Topological optimization design method for generating bracing structure in additive manufacturing

Abstract

The invention belongs to the technical field related to structure optimization design, and discloses a topological optimization design method for generating a bracing structure in additive manufacturing. The method comprises the following steps: (1) reading a three-dimension model of a product to obtain information such as geometric construction of the model; (2) generating a design region of a support structure according to parameters of product arrangement, and manufacturing equipment and a base plate to generate a design region of the support structure; (3) setting relevant material parameters, dividing grid, taking the material filling rate as a design variable, and setting objective functions and constrain conditions for topological optimization; and (4) performing topological optimization on the design region of the support structure by utilizing a topological optimization method and finally providing the optimal structure design scheme and related data. According to the method,generation of the support structure is taken as a topological optimization problem, and generation of the support structure can be performed according to the geometric structure and material performances of the product, thus reducing the possibilities of deformation and cracking caused during product manufacture and increasing the manufacture success rate.

Description

technical field [0001] The invention belongs to the related technical field of structure optimization design, and more specifically, relates to a topology optimization design method for supporting structure generation in additive manufacturing. Background technique [0002] Additive manufacturing, commonly known as 3D printing or rapid prototyping, was invented in the 1980s. Unlike traditional manufacturing processes, most additive manufacturing technologies are manufactured layer by layer by stacking materials. , additive manufacturing has developed rapidly in recent years and has been successfully applied to actual production. Support structure generation is an important design link in additive manufacturing. The support structure can not only constrain the deformation of the product, but also affect its thermal deformation and residual stress distribution by changing the thermal gradient of the product, preventing the product from deforming or cracking. It can effectivel...

AI Technical Summary

Problems solved by technology

The support scheme generated by the existing software adopts evenly distributed and uniformly sized support structures in many parts, and does not take into account that different parts have different requirements for the support structure due to differences in deformation and stress

Although the support structure scheme provided by the existing commercial software combined with the designer's personal experience can improve the success rate of manufacturing to a certain extent, from the perspective of mechanics, it has inherent defects, and there are also personal subjective factors. Perfectly and objectively provide support structure solutions, especially for products with complex shapes, experienced engineers often cannot give meaningful support forms

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