A deep learning approach to estimate stress distribution: a fast and accurate surrogate of finite-element analysis

Structural finite-element analysis (FEA) has been widely used to study the biomechanics of human tissues and organs, as well as tissue-medical device interactions, and treatment strategies. However, patient-specific FEA models usually require complex procedures to set up and long computing times to...

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Bibliographic Details
Published in:Journal of the Royal Society interface Vol. 15; no. 138
Main Authors: Liang, Liang, Liu, Minliang, Martin, Caitlin, Sun, Wei
Format: Journal Article
Language:English
Published: England 01.01.2018
Subjects:
deep learning
finite-element analysis
neural network
stress analysis
ISSN:1742-5662, 1742-5662
Online Access:Get more information
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Summary:Structural finite-element analysis (FEA) has been widely used to study the biomechanics of human tissues and organs, as well as tissue-medical device interactions, and treatment strategies. However, patient-specific FEA models usually require complex procedures to set up and long computing times to obtain final simulation results, preventing prompt feedback to clinicians in time-sensitive clinical applications. In this study, by using machine learning techniques, we developed a deep learning (DL) model to directly estimate the stress distributions of the aorta. The DL model was designed and trained to take the input of FEA and directly output the aortic wall stress distributions, bypassing the FEA calculation process. The trained DL model is capable of predicting the stress distributions with average errors of 0.492% and 0.891% in the Von Mises stress distribution and peak Von Mises stress, respectively. This study marks, to our knowledge, the first study that demonstrates the feasibility and great potential of using the DL technique as a fast and accurate surrogate of FEA for stress analysis.
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ISSN:1742-5662
1742-5662
DOI:10.1098/rsif.2017.0844