Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element Analysis
Large-deformation finite element (LDFE) analysis with the coupled Eulerian–Lagrangian (CEL) technique for large-deformation soil functions without twisting or distorting the mesh. However, the model does not consider the strain-softening and strain-rate dependence of clay-based soils. The undrained...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/11/1734 |
| _version_ | 1827644378156367872 |
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| author | Mun-Beom Shin Dong-Su Park Young-Kyo Seo |
| author_facet | Mun-Beom Shin Dong-Su Park Young-Kyo Seo |
| author_sort | Mun-Beom Shin |
| collection | DOAJ |
| description | Large-deformation finite element (LDFE) analysis with the coupled Eulerian–Lagrangian (CEL) technique for large-deformation soil functions without twisting or distorting the mesh. However, the model does not consider the strain-softening and strain-rate dependence of clay-based soils. The undrained shear strength of clay is sensitive to the strain rate. In addition, the strain-softening effect of soil strength reduction accompanied by large-scale shear deformation should be considered. In this study, anchor dragging simulations were performed for large-deformation analysis considering strain-softening and strain-rate dependence. Furthermore, a shear strength equation expressing the strain-softening and strain-rate dependence of the Tresca constitutive model was developed based on VUMAT, an ABAQUS/Explicit subroutine. The equation was designed so that it could be linked to the LDFE/CEL model. The model was verified by performing comparative analysis with the Mohr–Coulomb (M–C) perfect-plasticity model. The newly constructed Tresca base strain-softening and strain-rate-dependence VUMAT algorithm in the LDFE/CEL model analysis confirmed the effects of strain-softening and strain-rate dependence. The proposed model enabled a highly realistic simulation of the actual phenomenon than the M–C model. Finally, a parametric study on strain-softening and strain-rate dependence was conducted, and the behavior of clay due to the anchor drag phenomenon was revealed. |
| first_indexed | 2024-03-09T18:14:00Z |
| format | Article |
| id | doaj.art-9e52874a3e6645e99470026a2bb80de2 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T18:14:00Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-9e52874a3e6645e99470026a2bb80de22023-11-24T08:52:01ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-11-011011173410.3390/jmse10111734Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element AnalysisMun-Beom Shin0Dong-Su Park1Young-Kyo Seo2Department of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University, Busan 49112, KoreaDepartment of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University, Busan 49112, KoreaDepartment of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University, Busan 49112, KoreaLarge-deformation finite element (LDFE) analysis with the coupled Eulerian–Lagrangian (CEL) technique for large-deformation soil functions without twisting or distorting the mesh. However, the model does not consider the strain-softening and strain-rate dependence of clay-based soils. The undrained shear strength of clay is sensitive to the strain rate. In addition, the strain-softening effect of soil strength reduction accompanied by large-scale shear deformation should be considered. In this study, anchor dragging simulations were performed for large-deformation analysis considering strain-softening and strain-rate dependence. Furthermore, a shear strength equation expressing the strain-softening and strain-rate dependence of the Tresca constitutive model was developed based on VUMAT, an ABAQUS/Explicit subroutine. The equation was designed so that it could be linked to the LDFE/CEL model. The model was verified by performing comparative analysis with the Mohr–Coulomb (M–C) perfect-plasticity model. The newly constructed Tresca base strain-softening and strain-rate-dependence VUMAT algorithm in the LDFE/CEL model analysis confirmed the effects of strain-softening and strain-rate dependence. The proposed model enabled a highly realistic simulation of the actual phenomenon than the M–C model. Finally, a parametric study on strain-softening and strain-rate dependence was conducted, and the behavior of clay due to the anchor drag phenomenon was revealed.https://www.mdpi.com/2077-1312/10/11/1734strain softeningstrain-rate dependencelarge deformation finite elementcoupled Eulerian–Lagrangian methodsoil constitutive modeldragging anchor |
| spellingShingle | Mun-Beom Shin Dong-Su Park Young-Kyo Seo Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element Analysis Journal of Marine Science and Engineering strain softening strain-rate dependence large deformation finite element coupled Eulerian–Lagrangian method soil constitutive model dragging anchor |
| title | Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element Analysis |
| title_full | Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element Analysis |
| title_fullStr | Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element Analysis |
| title_full_unstemmed | Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element Analysis |
| title_short | Effects of Strain-Softening and Strain-Rate Dependence on the Anchor Dragging Simulation of Clay through Large Deformation Finite Element Analysis |
| title_sort | effects of strain softening and strain rate dependence on the anchor dragging simulation of clay through large deformation finite element analysis |
| topic | strain softening strain-rate dependence large deformation finite element coupled Eulerian–Lagrangian method soil constitutive model dragging anchor |
| url | https://www.mdpi.com/2077-1312/10/11/1734 |
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