The 9th International Conference on Multiscale Materials Modeling

講演情報

Symposium

E. Deformation and Fracture Mechanism of Materials

[SY-E11] Symposium E-11

2018年11月1日(木) 14:00 〜 15:30 Room2

Chairs: Xiaoyu Yang(Computer network information center, CAS, China), Denise Reimann(ICAMS, Ruhr-Universität Bochum, Germany)

[SY-E11] A deep learning-based constitutive model for finite element analysis

Fariborz Ghavamian1, Angelo Simone2,1 (1.Delft University of Technology, Netherlands, 2.University of Padova, Italy)

A deep learning model is simply a function that maps a given input to a desired output. In spite of the simple nature of a deep learning model, over the past decade it has revolutionized natural language processing (NLP) and image understanding (IU). One can name three fundamental reasons to explain this astonishing accomplishment: 1) availability of large amount of data for NLP and IU over the past decade; 2) the fact that the performance of a deep learning model keeps increasing by increasing the training data (unlike other machine learning models); and 3) the recently available hardware and software infrastructures which are tailored for deep learning.

In this contribution we leverage the power of deep learning to construct a deep learning-based constitutive model. More specifically, we develop a novel neural network architecture which is tailored for simulations of history-dependent material behavior, and we discuss its implementation in a finite element model.

A possible application of this deep learning-based constitutive model is to serve as an efficient surrogate to a representative volume element (RVE) in a multi-scale finite element analysis. In this application large amount of training data can readily be generated from the RVE. As a proof of concept, we train our deep learning model on a set of data collected from a viscoplastic constitutive model and employ it a finite element model. Through numerical experiments we show that the structural level response of the finite element model is adequately approximated when using the deep learning-based constitutive model in place of the viscoplastic one.