural enantiomer --- anti-inflammation --- soy protein isolate --- bromelain --- triglycidylamine --- viscosity --- water resistance --- adhesive --- Ramulus mori --- polysaccharides --- bioactivity --- synthesis of natural products --- varioxiranol A --- 4-epi-varioxiranol A --- absolute structure --- Emericella variecolor --- caffeoylquinic acids --- chlorogenic acid --- derivatives --- lipid-lowering effects --- oleic acid-elicited --- HepG2 cells --- isosorbide --- reversible urethane linkages --- cell opening --- antioxidant activity --- radical scavenger --- flexible polyurethane foam --- tomato --- SlCOMT1 --- melatonin --- genetical transformation --- salt stress --- natural product --- RiPP --- ribosomally synthesized --- post-translationally modified peptides --- rheumatoid arthritis --- natural products --- polyphenol --- flavonoids --- phenolic acid --- stilbene --- ginkgolide --- platelet-activating factor receptor --- inhibitor --- pinocembrin --- microbial biosynthesis --- pharmacological activities --- pharmacokinetic features --- research progress --- triterpenoids --- bardoxolone methyl --- anticancer drug --- mitochondria --- apoptosis --- cancer cells --- cytotoxicity --- flow cytometry --- live-cell fluorescence microscopy --- PEGylated purpurin 18 --- photodynamic therapy --- photosensitizer --- phototoxicity --- singlet oxygen --- n/a

Polymeric Foams

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ISBN: 9783039216321 / 9783039216338 Year: Pages: 322 DOI: 10.3390/books978-3-03921-633-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Chemical Engineering
Added to DOAB on : 2019-12-09 11:49:16
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Advances in nanotechnology have boosted the development of more efficient materials, with emerging sectors (electronics, energy, aerospace, etc.) demanding novel materials to fulfill the complex technical requirements of their products. This is the case of polymeric foams, which may display good structural properties alongside functional characteristics through a complex composition and (micro)structure in which a gas phase is combined with rigid ones, mainly based on nanoparticles, dispersed throughout the polymer matrix. In recent years, there has been an important impulse in the development of nanocomposite foams, extending the concept of nanocomposites to the field of cellular materials. This, alongside developments in new advanced foaming technologies which have allowed the generation of foams with micro, sub-micro, and even nanocellular structures, has extended the applications of more traditional foams in terms of weight reduction, damping, and thermal and/or acoustic insulation to novel possibilities, such as electromagnetic interference (EMI) shielding. This Special Issue, which consists of a total of 22 articles, including one review article written by research groups of experts in the field, considers recent research on novel polymer-based foams in all their aspects: design, composition, processing and fabrication, microstructure, characterization and analysis, applications and service behavior, recycling and reuse, etc.

Keywords

grey relational analysis --- multi-objective particle swarm optimization --- acoustic performances --- Ethylene Propylene Diene Monomer --- polyurethane foam composites --- DOPO --- itaconic acid --- ethyl cellulose --- phenolic foams --- composites --- adjacent façade --- PUR --- energy conservation --- heat transfer --- burning characteristic --- semi-rigid polyurethane foams --- aluminum microfibers --- quasi-static compression tests --- mechanical properties --- energy absorption capability --- foams --- polyamide --- crystalline --- thermal conductivity --- mechanical property --- functional --- biomaterials --- composites --- EMI --- cellulose foam --- polypropylene --- foaming quality --- impact property --- intrinsic toughness --- flame-retardant ABS microcellular foams --- phosphorus flame retardants --- MuCell® injection-molding foaming --- graphene oxide --- rigid polyurethane foam --- thermogravimetric analysis --- activation energies --- extrusion foaming --- super critical CO2 --- lignin --- sound absorption coefficient --- mechanical property --- Pluronic --- surfactants --- foams --- SANS --- multilayers --- epoxy composite foam adhesive --- core–shell rubber --- impact wedge–peel test --- automobile structural adhesives --- flame retardancy --- foams --- phosphorus --- ternary synergistic effect --- polypropylene --- fluoelastomer --- scCO2 foaming --- heterogeneous nucleation --- polypropylene --- cellulose nanofiber --- foam injection molding --- mechanical properties --- polystyrene foams --- 1,3,5-benzene-trisamides --- cell nucleation --- foam extrusion --- foam morphology --- supramolecular additives --- thermal insulation --- compression properties --- piezoelectric --- functional foam --- piezocomposite --- PZT --- expandable microspheres --- permittivity --- polyetherimide foams --- graphene --- multifunctional foams --- ultrasonication --- scCO2 --- electrical conductivity --- polymer waste --- polyurethane foam --- leaching test --- microstructure --- absorbent PMI foam --- metallic tube --- electromagnetic wave absorption --- mechanical properties --- failure mechanism --- polymers --- foams --- shock compression --- equation of state --- epoxy --- foams --- expandable microspheres --- graphene --- nanotubes --- conductivity --- syntactic foams --- n/a

