Lattice model multiphase reinforcement optimization method based on field data driving

Abstract

The invention discloses a lattice model multiphase reinforcement optimization method based on field data driving. The method specifically comprises the following steps: 1) constructing an initial lattice model of a single lattice type; 2) acquiring stress field data information of the dot matrix model; 3) calculating an equivalent stress value of each cell element in the initial lattice model; 4)normalizing the equivalent stress value of each cell element; and 5) distinguishing the cell elements needing strengthening treatment from the cell elements not needing strengthening treatment, performing secondary topology on the topological relation of the cell elements needing strengthening treatment, and maintaining the original topological relation of the cell elements not needing strengthening treatment, thereby realizing strengthening of the dot matrix model. According to the invention, a good matching relationship is established between the attribute characteristics of each cell element in the optimization model and the stress field data information of the initial lattice model when the initial lattice model is loaded, and the multiphase reinforced lattice model designed by the invention provides a novel visual angle for the optimization of the mechanical properties of the homogeneous lattice structure.

Description

Technical field[0001]The invention belongs to the field of additive manufacturing.Background technique[0002]The rapid development of additive manufacturing technology has led to the rapid rise of lattice structures that have excellent mechanical properties such as ultra-lightweight and high-strength, as well as special properties such as noise reduction and heat dissipation, which provide new methods and approaches for lightweight design of parts. However, the homogeneous lattice structure often has the problem that the mechanical properties cannot be fully utilized.[0003]At this stage, the main schemes for improving the mechanical properties of the lattice structure are as follows:[0004]1) Optimized design scheme of variable density lattice structure driven by field data;[0005]2) Optimized design scheme of conformal lattice structure based on principal stress line drive;[0006]3) Optimize the design scheme by adjusting the size and number of the multi-level lattice structure of the ...

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Problems solved by technology

[0009] The above-mentioned schemes often have only one lattice type in the process of realizing their optimization, and the lattice structure of a single lattice type, especially the homogeneous lattice structure of a single lattice type, often has local high Stress shear bands that cause rapid, irreversible and destructive failure when loaded beyond the yield strength, resulting in a sharp drop in load carrying capacity

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