请帮我进行语言润色:点阵结构是一种具有桁架结构的蜂窝材料可以根据特定的荷载条件进行优化。其复杂结构的制造受到传统制造技术的限制。然而增材制造AM可以通过一层一层地聚合材料来制造复杂结构从而释放了点阵结构的潜力。在过去的十年中点阵结构在增材技术的设计、仿真和制造方面得到了相当多的研究关注并提出了不同的建模方法来预测晶格结构的力学性能。本文主要研究内容概述如下:首先研究隐式几何造型与参数化点阵建模方法
The lattice structure is a honeycomb material with a truss structure that can be optimized based on specific load conditions. The manufacturing of its complex structure is limited by traditional manufacturing techniques. However, additive manufacturing (AM) can manufacture complex structures by layer-by-layer material aggregation, thereby unleashing the potential of lattice structures. Over the past decade, lattice structures have received considerable research attention in the design, simulation, and manufacturing of additive technology, and different modeling methods have been proposed to predict the mechanical properties of lattice structures. This article provides an overview of the main research content as follows:
Firstly, implicit geometric modeling and parameterized lattice modeling methods are studied, and programming is carried out on the MATLAB platform. Constructive solid geometry (CSG) is used to perform Boolean operations on basic level set functions through K-S (Kreisselmeier-Steinhauser) functions to construct complex and parameterizable computer graphics models. A parameterized control method for the geometric characteristics of the lattice single cell based on the geometric center of the lattice single cell is established, and a parameterized lattice is obtained by designing an array or distribution of the lattice single cell center. By controlling the geometric characteristics of the regular lattice structure in matrix form, a simple gradient-changing lattice structure can be achieved.
Secondly, lattice filling design is carried out for two design objects: a tensile test specimen with an elliptical cavity in the center and a hook. In addition to the above-mentioned regular lattice structure filling design, we also use isoparametric mapping to map the regular mother cell to an arbitrary quadrilateral patch mesh in the design space domain to obtain a conformal lattice structure, which solves the problem of overly fine geometric features that inevitably occur during regular lattice filling design. We also propose an implementation process for the manufacturing model and simulation model of implicit geometry, obtaining two models that can be applied in practice in addition to the visualization model.
Finally, mechanical performance experiments and simulations of conformal lattice structures are conducted using the above simulation and manufacturing models to verify the effectiveness of the proposed design process. According to the experimental results, the simulation and manufacturing models generated by this method have similar mechanical properties. The method proposed in this article can be applied to subsequent lightweight or high-performance lattice filling optimization design research, such as temperature-based gradient conformal lattice structures
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