Surface Modification to Improve Properties of Materials

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ISBN: 9783038977964 9783038977971 Year: Pages: 356 DOI: 10.3390/books978-3-03897-797-1 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-04-25 16:37:17
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This book contains selected contributions on surface modification to improve the properties of solid materials. The surface properties are tailored either by functionalization, etching, or deposition of a thin coating. Functionalization is achieved by a brief treatment with non-equilibrium gaseous plasma containing suitable radicals that interact chemically with the material surface and thus enable the formation of rather stable functional groups. Etching is performed in order to modify the surface morphology. The etching parameters are selected in such a way that a rich morphology of the surfaces is achieved spontaneously on the sub-micrometer scale, without using masks. The combination of adequate surface morphology and functionalization of materials leads to superior surface properties which are particularly beneficial for the desired response upon incubation with biological matter. Alternatively, the materials are coated with a suitable thin film that is useful in various applications from food to aerospace industries.

Keywords

sulphur hexafluoride (SF6) plasma --- tetrafluoromethane (CF4) plasma --- polymer polyethylene terephthalate (PET) --- surface modification --- functionalization and wettability --- optical emission spectroscopy (OES) --- electronegativity --- PVD nanocomposite coatings --- aluminum die casting --- tool life --- tribological performance --- plasma surface modification --- polymer polypropylene --- neutral oxygen atom density --- initial surface functionalization --- food packaging --- wettability --- tantalum --- hardness --- gradient nanostructured layer --- grain size --- residual stress --- dry wear behavior --- surface texture --- surface treatment --- Ti6Al4V alloy --- tribology --- biology --- materials characterization --- shot-peening --- image processing --- TIG welding --- aluminum 6061-T6 --- special surfaces --- wettability --- superhydrophobic --- cell cultures --- anti-bio adhesion --- self-cleaning fabrics --- polyethylene granules --- low-pressure MW air plasma --- optical emission spectroscopy --- XPS --- laser cobalt catalytic probe --- Alloy 718 --- surface hardness --- surface residual stress --- grain size --- fretting failure --- corrosion --- antimicrobial film --- nisin --- physical properties --- plasma treatment polyvinyl alcohol --- surface characterization --- microhole-textured tool --- CaF2 --- micro-EDM --- tribological properties --- egg shell --- stearic acid --- modification --- particle characterization --- epoxy composites --- dynamic mechanical analysis --- adhesion effectiveness --- Poly(tetrafluoroethylene) --- Teflon --- plasma treatment --- zeta potential --- surface energy --- contact angle measurement --- lectin --- bovine serum albumin --- adsorption --- cellulose thin film --- polystyrene --- gold --- surface plasmon resonance spectroscopy --- silver nanoparticles --- laser ablation in liquids --- laser synthesis of colloidal nanoparticles solution --- nanoparticle-impregnated paper --- antimicrobial activity --- fiber fines --- sheet forming --- vacuum filtration --- pulse power --- electrical stimulation --- electric field --- mushroom --- L. edodes --- Lyophyllum deeastes Sing --- surface modification --- porous silicon --- silicon surface --- carbonization --- oxidation --- aluminum --- alloy --- duralumin --- etching --- surface texture --- porous-like --- adhesive bonding --- superhydrophobic --- porous silicon --- visible light assisted organosilanization --- solid state NMR --- XPS --- ToF-SIMS --- atmospheric pressure plasma jets --- plasma polymerization --- superhydrophobicity --- wetting --- biomaterial --- polymer --- plasma --- functionalization --- surface properties --- thrombosis --- hemocompatibility --- endothealization --- vascular graft --- biocompatibility --- endothelial cells --- surface properties --- nanostructuring --- functionalization --- grafting

