Computer vision with error estimation for reduced order modeling of macroscopic mechanical tests

Franck N'Guyen , Selim M. Barhli , Daniel Pino Muñoz (1) , David Ryckelynck (2)

1 CEMEF - Centre de Mise en Forme des Matériaux
2 CDM - Centre des Matériaux

In this paper, computer vision enables recommending a reduced order model for fast stress prediction according to various possible loading environments. This approach is applied on a macroscopic part by using a digital image of a mechanical test. We propose a hybrid approach that simultaneously exploits a data-driven model and a physics-based model, in mechanics of materials. During a machine learning stage, a classification of possible reduced order models is obtained through a clustering of loading environments by using simulation data. The recognition of the suitable reduced order model is performed via a convolutional neural network (CNN) applied to a digital image of the mechanical test. The CNN recommend a convenient mechanical model available in a dictionary of reduced order models. The output of the convolutional neural network being a model, an error estimator, is proposed to assess the accuracy of this output. This article details simple algorithmic choices that allowed a realistic mechanical modeling via computer vision.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Franck N'Guyen, Selim M. Barhli, Daniel Pino Muñoz, David Ryckelynck. Computer vision with error estimation for reduced order modeling of macroscopic mechanical tests. Complexity, 2018, 2018, 10 p. ⟨10.1155/2018/3791543⟩. ⟨hal-01955929⟩