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arXiv 2004.04814cond-mat.mtrl-scics.LG
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深度学习在异构含能材料按材料设计框架中的微观结构生成中的应用

Deep learning for synthetic microstructure generation in a materials-by-design framework for heterogeneous energetic materials

University of Iowa(爱荷华大学)

Sehyun Chun, Sidhartha Roy, Yen Thi Nguyen, Joseph B. Choi, H. S. Udaykumar, Stephen S. Baek

AI总结:

该研究提出利用生成对抗网络生成异构含能材料微观结构,实现孔隙率可控的新形态生成,为按需设计材料性能提供方法。

摘要:

异构含能(HE)材料(推进剂、炸药和烟火剂)的敏感性关键取决于其微观结构。化学反应的点火发生在热点处,这是由于能量在孔隙和其他缺陷位置处的局部化。新兴的多尺度预测模型用于描述HE材料对载荷的响应,考虑了介观尺度(即微观结构中粒子和其它特征的统计代表性团簇的尺度)的物理过程。介观尺度物理被注入到机器学习闭合模型中,这些模型由已解析的介观尺度模拟提供信息。由于微观结构是随机的,需要介观尺度模拟的集合来量化热点点火和增长,并开发依赖于微观结构的能量沉积速率的模型。我们提出利用生成对抗网络(GAN)来生成异构含能材料微观结构的合成集合。该方法通过学习HE微观结构的图像,生成定性和定量上逼真的微观结构。我们表明,所提出的GAN方法还允许生成新的形态,其中孔隙率分布可以被控制并进行空间操作。这种控制为设计新型微观结构铺平了道路,以便在材料按设计框架中针对目标性能工程化HE材料。

英文摘要:

The sensitivity of heterogeneous energetic (HE) materials (propellants, explosives, and pyrotechnics) is critically dependent on their microstructure. Initiation of chemical reactions occurs at hot spots due to energy localization at sites of porosities and other defects. Emerging multi-scale predictive models of HE response to loads account for the physics at the meso-scale, i.e. at the scale of statistically representative clusters of particles and other features in the microstructure. Meso-scale physics is infused in machine-learned closure models informed by resolved meso-scale simulations. Since microstructures are stochastic, ensembles of meso-scale simulations are required to quantify hot spot ignition and growth and to develop models for microstructure-dependent energy deposition rates. We propose utilizing generative adversarial networks (GAN) to spawn ensembles of synthetic heterogeneous energetic material microstructures. The method generates qualitatively and quantitatively realistic microstructures by learning from images of HE microstructures. We show that the proposed GAN method also permits the generation of new morphologies, where the porosity distribution can be controlled and spatially manipulated. Such control paves the way for the design of novel microstructures to engineer HE materials for targeted performance in a materials-by-design framework.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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