Rediscovering the Mullins effect with deep symbolic regression

Abdusalamov, Rasul; Weise, Jendrik; Itskov, Mikhail

Abstract

The Mullins effect represents a softening phenomenon observed in rubber-like materials and soft biological tissues. It is usually accompanied by many other inelastic effects like for example residual strain and induced anisotropy. In spite of the long term research and many material models proposed in literature, accurate modeling and prediction of this complex phenomenon still remain a challenging task.
In this work, we present a novel approach using deep symbolic regression (DSR) to generate material models describing the Mullins effect in the context of nearly incompressible hyperelastic materials. The two step framework first identifies a strain energy function describing the primary loading. Subsequently, a damage function characterizing the softening behavior under cyclic loading is identified. The efficiency of the proposed approach is demonstrated through benchmark tests using the generalized the Mooney–Rivlin and the Ogden–Roxburgh model. The generalizability and robustness of the presented framework are thoroughly studied. In addition, the proposed methodology is extensively validated on a temperature-dependent data set, which demonstrates its versatile and reliable performance.

Citation

Abdusalamov, R., Weise, J., & Itskov, M. (2024). Rediscovering the Mullins effect with deep symbolic regression. International Journal of Plasticity, 179, Article 104037. https://doi.org/10.1016/j.ijplas.2024.104037

• Journal Article Type: Article
• Acceptance Date: Jun 12, 2024
• Online Publication Date: Jun 20, 2024
• Publication Date: 2024-08
• Deposit Date: Jul 1, 2024
• Journal: International Journal of Plasticity
• Print ISSN: 0749-6419
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 179
• Article Number: 104037
• DOI: https://doi.org/10.1016/j.ijplas.2024.104037
• Keywords: Mullins effect. Deep symbolic regression, Hyperelasticity, Rubber-like materials,Damage
• Public URL: https://keele-repository.worktribe.com/output/858905
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0749641924001645?via%3Dihub