Search Results for author: Jiun-Shyan Chen

Found 7 papers, 1 papers with code

A Neural Network-Based Enrichment of Reproducing Kernel Approximation for Modeling Brittle Fracture

no code implementations4 Jul 2023 Jonghyuk Baek, Jiun-Shyan Chen

In the proposed method, a background reproducing kernel (RK) approximation defined on a coarse and uniform discretization is enriched by a neural network (NN) approximation under a Partition of Unity framework.

Unity

Certified data-driven physics-informed greedy auto-encoder simulator

1 code implementation24 Nov 2022 Xiaolong He, Youngsoo Choi, William D. Fries, Jonathan L. Belof, Jiun-Shyan Chen

A parametric adaptive greedy Latent Space Dynamics Identification (gLaSDI) framework is developed for accurate, efficient, and certified data-driven physics-informed greedy auto-encoder simulators of high-dimensional nonlinear dynamical systems.

Deep autoencoders for physics-constrained data-driven nonlinear materials modeling

no code implementations3 Sep 2022 Xiaolong He, Qizhi He, Jiun-Shyan Chen

In this study, the applicability of the proposed approach is demonstrated by modeling nonlinear biological tissues.

Thermodynamically Consistent Machine-Learned Internal State Variable Approach for Data-Driven Modeling of Path-Dependent Materials

no code implementations1 May 2022 Xiaolong He, Jiun-Shyan Chen

Characterization and modeling of path-dependent behaviors of complex materials by phenomenological models remains challenging due to difficulties in formulating mathematical expressions and internal state variables (ISVs) governing path-dependent behaviors.

A Neural Network-enhanced Reproducing Kernel Particle Method for Modeling Strain Localization

no code implementations28 Apr 2022 Jonghyuk Baek, Jiun-Shyan Chen, Kristen Susuki

In this work, neural network-enhanced reproducing kernel particle method (NN-RKPM) is proposed, where the location, orientation, and shape of the solution transition near a localization is automatically captured by the NN approximation via a block-level neural network optimization.

gLaSDI: Parametric Physics-informed Greedy Latent Space Dynamics Identification

no code implementations26 Apr 2022 Xiaolong He, Youngsoo Choi, William D. Fries, Jon Belof, Jiun-Shyan Chen

To maximize and accelerate the exploration of the parameter space for the optimal model performance, an adaptive greedy sampling algorithm integrated with a physics-informed residual-based error indicator and random-subset evaluation is introduced to search for the optimal training samples on the fly.

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