2results about How to "Reliable mechanical properties" patented technology

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.