用混合神经表示生成精准匹配性能需求的微结构,提升设计多样性与几何有效性。
MIND: Microstructure INverse Design with Generative Hybrid Neural Representation
- 融合潜空间扩散与全息平面表示,联合建模几何与物理属性。
- 在多类微结构上实现目标性能达标率超现有方法,几何合法性显著提升。
- 适合材料逆向设计、增材制造及复杂结构集成的研究者使用。
微结构逆向设计在优化具有特定物理性能的超材料中至关重要。传统正向设计受限于难以探索庞大的组合设计空间,而逆向设计可通过直接生成满足预设性能标准的结构提供有效替代方案。然而,由于几何与材料属性之间的复杂耦合,实现对两者的同时精确控制仍是重大挑战。现有方法多依赖体素或参数化表示,限制了设计灵活性与结构多样性。本文提出一种新型生成模型,将潜空间扩散与Holoplane——一种先进的混合神经表示相结合,可同时编码几何与物理属性,确保几何与性能的高度对齐。该方法泛化能力强,适用于多种微结构类别,能生成多样且可拼接的微结构,显著提升属性精度与几何有效性,超越现有方法。我们构建了一个包含桁架、壳体、管状和板状等多种几何形态的多类别数据集,用于模型训练与验证。实验表明,该模型可生成满足目标性能、保持几何合法性的微结构,并可无缝集成至复杂装配中。此外,我们通过生成新结构、跨类别插值及异质微结构填充展示了框架潜力。数据集与源代码将在发表后开源。
原文摘要 · Abstract (English)
The inverse design of microstructures plays a pivotal role in optimizing metamaterials with specific, targeted physical properties. While traditional forward design methods are constrained by their inability to explore the vast combinatorial design space, inverse design offers a compelling alternative by directly generating structures that fulfill predefined performance criteria. However, achieving precise control over both geometry and material properties remains a significant challenge due to their intricate interdependence. Existing approaches, which typically rely on voxel or parametric representations, often limit design flexibility and structural diversity. In this work, we present a novel generative model that integrates latent diffusion with Holoplane, an advanced hybrid neural representation that simultaneously encodes both geometric and physical properties. This combination ensures superior alignment between geometry and properties. Our approach generalizes across multiple microstructure classes, enabling the generation of diverse, tileable microstructures with significantly improved property accuracy and enhanced control over geometric validity, surpassing the performance of existing methods. We introduce a multi-class dataset encompassing a variety of geometric morphologies, including truss, shell, tube, and plate structures, to train and validate our model. Experimental results demonstrate the model's ability to generate microstructures that meet target properties, maintain geometric validity, and integrate seamlessly into complex assemblies. Additionally, we explore the potential of our framework through the generation of new microstructures, cross-class interpolation, and the infilling of heterogeneous microstructures. The dataset and source code will be open-sourced upon publication.
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