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arXiv · 2112.08676

Machine Learning-Accelerated Computational Solid Mechanics: Application to Linear Elasticity

Rajat Arora
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Abstract

This work presents a novel physics-informed deep learning based super-resolution framework to reconstruct high-resolution deformation fields from low-resolution counterparts, obtained from coarse mesh simulations or experiments. We leverage the governing equations and boundary conditions of the physical system to train the model without using any high-resolution labeled data. The proposed approach is applied to obtain the super-resolved deformation fields from the low-resolution stress and displacement fields obtained by running simulations on a coarse mesh for a body undergoing linear elastic deformation. We demonstrate that the super-resolved fields match the accuracy of an advanced numerical solver running at 400 times the coarse mesh resolution, while simultaneously satisfying the governing laws. A brief evaluation study comparing the performance of two deep learning based super-resolution architectures is also presented.

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Rajat Arora. 2021-12-16. Machine Learning-Accelerated Computational Solid Mechanics: Application to Linear Elasticity. https://arxiv.org/abs/2112.08676

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