Machine learning enabled identification of sheet metal localization

Data and Machine Learning codes for:

Machine learning enabled identification of sheet metal localization

Journal: International Journal of Solids and Structures

Abstract: The Forming Limit Curve (FLC), which describes the maximum applicable strain before localization, depends on the particular material, but also on the applied load and history of the load. Recent investigations have shown that the non-
proportional loading effect on the FLC can be predicted with data-driven or machine-learning-based methods. Here
we compare different ML methods to their applicability in predicting localization point under multi-segmented non-
proportional loading. Therefore, a FE-based metamodel is developed that allows imposing an arbitrary loading history
on a sheet metal to predict the point of localization. A series of virtual experiments are conducted with this metamodel
to generate a database of bi-linear loading paths that are used for training. Different ML-based methods were used
to predict the localization point based on the strain history data. The 1D-Convolutional Neural Network (1D-CNN),
with an ability to learn dependency between input features, has the best accuracy in predicting the localization point.