摘要:
Disclosed is a cast molded part made of a casting material that consists of three basic components, i.e. a) fiber rests, fiber scraps, grain rests, and/or straw-type residues of corn cobs after removing the corn grains, b) a finely ground mixture of mineral matter containing calcite, gypsum, quartz, and/or similar substances, and c) a synthetic resin such as epoxy, acrylic resin, and/or polyurethane resin. Basic component a) represents about 35 to 40 percent by volume, basic component b) about 18 to 24 percent by volume, and basic component c) 38 to 43 percent by volume of the total mixture.
摘要:
A flywheel (50) for use as an energy storage device is made of hoops of different fiber composite layers (56, 58, 60), the radial thickness of each hoop (56, 58, 60) and the physical properties of the fiber composite in each hoop (56, 58, 60) being chosen by a computer modeling optimization procedure to maximize total energy of storage while minimizing radial stress.
摘要:
A modular building comprising: a foundation floor having secured therein a plurality of anchor elements; a plurality of wall-retaining track elements adapted to engage wall panels of the building, the track elements being securable to the foundation floor so as to define the position of at least the load bearing walls of the building; wall panels locatable with respect to the track elements, each panel including at least one channel or duct formed therein parallel to a longitudinal axis thereof and at least one channel or duct formed therein disposed perpendicularly to and laterally of the longitudinal axis; and a plurality of securing members adapted to pass through and locatable within said channels or ducts, the securing members being anchored at each end thereof so as to maintain the panels in fixed relationship to one another.
摘要:
The invention relates to a method for producing a flat strip in which a supporting fiber fabric comprised of a multitude of parallelly aligned supporting fibers that are interwoven with cross fibers is embedded in a binder matrix made of synthetic material. According to the invention, the supporting fiber fabric (38) is stiffened using a binder matrix made of thermoplastic material and is sealed against liquid penetration. In order to form the binder matrix, the supporting fiber fabric (38) can be pressed together with a film (40', 40'') made of thermoplastic material, heated and cooled again. In an alternative embodiment, the supporting fiber fabric (38) is firstly impregnated with a preferably aqueous thermoplastic suspension (52) and is subsequently heated while vaporizing the water and melting the thermoplastic material and is cooled again while forming the solidified binder matrix.
摘要:
A hybrid material comprising a substrate (1) prepared by curing a fabricated material made of a mixture of one or more kinds of organic binders and at least one kind of inorganic powders, and at least one unidirectional fiber layer (2) which is comprised from one or more kinds of fibers, adhered to at least one of outer surfaces of the substrate by resin impregnation, wherein Ef/Es satisfies the following relational formula (1): Ef/Es > 1 and Ef . tf/Es . ts satisfies the following relational formula (2): Ef/Es >/= Ef . tf/Es . ts >/= 0.15 where Ef is bending modulus of elasticity of the resin impregnated unidirectional fiber layer, Es is bending modulus of elasticity of the substrate, tf is thickness of resin impregnated unidirectional fiber layer and ts is thickness of the substrate. Therefore, the hybrid material excels in bending strength, tensile strength, fatigue strength and impact strength.
摘要:
The invention relates to a laid-yarn fabric serving as a reinforcement material in the manufacture of fibre composites, and comprising a connecting thread system and reinforcement threads (2) inserted into said thread system. The laid-yarn fabric forms a transversely elastic tube-like means (1) which is arranged to be passed over a core in order to form or to be comprised in said fibre composite. The invention likewise concerns a method of producing preforms for the manufacture of fibre composites, using such a transversely elastic, tube-like laid-yarn fabric. The laid-yarn fabric is applied on a core by the tube-like means (1) being passed over said core in such a manner that said tube-like means (1), on account of its transverse elasticity, drapes itself closely about said core. The laid-yarn fabric is then injected with thermosetting plastics, alternatively is heated, if the fabric is made from thermoplastic hybrid yarns.
摘要:
The invention concerns a caring doctor blade for a paper/board machine, which blade comprises layers of fibreglass and carbon fibre and a caring layer as a rigid laminated structure, which caring layer comprises carbon fibres and grinding particles in direct vicinity of the carbon fibres. The orientation of the fibreglass layers is parallel to the longitudinal axis of the blade, and at least in some of the layers that contain carbon fibre the orientation of the carbon fibres is substantially diverging from the direction of the longitudinal axis of the blade. The invention also concerns a method for manufacture of a doctor blade for a paper/board machine by means of a pultrusion method.
摘要:
A prepreg fabric at least comprising [A] a reinforcing fabric, [B] a thermosetting resin or a thermosetting resin composition and [C] fine resin particles, which is characterized by having a cover factor of 95 % or above; and a sandwich panel characterized by comprising skin panels made from the prepreg fabric and [D] a honeycomb core. The prepreg fabric is little changed in the tack as prepreg after the lapse of time, has suitable drape properties (flexibility) and exhibits excellent self-bondability to ahoneycomb core when used as the skin panel of a honeycomb sandwich panel, and the honeycomb sandwich panel is advantageous in that the skin panels made of a product of curing of the prepreg fabric have a lowered inner porosity and that the skin panels have few holes and depressions on their surfaces and are thus excellent in surface smoothness.
摘要:
A sound attenuation material includes a plurality of particles, each having a core and an elastic or compliant coating around the core, and a matrix surrounding the plurality of particles, the matrix being less dense than the core. A method of manufacturing sound attenuating materials includes adding an elastic or compliant coating to core particles and drying the coating, mixing the coated core particles into a matrix material, and pouring the mixture into a mold. The core particles are denser than the matrix material.
摘要:
Process for the production of a glass fiber reinforced polymer tape, comprising the subsequent steps of a) unwinding from a package of at least one continuous glass multifilament strand; b) applying the impregnating agent to said strands to form the impregnated continuous multifilament strands; c) applying a sheath of thermoplastic polymer around said multifilament strand to form a sheathed continuous multifilament strand, wherein wherein the tex number of the glass multifilament strand is in the range from 520 to 980, the amount of the at least one continuous glass multifilament strand in the composition is from 55 to 70 wt-% on the basis of the total weight of the composition; d) providing the plurality of sheathed continuous multifilament strands obtained in step c); e) placing the plurality of sheathed continuous multifilament strands in parallel alignment in the longitudinal direction; f) grouping the plurality of sheathed continuous multifilament strands; wherein steps e) and f) are performed such that the sheathed continuous multifilament strand can be consolidated; and g) subsequently consolidating the plurality of sheathed continuous multifilament strands to form a tape.