The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Wim Deferme - One of the best experts on this subject based on the ideXlab platform.
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printing smart designs of light emitting devices with maintained textile properties
Materials, 2018Co-Authors: Inge Verboven, Jeroen Stryckers, Viktorija Mecnika, Glen Vandevenne, Manoj Jose, Wim DefermeAbstract:To maintain typical textile properties, smart designs of light emitting devices are printed directly onto textile substrates. A first approach shows improved designs for alternating current powder electroluminescence (ACPEL) devices. A configuration with the following build-up, starting from the textile substrate, was applied using the screen printing technique: silver (10 µm)/barium titanate (10 µm)/zinc-oxide (10 µm) and poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (10 µm). Textile properties such as flexibility, Drapability and air permeability are preserved by implementing a pixel-like design of the printed layers. Another route is the application of organic light emitting devices (OLEDs) fabricated out of following layers, also starting from the textile substrate: polyurethane or acrylate (10–20 µm) as smoothing layer/silver (200 nm)/poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (35 nm)/super yellow (80 nm)/calcium/aluminum (12/17 nm). Their very thin nm-range layer thickness, preserving the flexibility and Drapability of the substrate, and their low working voltage, makes these devices the possible future in light-emitting wearables.
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Printing Smart Designs of Light Emitting Devices with Maintained Textile Properties
MDPI AG, 2018Co-Authors: Inge Verboven, Jeroen Stryckers, Viktorija Mecnika, Glen Vandevenne, Manoj Jose, Wim DefermeAbstract:To maintain typical textile properties, smart designs of light emitting devices are printed directly onto textile substrates. A first approach shows improved designs for alternating current powder electroluminescence (ACPEL) devices. A configuration with the following build-up, starting from the textile substrate, was applied using the screen printing technique: silver (10 µm)/barium titanate (10 µm)/zinc-oxide (10 µm) and poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (10 µm). Textile properties such as flexibility, Drapability and air permeability are preserved by implementing a pixel-like design of the printed layers. Another route is the application of organic light emitting devices (OLEDs) fabricated out of following layers, also starting from the textile substrate: polyurethane or acrylate (10–20 µm) as smoothing layer/silver (200 nm)/poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (35 nm)/super yellow (80 nm)/calcium/aluminum (12/17 nm). Their very thin nm-range layer thickness, preserving the flexibility and Drapability of the substrate, and their low working voltage, makes these devices the possible future in light-emitting wearables
Ken-ichiro Mori - One of the best experts on this subject based on the ideXlab platform.
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deep drawability and bendability in hot stamping of ultra high strength steel parts
Key Engineering Materials, 2016Co-Authors: Ken-ichiro Mori, Tomoyoshi Maeno, Yuzo YanagitaAbstract:The deep drawability and bendability in hot stamping of ultra-high strength steel parts were examined. Although the cold drawability is greatly influenced by the blank shape, the limiting drawing depths for the square and circular blanks were equal for hot stamping because of small flow stress. In hot hat-shaped bending using draw-and form-type tools, the effect of the blankholder force generated with the draw-type tools on the springback was small, and the seizure for the form-type tools was smaller than that of the draw-type tools. Since both edges in contact with the electrodes are not heated for resistance heating, cracks were caused at the edges for resistance heating in the transversal directions in hot stamping of an S-rail with form-type tools, and thus it is required to control deformation of the non-heating zones.
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cold deep drawing of commercial magnesium alloy sheets
Cirp Annals-manufacturing Technology, 2007Co-Authors: Ken-ichiro Mori, Hirokazu TsujiAbstract:A cold deep drawing process for commercial AZ31 magnesium alloy sheets was developed. The commercial sheets were successfully formed into circular cups at room temperature by optimising the annealing temperature of the sheets, i.e. a limiting drawing ratio of 1.75 was attained for an annealing temperature of 500 °C. The increases in elongation, n-value and r-value, and the decrease in flow stress effective in the improvement of drawability were obtained for the annealing. The apparatus for cold deep drawing without heating becomes much simpler than that for the conventional warm deep drawing. The effects of the lubricant, the clearance between the die and the punch and the corner radius of the punch on the drawability were examined. The limiting drawing ratio was increased by applying force onto the edge of a blank through the die corner. In addition, cold deep drawing of magnesium alloy square cups was performed. It was found that comparatively shallow magnesium alloy cups are satisfactorily formed at room temperature without heating.
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finite element analysis of the formability of an austenitic stainless steel sheet in warm deep drawing
Journal of Materials Processing Technology, 2003Co-Authors: Hirohiko Takuda, Ken-ichiro Mori, T Masachika, E Yamazaki, Y. WatanabeAbstract:Abstract The forming limit in warm deep drawing of a type 304 stainless steel sheet is experimentally examined and the deformation behaviour and the temperature change in the sheet are simulated by the combination of the rigid–plastic and the heat conduction finite element methods. In the simulation the deformation-induced martensitic transformation is taken into consideration. The experimental and the numerical results show the positive effect of the heating on the drawability. The limiting drawing ratio becomes higher to 2.7 in the warm deep drawing, while the ratio is 2.0 at room temperature. The improvement in the drawability is attained by the comparatively low heating temperature under 150 °C and by the cooling of the punch. The forming limit and the necking site are successfully predicted by the simulation.
