Deformation-controllable four-dimension (4D) printing method for composite material embedded with continuous fiber

Abstract

The invention provides a deformation-controllable four-dimension (4D) printing method for a composite material embedded with a continuous fiber. The printing method comprises the steps that the principal curvature and the principal curvature line of a to-be-deformed curved plane are solved; then fiber trajectory is solved through the length-keeping and transforming theory and differential geometrytheory; planning is conducted on the fiber trajectory, a solution is acquired through a Matlab software, and route points passed by the fiber in the printing process are acquired; a bottomed resin material is printed first; then a top material formed by the resin and a fiber distributed along route trajectory is printed; heat treatment is conducted on the material acquired from printing; and thecomposite material can be deformed into an expectant shape. According to the deformation-controllable 4D printing method for the composite material embedded with the continuous fiber, controllable deformation of any developable curved plane shape can be achieved; and because of high controllability of fiber orientation, the composite material is provided with quite high deformation precision.

Description

technical field [0001] The invention relates to the technical field of 4D printing, in particular to a 4D printing method of controllable deformation of continuous fibers embedded in composite materials. Background technique [0002] In recent years, with the development and maturity of 3D printing technology, people are not only satisfied with the design of the printing shape, but also hope that through the heterogeneous regulation of the material composition and content of the printing material, the traditional processing method cannot bring The functional characteristics of the material enable the material to have controllable self-deformation capabilities. This technology is also known as 4D printing technology. It has potential application value in the field of smart materials, soft robots and other fields. [0003] The current 4D printing technology mainly adopts three schemes: the first one is to use the shape memory characteristics of a single material (mainly shape...

AI Technical Summary

Problems solved by technology

[0003] The current 4D printing technology mainly adopts three schemes: the first one is to use the shape memory characteristics of a single material (mainly shape memory materials) to realize deformation. Although this material has a faster response speed and higher forming accuracy, However, its deformation process is discontinuous, and only one or several final shapes exist, so the controllability and designability of the deformation process cannot be realized.

The second type is a heterogeneous structure composed of two or more materials (mainly hydrogel + short fiber materials), which will bend and deform during the process of absorbing water and swelling. Although this process has achieved certain The controllability of the deformation, but the shape of the deformation is relatively simple, and its design is poor

In addition, there is currently no systematic design method for the controllable deformation of continuous fiber composite materials to support it, and there is no matching continuous fiber composite material 4D printing method

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