Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approach
If the compressive strain–stress curve of cork has already been largely described, its relationship with the cork structure still requires a better understanding. In this study, quasi-static and Progressive Repeated Loading (PRL) tests in compression have been performed on natural cork with a tensil...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523007918 |
| _version_ | 1827687106014609408 |
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| author | Massimiliano Gerometta Xavier Gabrion Aurélie Lagorce Sébastien Thibaud Thomas Karbowiak |
| author_facet | Massimiliano Gerometta Xavier Gabrion Aurélie Lagorce Sébastien Thibaud Thomas Karbowiak |
| author_sort | Massimiliano Gerometta |
| collection | DOAJ |
| description | If the compressive strain–stress curve of cork has already been largely described, its relationship with the cork structure still requires a better understanding. In this study, quasi-static and Progressive Repeated Loading (PRL) tests in compression have been performed on natural cork with a tensile machine. The elastic modulus was measured by a quasi-static compression test on cube or parallelepiped specimens considering different strain measurements methods: crosshead displacement, extensometer, and full field measurements method (Digital Image Correlation or DIC method). Regardless of the considered strain measurement method, the elastic modulus of cork remains in the same order of magnitude. The PRL test carried out at different nominal strains (3 %, 20 %, 46 %, 66 %, 80 %) highlighted the time dependant behaviour of cork (viscous properties). Moreover, a stiffening of the material was observed when increasing the strain at each loading/unloading cycle. Finally, the full field measurement following compression revealed the heterogeneity of the strain distribution on the cork external surface, resulting in localised regions of deformation. From the perspective of compression behaviour, these results lead to a new interpretation of cork which can be considered as a composite material. |
| first_indexed | 2024-03-10T09:27:57Z |
| format | Article |
| id | doaj.art-cd641605b0354d74ac55c5c47a2eeecd |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-10T09:27:57Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-cd641605b0354d74ac55c5c47a2eeecd2023-11-22T04:46:15ZengElsevierMaterials & Design0264-12752023-11-01235112376Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approachMassimiliano Gerometta0Xavier Gabrion1Aurélie Lagorce2Sébastien Thibaud3Thomas Karbowiak4Univ. Bourgogne Franche-Comté, Institut Agro, PAM UMR A 02.102, 1 Esplanade Erasme, 21000 Dijon, France; SUPMICROTECH, CNRS, Institut FEMTO-ST, F-25000 Besançon, FranceSUPMICROTECH, CNRS, Institut FEMTO-ST, F-25000 Besançon, FranceUniv. Bourgogne Franche-Comté, Institut Agro, PAM UMR A 02.102, 1 Esplanade Erasme, 21000 Dijon, FranceSUPMICROTECH, CNRS, Institut FEMTO-ST, F-25000 Besançon, FranceUniv. Bourgogne Franche-Comté, Institut Agro, PAM UMR A 02.102, 1 Esplanade Erasme, 21000 Dijon, France; Corresponding author.If the compressive strain–stress curve of cork has already been largely described, its relationship with the cork structure still requires a better understanding. In this study, quasi-static and Progressive Repeated Loading (PRL) tests in compression have been performed on natural cork with a tensile machine. The elastic modulus was measured by a quasi-static compression test on cube or parallelepiped specimens considering different strain measurements methods: crosshead displacement, extensometer, and full field measurements method (Digital Image Correlation or DIC method). Regardless of the considered strain measurement method, the elastic modulus of cork remains in the same order of magnitude. The PRL test carried out at different nominal strains (3 %, 20 %, 46 %, 66 %, 80 %) highlighted the time dependant behaviour of cork (viscous properties). Moreover, a stiffening of the material was observed when increasing the strain at each loading/unloading cycle. Finally, the full field measurement following compression revealed the heterogeneity of the strain distribution on the cork external surface, resulting in localised regions of deformation. From the perspective of compression behaviour, these results lead to a new interpretation of cork which can be considered as a composite material.http://www.sciencedirect.com/science/article/pii/S0264127523007918Cork structureQuasi-static compression testProgressive repeated loading testExtensometerFull field measurementComposite material |
| spellingShingle | Massimiliano Gerometta Xavier Gabrion Aurélie Lagorce Sébastien Thibaud Thomas Karbowiak Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approach Materials & Design Cork structure Quasi-static compression test Progressive repeated loading test Extensometer Full field measurement Composite material |
| title | Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approach |
| title_full | Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approach |
| title_fullStr | Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approach |
| title_full_unstemmed | Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approach |
| title_short | Towards better understanding of the strain–stress curve of cork: A structure–mechanical properties approach |
| title_sort | towards better understanding of the strain stress curve of cork a structure mechanical properties approach |
| topic | Cork structure Quasi-static compression test Progressive repeated loading test Extensometer Full field measurement Composite material |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523007918 |
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