Physics-informed neural networks for heterogeneous poroelastic media
Journal Article
·
· International Journal for Computational Methods in Engineering Science and Mechanics
- Indian Inst. of Technology (IIT), Madras (India)
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- ExxonMobil Technology and Engineering, Spring, TX (United States)
This study presents a novel physics-informed neural network (PINN) framework for modeling poroelasticity in heterogeneous media with material interfaces. The approach introduces a composite neural network (CoNN) where separate neural networks predict displacement and pressure variables for each material. While sharing identical activation functions, these networks are independently trained for all other parameters. To address challenges posed by heterogeneous material interfaces, the CoNN is integrated with the Interface-PINNs (I-PINNs) framework (Sarma et al., Comput. Methods Appl. Mech. Eng. 429: 117135, 2024), allowing different activation functions across material interfaces. Further, this ensures accurate approximation of discontinuous solution fields and gradients. Performance and accuracy of this combined architecture were evaluated against the conventional PINNs approach, a single neural network (SNN) architecture, and the eXtended PINNs (XPINNs) framework through two one-dimensional benchmark examples with discontinuous material properties. The results show that the proposed CoNN with I-PINNs architecture achieves an RMSE that is two orders of magnitude better than the conventional PINNs approach and is at least 40 times faster than the SNN framework. Compared to XPINNs, the proposed method achieves an RMSE at least one order of magnitude better and is 40% faster.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 2556941
- Report Number(s):
- LLNL--JRNL-860569; 1091510
- Journal Information:
- International Journal for Computational Methods in Engineering Science and Mechanics, Journal Name: International Journal for Computational Methods in Engineering Science and Mechanics Journal Issue: 2 Vol. 26; ISSN 1550-2287
- Publisher:
- Taylor & FrancisCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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