Non-destructive Testing of Materials in Civil Engineering

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ISBN: 9783039216901 / 9783039216918 Year: Pages: 448 DOI: 10.3390/books978-3-03921-691-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:16
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This book was proposed and organized as a means to present recent developments in the field of nondestructive testing of materials in civil engineering. For this reason, the articles highlighted in this editorial relate to different aspects of nondestructive testing of different materials in civil engineering—from building materials to building structures. The current trend in the development of nondestructive testing of materials in civil engineering is mainly concerned with the detection of flaws and defects in concrete elements and structures, and acoustic methods predominate in this field. As in medicine, the trend is towards designing test equipment that allows one to obtain a picture of the inside of the tested element and materials. From this point of view, interesting results with significance for building practices have been obtained

Keywords

non-destructive testing --- masonry structures --- strengthening --- ultrasonic tomography --- adhesion assessment --- autoclaved aerated concrete (AAC) --- compressive strength --- shape and size of specimen --- moisture of AAC --- ultrasonic testing --- gantry crane --- RMF technique --- civil engineering --- fibre-cement boards --- non-destructive testing --- acoustic emission --- degree of degradation --- thermovision --- active thermography --- thermal contrast --- defect detection --- location of inclusions --- non-destructive testing --- materials research --- building partition --- cement-based composites --- fiber cement boards --- durability --- ultrasound measurements --- spun concrete --- micro-computed tomography --- nanoindentation --- deconvolution --- mathematical morphology --- non-destructive evaluation --- structural damage --- natural frequency --- singular value truncation --- multiple feedbacks --- data noise --- NDT methods --- rebar location --- eddy-current method --- GPR method --- concrete --- concrete mix design --- concrete strength prediction --- data mining --- machine learning --- timber structures --- non-destructive methods --- ultrasonic wave --- stress wave --- drilling resistance --- X-ray micro-computed tomography --- waste brick dust --- adsorption --- lead --- cesium --- surface complexation --- precipitation --- solid-state NMR spectroscopy --- Lamb waves --- scanning laser vibrometry --- adhesive joints --- non-destructive testing --- damage detection --- excitation frequency --- nondestructive testing --- thermography --- monitoring of structures --- reinforced concrete chimney --- corrosion processes --- service life of a structure --- viscoelastic parameters --- creep test --- fatigue tests --- asphalt mixtures --- Burgers model --- four point bending beam --- pattern recognition --- acoustic emission --- Structural Health Monitoring --- brittle fracture --- diagnostics --- non-destructive testing --- reinforced concrete grandstand stadium --- vibration analysis --- crowd-induced excitation --- structural tuning --- concrete slabs and floorings --- horizontal casting --- compressive strength --- ultrasonic tests --- fibre-cement boards --- non-destructive testing --- acoustic emission --- artificial neural networks --- SEM --- non-destructive method --- damage --- mercury intrusion porosimetry --- X-ray computed tomography --- acoustic emission AE --- acoustic spectrum --- quasi brittle cement composites --- destruction process --- resistance measurement --- wood moisture sensing --- non-destructive testing --- moisture safety --- cellulose fibre cement boards --- microstructure --- nanoindentation --- SEM-EDS analysis --- temperature --- concrete elements --- concrete strength --- reinforced concrete tanks --- concrete corrosion --- sulphate corrosion --- ultrasound tests --- rebound hammer --- SilverSchmidt --- concrete --- compressive strength --- non-destructive testing --- non-destructive testing --- diagnostic --- acoustic methods --- ultrasound --- building materials --- defects

