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Title: StressNet - Deep learning to predict stress with fracture propagation in brittle materials

Abstract

Abstract Catastrophic failure in brittle materials is often due to the rapid growth and coalescence of cracks aided by high internal stresses. Hence, accurate prediction of maximum internal stress is critical to predicting time to failure and improving the fracture resistance and reliability of materials. Existing high-fidelity methods, such as the Finite-Discrete Element Model (FDEM), are limited by their high computational cost. Therefore, to reduce computational cost while preserving accuracy, a deep learning model, StressNet, is proposed to predict the entire sequence of maximum internal stress based on fracture propagation and the initial stress data. More specifically, the Temporal Independent Convolutional Neural Network (TI-CNN) is designed to capture the spatial features of fractures like fracture path and spall regions, and the Bidirectional Long Short-term Memory (Bi-LSTM) Network is adapted to capture the temporal features. By fusing these features, the evolution in time of the maximum internal stress can be accurately predicted. Moreover, an adaptive loss function is designed by dynamically integrating the Mean Squared Error (MSE) and the Mean Absolute Percentage Error (MAPE), to reflect the fluctuations in maximum internal stress. After training, the proposed model is able to compute accurate multi-step predictions of maximum internal stress in approximately 20 seconds,more » as compared to the FDEM run time of 4 h, with an average MAPE of 2% relative to test data.« less

Authors:
ORCiD logo; ; ORCiD logo; ; ORCiD logo; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1765066
Alternate Identifier(s):
OSTI ID: 1822735
Report Number(s):
LA-UR-19-31067
Journal ID: ISSN 2397-2106; 6; PII: 151
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Published Article
Journal Name:
npj Materials Degradation
Additional Journal Information:
Journal Name: npj Materials Degradation Journal Volume: 5 Journal Issue: 1; Journal ID: ISSN 2397-2106
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; Computational methods; mechanical engineering

Citation Formats

Wang, Yinan, Oyen, Diane, Guo, Weihong, Mehta, Anishi, Scott, Cory Braker, Panda, Nishant, Fernández-Godino, M. Giselle, Srinivasan, Gowri, and Yue, Xiaowei. StressNet - Deep learning to predict stress with fracture propagation in brittle materials. United Kingdom: N. p., 2021. Web. doi:10.1038/s41529-021-00151-y.
Wang, Yinan, Oyen, Diane, Guo, Weihong, Mehta, Anishi, Scott, Cory Braker, Panda, Nishant, Fernández-Godino, M. Giselle, Srinivasan, Gowri, & Yue, Xiaowei. StressNet - Deep learning to predict stress with fracture propagation in brittle materials. United Kingdom. https://doi.org/10.1038/s41529-021-00151-y
Wang, Yinan, Oyen, Diane, Guo, Weihong, Mehta, Anishi, Scott, Cory Braker, Panda, Nishant, Fernández-Godino, M. Giselle, Srinivasan, Gowri, and Yue, Xiaowei. Wed . "StressNet - Deep learning to predict stress with fracture propagation in brittle materials". United Kingdom. https://doi.org/10.1038/s41529-021-00151-y.
@article{osti_1765066,
title = {StressNet - Deep learning to predict stress with fracture propagation in brittle materials},
author = {Wang, Yinan and Oyen, Diane and Guo, Weihong and Mehta, Anishi and Scott, Cory Braker and Panda, Nishant and Fernández-Godino, M. Giselle and Srinivasan, Gowri and Yue, Xiaowei},
abstractNote = {Abstract Catastrophic failure in brittle materials is often due to the rapid growth and coalescence of cracks aided by high internal stresses. Hence, accurate prediction of maximum internal stress is critical to predicting time to failure and improving the fracture resistance and reliability of materials. Existing high-fidelity methods, such as the Finite-Discrete Element Model (FDEM), are limited by their high computational cost. Therefore, to reduce computational cost while preserving accuracy, a deep learning model, StressNet, is proposed to predict the entire sequence of maximum internal stress based on fracture propagation and the initial stress data. More specifically, the Temporal Independent Convolutional Neural Network (TI-CNN) is designed to capture the spatial features of fractures like fracture path and spall regions, and the Bidirectional Long Short-term Memory (Bi-LSTM) Network is adapted to capture the temporal features. By fusing these features, the evolution in time of the maximum internal stress can be accurately predicted. Moreover, an adaptive loss function is designed by dynamically integrating the Mean Squared Error (MSE) and the Mean Absolute Percentage Error (MAPE), to reflect the fluctuations in maximum internal stress. After training, the proposed model is able to compute accurate multi-step predictions of maximum internal stress in approximately 20 seconds, as compared to the FDEM run time of 4 h, with an average MAPE of 2% relative to test data.},
doi = {10.1038/s41529-021-00151-y},
journal = {npj Materials Degradation},
number = 1,
volume = 5,
place = {United Kingdom},
year = {Wed Feb 10 00:00:00 EST 2021},
month = {Wed Feb 10 00:00:00 EST 2021}
}

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