Abstract:
L'invention concerne une éprouvette (40) adaptable à des tests en pelage, issue d'une aube, et comprenant; une portion de pale (42) qui comporte une surface d'intrados (42a), une surface d'extrados (42b), et un bord d'attaque (46) et/ou de fuite, et un renfort de l'aube (44) qui recouvre et est collé sur au moins une partie de la surface d'intrados, une partie de la surface d'extrados, et s'étend au-delà du bord d'attaque et/ou de fuite. Selon l'invention, le renfort (44) est fendu sur toute la longueur du bord d'attaque (46) et/ou de fuite, de manière à ce que le renfort soit séparé en deux plaques (44a, 44b) distinctes l'une de l'autre se faisant face de part et d'autre de la fente (48) au-delà du bord d'attaque et/ou de fuite. De plus, au moins une des plaques comprend en outre, au-delà du bord d'attaque et/ou de fuite, des moyens d'attache (50, 52) procurant une prise à cette même plaque.
Abstract:
A method and a device for evaluating the distribution and orientation of ferromagnetic, electrically conductive fibres in a composite material are disclosed. The principle consists in repeatable evaluation of the density of ferromagnetic, electrically conductive fibres at the measured location, and such evaluation is performed within a guaranteed scatter range of the measured data and at a guaranteed accuracy rate. A device to perform the method comprises a C, U or E-shaped ferromagnetic core (1) with distributed or uniform winding of the electric coil (2), where the ferromagnetic core (1) exhibits dimensions A, B, and C, for which we have C≥3B and B≈A, where A denotes the width of an arm (1.2), B represents the depth of an arm (1.2), and C is the length of the base (1.1). The ferromagnetic core (1) is equipped with at least two electric coils (2) and, to ensure strong electromagnetic coupling on the ferromagnetic core (1), the winding of the electric coil (2) is configured on both arms of the ferromagnetic core (1). The leads of the electric coil (2) winding are, at the winding terminals (3), connected to an external electric circuit (17) including an electric voltage generator (16) with adjustable frequency f and a measuring device (18).
Abstract:
Method of use of near infrared (NIR) spectroscopy for quantitative analysis of resin-wood composites, and methods of making engineered wood products using calibrated near infrared (NIR) spectroscopic instrumentation for quantitative analysis of resin- wood composites.
Abstract:
The disclosed technology relates to a method of selecting a material composition and/or designing an alloy. In one aspect, a method of selecting a composition of a material having a target property comprises receiving an input comprising thermodynamic phase data for a plurality of materials. The method additionally includes extracting from the thermodynamic phase data a plurality of thermodynamic quantities corresponding to each of the materials by a computing device. The extracted thermodynamic quantities are predetermined to have correlations to microstructures associated with physical properties of the material. The method additionally includes storing the extracted thermodynamic quantities in a computer-readable medium. The method further includes electronically mining the stored thermodynamic quantities using the computing device to rank at least a subset of the materials based on a comparison of at least a subset of the thermodynamic quantities that are correlated to the target property.
Abstract:
A system for measuring absorbed humidity in a composite material, including: an item (1) of composite material comprising a plurality of plies of material consolidated through the action of pressure and heat, wherein each ply of material is formed from a resin matrix reinforced with a fibre material, an insert (13) embedded in the composite material, which is positioned in an interface zone (15) between a first and a second (1 1, 12) ply of material, and in which at least one cavity (17) is formed, in fluid communication with first and second ply of material, and an ambient humidity sensor (20) positioned inside the cavity, and capable of providing a signal indicating the humidity content in the atmosphere present inside the cavity.
Abstract:
Method of use of near infrared (NIR) spectroscopy for quantitative analysis of resin-wood composites, and methods of making engineered wood products using calibrated near infrared (NIR) spectroscopic instrumentation for quantitative analysis of resin- wood composites.