5results about How to "Reliable mechanical properties" patented technology

The invention relates to a large-displacement tensile device and a design method. The tensile device comprises a self-adaptive base, a tensile cable group, a first seat plate and a second seat plate, the self-adaptive base comprises a first tensile base, a second tensile base, a spring base and a self-adaptive spring; the first tensile base is arranged on the first seat plate; one end of the self-adaptive spring is connected with the first tensile base, and the other end of the self-adaptive spring is connected with the spring base; the second tensile base is connected with the second seat plate; and the tensile cable group penetrates through the first tensile base and the second tensile base to form a closed loop. Compared with the prior art, the tensile device can provide good vertical tensile capacity for the support in a limited space of an existing support system, and has the characteristics of multi-directional horizontal large-displacement adaptability, good fatigue resistance and stable and reliable mechanical property.

This invention discloses a highly conductive carbon fiber composite material and its preparation method. The highly conductive carbon fiber composite material includes a composite matrix and a conductive layer located on the surface of the composite matrix. The conductive layer is made of metal. The composite matrix is ​​obtained by sequentially laying a first ply and a second ply, followed by molding. The first ply includes at least one layer of first prepreg, and the second ply includes at least one layer of second prepreg. The first prepreg is made by mixing carbon fiber and conductive resin, and the second ply is made by mixing metallized carbon fiber and conductive resin. The metallized carbon fiber is carbon fiber with a metal coating on its surface, and the conductive layer is disposed on the surface of the second ply. The carbon fiber composite material of this invention uses metallized carbon fiber and conductive resin in the matrix, which significantly improves the conductivity to meet the requirements of electrostatic protection and lightning protection, while retaining the advantages of lightweight and high strength of carbon fiber composite materials. Furthermore, the materials are firmly bonded together, and the mechanical properties are stable and reliable.

The application discloses an optimization method of a rolling wing blade connecting rod mechanism, and belongs to the field of rolling wing aircrafts.The blade swing angle is represented by structural parameters of the blade connecting rod mechanism, and the structural parameters of the blade connecting rod mechanism, including the lengths of the connecting rods, the coordinates of key hinge points and configuration bias, are defined as a variable vector; multiple target functions are constructed for multiple key working conditions such as hovering, forward flight and transition, the multiple target functions not only quantify the performance of the connecting rod mechanism itself, such as kinematic fitting error with a target motion law, dynamic stability index and force transmission efficiency index, but also cover aerodynamic efficiency index and aerodynamic acoustic index which are directly related to the performance of the whole machine; and the optimal structural parameters of the blade connecting rod mechanism are obtained by solving the multiple target functions under constraints, so that the global optimization of the structural parameters of the blade connecting rod mechanism under multiple working conditions, multiple targets and multiple constraints can be realized.

The embodiment of the present invention provides an anti-buckling restraint support structure, including a core material and a restraint member coated on the outside of the core material, and also including a transition connector and a connecting ear plate, wherein the core material is a steel rod with a circular cross section, the outer surface of the core material end is provided with a thread, a stepped blind hole with a two-stage structure is opened along the axial direction at the center of the first end face of the transition connector, a thread matching the thread on the outer surface of the core material end is provided on the inner surface of the inner section of the stepped blind hole, and an adhesive material is filled between the outer section of the stepped blind hole and the core material after the transition connector is threadedly connected to the core material, and the connecting ear plate is provided on the transition connector. The solution provided by the embodiment of the present invention adopts a steel rod with a circular cross section as the core material, which can reduce material loss and processing cost; the transition connector and the core material adopt a composite connection structure of threads and adhesive materials, which can play a transition and connection role for the core material end, and the mechanical properties are stable and reliable.

The invention discloses a method for preparing foam glass by using diatomite with high organic matter content, and particularly relates to the technical field of building materials. The invention aims to utilize abundant residual organic matters in diatomite with high organic matter content as a natural pore-forming agent and utilize a porous structure of a diatomite algae disc to obtain high-quality foam glass. The preparation method of the foam glass comprises the following steps: (1) respectively grinding the waste glass and the diatomite to a certain fineness level; (2) uniformly mixing glass powder, diatomite, a small amount of foaming agent and foam stabilizer according to a certain proportion; (3) forming the mixture; and (4) firing and foaming, and then annealing according to a certain temperature gradient. The foamed glass is low in raw material cost, simple in process and suitable for batch production, the problem that waste glass and low-grade high-organic-matter-content diatomite cannot be fully utilized is solved, and the obtained foamed glass is excellent in quality, high in porosity and sound absorption coefficient and firm in texture and is a good heat-preservation, sound-absorption and fireproof material.