Machining—Recent Advances, Applications and Challenges

Authors: ---
ISBN: 9783039213771 / 9783039213788 Year: Pages: 554 DOI: 10.3390/books978-3-03921-378-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 16:10:12
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The Special Issue Machining—Recent Advances, Applications and Challenges is intended as a humble collection of some of the hottest topics in machining. The manufacturing industry is a varying and challenging environment where new advances emerge from one day to another. In recent years, new manufacturing procedures have retained increasing attention from the industrial and scientific community. However, machining still remains the key operation to achieve high productivity and precision for high-added value parts. Continuous research is performed, and new ideas are constantly considered. This Special Issue summarizes selected high-quality papers which were submitted, peer-reviewed, and recommended by experts. It covers some (but not only) of the following topics: High performance operations for difficult-to-cut alloys, wrought and cast materials, light alloys, ceramics, etc.; Cutting tools, grades, substrates and coatings. Wear damage; Advanced cooling in machining: Minimum quantity of lubricant, dry or cryogenics; Modelling, focused on the reduction of risks, the process outcome, and to maintain surface integrity; Vibration problems in machines: Active and passive/predictive methods, sources, diagnosis and avoidance; Influence of machining in new concepts of machine–tool, and machine static and dynamic behaviors; Machinability of new composites, brittle and emerging materials; Assisted machining processes by high-pressure, laser, US, and others; Introduction of new analytics and decision making into machining programming. We wish to thank the reviewers and staff from Materials for their comments, advice, suggestions and invaluable support during the development of this Special Issue.

Keywords

dry-cutting --- concrete --- segmented diamond blade --- topography --- diameter variation --- weight loss --- in situ estimation --- SACE-drilled hole depth --- spark-assisted chemical engraving --- glass machining --- computer vision --- electrochemical discharge machining --- butt weld joint --- fatigue --- crack growth rate --- weld reinforcement --- cooling rate --- artificial neutral network --- cutting parameters --- magnesium alloys --- optimization --- prime machining costs --- surface roughness --- electropulsing --- machinability --- chip compression ratio --- current density --- specific cutting energy --- cutting edge microgeometry --- residual stress --- finite element model --- cutting edge preparation --- Inconel 718 --- stiffness properties --- parameter identification --- connections --- machine tool --- response surface methodology --- design of experiments --- modal testing --- plastic zone --- fracture mechanism --- steel sheet --- cutting process --- Huber–Mises stress --- finite element method --- microscopic analysis --- PVD Ti0.41Al0.59N/Ti0.55Al0.45N coating --- cutting temperature --- Inconel 718 --- cutting tool wear --- secondary adhesion wear --- turning --- machining --- aluminium --- flank super abrasive machining (SAM) --- flank milling --- Inconel® 718 --- roughness --- residual stress --- machine vision --- on-machine monitoring --- tool insert condition --- computer numerical control --- turning machine tools --- multi-beam laser --- heat transfer analysis --- fast simulation --- GPU --- analytic solution --- minimum quantity lubrication --- surface grinding --- multi-objective optimization --- grey relational analysis --- surface topography --- sustainable machining --- Gamma-TiAl --- superalloys --- slight materials --- drilling --- titanium aluminides --- additive manufacturing --- single point incremental sheet forming --- residual stresses --- X-ray diffraction --- ultra-precision machining --- slow tool servo --- surface topography --- simulation --- microlens array --- sinusoidal grid --- Milling stability --- variable pitch --- chatter --- self-excitation --- milling --- ceramics --- ductile machining --- PCD --- corner radius --- material removal rate --- adhesive --- machining --- modelling --- dry --- CFRP/UNS A92024 --- induction assisted milling --- tool wear --- taguchi method --- cutting tool --- machining temperatures at two deformation zones --- force–temperature correlation through analytical modeling --- high computational efficiency --- real-time prediction --- hybrid stacks drilling --- minimum quantity lubrication --- hole quality --- tool wear --- WEDM --- EN 31 steel --- surface roughness --- fractal dimension --- ANN --- GA --- cryogenic machining --- cutting tool --- cutting geometry --- titanium --- power consumption --- material-removal rate --- specific energy consumption --- grain density --- modeling --- shape memory alloy --- superelastic nitinol --- WEDM --- heat transfer search algorithm --- DSC test --- shape memory effect --- dish angle --- trochoidal step --- response surface methodology --- surface roughness --- desirability approach --- tool wear --- trochoidal milling --- titanium alloy --- chip morphology --- thin-wall machining --- chatter --- vibration --- deflection --- damping --- prediction --- workholding --- fixture --- dynamic --- stability --- titanium alloys --- machining --- turning --- machinability --- tool wear --- laser-assisted machining --- Taguchi method --- optimal machining conditions --- machining characteristic --- milling --- the cutting force components --- vibrations --- magnesium alloys --- artificial neural networks

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