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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.24747 |
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| _version_ | 1866910019203629056 |
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| author | Abbasi, Arefeh Ricci, Maurizio Carrara, Pietro Flaschel, Moritz Kumar, Siddhant Marfia, Sonia De Lorenzis, Laura |
| author_facet | Abbasi, Arefeh Ricci, Maurizio Carrara, Pietro Flaschel, Moritz Kumar, Siddhant Marfia, Sonia De Lorenzis, Laura |
| contents | We assess the performance of EUCLID, Efficient Unsupervised Constitutive Law Identification and Discovery, a recently proposed framework for automated discovery of constitutive laws, on experimental data. Mechanical tests are performed on natural rubber specimens spanning simple to complex geometries, from which we collect both global, force elongation, and local, full-field displacement, measurements. Using these data, we obtain constitutive laws via two routes, the conventional identification of unknown parameters in a priori selected material models, and EUCLID, which automates model selection and parameter identification within a unified model-discovery pipeline. We compare the two methodologies using global versus local data, analyze predictive accuracy, and examine generalization to unseen geometries. Moreover, we quantify the experimental noise, investigate the coverage of the material state space achieved by each approach and discuss the relative performance of different datasets and different a priori chosen models versus EUCLID. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_24747 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Discovery of Hyperelastic Constitutive Laws from Experimental Data with EUCLID Abbasi, Arefeh Ricci, Maurizio Carrara, Pietro Flaschel, Moritz Kumar, Siddhant Marfia, Sonia De Lorenzis, Laura Computational Physics Materials Science We assess the performance of EUCLID, Efficient Unsupervised Constitutive Law Identification and Discovery, a recently proposed framework for automated discovery of constitutive laws, on experimental data. Mechanical tests are performed on natural rubber specimens spanning simple to complex geometries, from which we collect both global, force elongation, and local, full-field displacement, measurements. Using these data, we obtain constitutive laws via two routes, the conventional identification of unknown parameters in a priori selected material models, and EUCLID, which automates model selection and parameter identification within a unified model-discovery pipeline. We compare the two methodologies using global versus local data, analyze predictive accuracy, and examine generalization to unseen geometries. Moreover, we quantify the experimental noise, investigate the coverage of the material state space achieved by each approach and discuss the relative performance of different datasets and different a priori chosen models versus EUCLID. |
| title | Discovery of Hyperelastic Constitutive Laws from Experimental Data with EUCLID |
| topic | Computational Physics Materials Science |
| url | https://arxiv.org/abs/2510.24747 |