D L Yin - One of the best experts on this subject based on the ideXlab platform.
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formability of az31 magnesium alloy sheets at warm working conditions
International Journal of Machine Tools & Manufacture, 2006Co-Authors: Kezhao Zhang, D L YinAbstract:Abstract Fine-grained AZ31 magnesium alloy sheets were prepared through hot-rolling process. To investigate the mechanical properties of the sheets, uniaxial tensile tests were conducted at various temperatures and strain rates. The formability of AZ31 alloy sheets at warm working conditions was evaluated by limit drawing ratio (LDR) tests and limit dome height (LDH) tests at temperatures from 50 to 240 °C. It is demonstrated that LDR increases remarkably with temperatures, whilst LDH does not seem to increase much with temperatures. The maximum LDR reaches 2.65 at a punch speed of 30mm/min at 200 °C, whereas the maximum LDH is only 10.8 mm, showing good deep drawability and poor stretchability of AZ31 alloy sheets. In addition, punch speeds and punch temperatures were found to have significant effects on the deep drawability of AZ31 magnesium alloy sheets.
Y. Watanabe - One of the best experts on this subject based on the ideXlab platform.
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finite element analysis of the formability of an austenitic stainless steel sheet in warm deep drawing
Journal of Materials Processing Technology, 2003Co-Authors: Hirohiko Takuda, Ken-ichiro Mori, T Masachika, E Yamazaki, Y. WatanabeAbstract:Abstract The forming limit in warm deep drawing of a type 304 stainless steel sheet is experimentally examined and the deformation behaviour and the temperature change in the sheet are simulated by the combination of the rigid–plastic and the heat conduction finite element methods. In the simulation the deformation-induced martensitic transformation is taken into consideration. The experimental and the numerical results show the positive effect of the heating on the drawability. The limiting drawing ratio becomes higher to 2.7 in the warm deep drawing, while the ratio is 2.0 at room temperature. The improvement in the drawability is attained by the comparatively low heating temperature under 150 °C and by the cooling of the punch. The forming limit and the necking site are successfully predicted by the simulation.
Inge Verboven - One of the best experts on this subject based on the ideXlab platform.
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printing smart designs of light emitting devices with maintained textile properties
Materials, 2018Co-Authors: Inge Verboven, Jeroen Stryckers, Viktorija Mecnika, Glen Vandevenne, Manoj Jose, Wim DefermeAbstract:To maintain typical textile properties, smart designs of light emitting devices are printed directly onto textile substrates. A first approach shows improved designs for alternating current powder electroluminescence (ACPEL) devices. A configuration with the following build-up, starting from the textile substrate, was applied using the screen printing technique: silver (10 µm)/barium titanate (10 µm)/zinc-oxide (10 µm) and poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (10 µm). Textile properties such as flexibility, Drapability and air permeability are preserved by implementing a pixel-like design of the printed layers. Another route is the application of organic light emitting devices (OLEDs) fabricated out of following layers, also starting from the textile substrate: polyurethane or acrylate (10–20 µm) as smoothing layer/silver (200 nm)/poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (35 nm)/super yellow (80 nm)/calcium/aluminum (12/17 nm). Their very thin nm-range layer thickness, preserving the flexibility and Drapability of the substrate, and their low working voltage, makes these devices the possible future in light-emitting wearables.
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Printing Smart Designs of Light Emitting Devices with Maintained Textile Properties
MDPI AG, 2018Co-Authors: Inge Verboven, Jeroen Stryckers, Viktorija Mecnika, Glen Vandevenne, Manoj Jose, Wim DefermeAbstract:To maintain typical textile properties, smart designs of light emitting devices are printed directly onto textile substrates. A first approach shows improved designs for alternating current powder electroluminescence (ACPEL) devices. A configuration with the following build-up, starting from the textile substrate, was applied using the screen printing technique: silver (10 µm)/barium titanate (10 µm)/zinc-oxide (10 µm) and poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (10 µm). Textile properties such as flexibility, Drapability and air permeability are preserved by implementing a pixel-like design of the printed layers. Another route is the application of organic light emitting devices (OLEDs) fabricated out of following layers, also starting from the textile substrate: polyurethane or acrylate (10–20 µm) as smoothing layer/silver (200 nm)/poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (35 nm)/super yellow (80 nm)/calcium/aluminum (12/17 nm). Their very thin nm-range layer thickness, preserving the flexibility and Drapability of the substrate, and their low working voltage, makes these devices the possible future in light-emitting wearables
