A kind of variable rigidity composite vehicle frame preparation method and the vehicle frame prepared therewith

Abstract

The present invention mainly relates to a method for preparing a composite vehicle frame with variable stiffness, which includes the following steps: (1) Cutting several layers of fiber cloth pre-soaked material according to the overall length of the longitudinal beam, the unfolded width of the U-shaped section and the overall thickness of the longitudinal beam, The layering angle of the fiber cloth pre-impregnated material is determined according to the strength check result, including the layering angles of 0°, 45°, and 90°; (2) According to the size required by the stiffness driver, the proposed planting is prepared by a three-dimensional weaving machine The rigidity driver inserted into the longitudinal beam of composite material is a three-dimensional braid containing shape memory alloy wire; the warp yarn of the three-dimensional braid is shape memory alloy wire, and the weft yarn and binding yarn are reinforcing fibers; the vehicle designed by this method The frame has the active stiffness control function, which can realize the active control of the key stiffness characteristics of the frame according to different load conditions, which not only improves the light weight and comfort level of the vehicle, but also greatly improves the safety of the vehicle.

Description

technical field [0001] The invention belongs to the field of automobile frames, and in particular relates to a method for preparing a variable rigidity composite frame and the prepared frame. Background technique [0002] The use of fiber-reinforced resin-based composite materials to manufacture auto parts can not only significantly reduce the weight of the car, reduce fuel consumption, improve the comfort of the car, but also play a good role in energy saving and emission reduction, and significantly increase the cruising range of new energy vehicles. The frame is an important load-bearing element widely used in the automobile chassis system. For vehicles with non-load-bearing body structures such as commercial vehicles and buses, the weight of the frame accounts for a large proportion of the weight of the vehicle, and directly affects the stiffness and load-carrying capacity of the vehicle, which in turn affects the safety and comfort of the vehicle . The composite frame...

AI Technical Summary

Problems solved by technology

Under the premise of a certain frame rigidity, if the fully loaded cargo is offset, it will not only cause excessive deformation of the suspension elastic elements, resulting in body roll, which will cause rollover of commercial vehicles or buses, but also cause abnormal deformation of the frame, causing The frame vibrates abnormally or even breaks, causing vibration and noise problems or safety accidents

Images