arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2304.00616cond-mat.mtrl-sci
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用于本构关系建模的鲁棒深度学习框架

Robust Deep Learning Framework for Constitutive-Relation Modeling

Qing-Jie Li, Mahmut Nedim Cinbiz, Yin Zhang, Qi He, Geoffrey Beausoleil, Ju Li

AI总结:

针对复杂条件下材料变形的本构关系建模难题,提出通用的编码器-解码器深度学习框架,利用GRU、TCN和Transformer等架构处理高维应力-应变数据,实现低于1 MPa的RMSE,并提供域外预测的不确定性估计,为材料设计提供鲁棒替代方案。

摘要:

在复杂加载与材料条件下对材料全范围变形行为进行建模,是本构关系(Constitutive Relations, CRs)建模面临的重大挑战。我们提出了一种通用的编码器-解码器深度学习框架,能够以鲁棒性和通用能力对高维应力-应变数据及复杂加载历史进行建模。该框架采用编码器将高维输入信息(如加载历史、加载条件和材料信息)投影至低维隐空间,并采用解码器将隐表示映射至目标应力。我们在两个复杂的应力-应变数据集上评估了多种编码器架构,包括门控循环单元(GRU)、带注意力机制的GRU、时间卷积网络(TCN)以及Transformer编码器,这些数据集旨在涵盖广泛的复杂加载历史与加载条件。所有架构均取得了优异的测试结果,RMSE低于1 MPa。此外,我们分析了不同架构在域外应用中进行预测的能力,并基于深度集成进行了不确定性估计。所提方法为CRs建模的经验/半经验模型提供了鲁棒的替代方案,为更准确高效的材料设计与优化提供了潜力。

英文摘要:

Modeling the full-range deformation behaviors of materials under complex loading and materials conditions is a significant challenge for constitutive relations (CRs) modeling. We propose a general encoder-decoder deep learning framework that can model high-dimensional stress-strain data and complex loading histories with robustness and universal capability. The framework employs an encoder to project high-dimensional input information (e.g., loading history, loading conditions, and materials information) to a lower-dimensional hidden space and a decoder to map the hidden representation to the stress of interest. We evaluated various encoder architectures, including gated recurrent unit (GRU), GRU with attention, temporal convolutional network (TCN), and the Transformer encoder, on two complex stress-strain datasets that were designed to include a wide range of complex loading histories and loading conditions. All architectures achieved excellent test results with an RMSE below 1 MPa. Additionally, we analyzed the capability of the different architectures to make predictions on out-of-domain applications, with an uncertainty estimation based on deep ensembles. The proposed approach provides a robust alternative to empirical/semi-empirical models for CRs modeling, offering the potential for more accurate and efficient materials design and optimization.

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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