FINITE STRAIN ANALYSIS OF LIMESTONE/BASALTIC MAGMA INTERACTION AND FRACTURE: LOW ORDER MIXED TETRAHEDRON AND REMESHING
In this investigation, we use a recent constitutive framework and remising technique for tetrahedra to analyse the pressure-driven crack propagation of limestone intruded by basaltic magma. Limestone is represented by an least-plastic capped Drucker-Prager model with an hypo elastic term in order to...
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| Outros Autores: | , , , |
| Formato: | article |
| Idioma: | por |
| Publicado em: |
2019
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| Assuntos: | |
| Texto completo: | http://hdl.handle.net/10174/24490 |
| País: | Portugal |
| Oai: | oai:dspace.uevora.pt:10174/24490 |
| Resumo: | In this investigation, we use a recent constitutive framework and remising technique for tetrahedra to analyse the pressure-driven crack propagation of limestone intruded by basaltic magma. Limestone is represented by an least-plastic capped Drucker-Prager model with an hypo elastic term in order to account for inelastic effects from plastic signature. Kinematic hardening is considered for limestone, whereas magma is modelled by means of a compressible Bingham fluid. Classical limit surfaces of the capped model are used to initiate the crack events in the limestone. Propagation is performed by a local remising technique with mesh smoothing for untracked elements. Arnold's MINI element is used to avoid locking in the quasi-incompressible case. Verification (for limestone) examples and a crack propagation example in 3D are performed. A mesh convergence study is performed, exhibiting very promising results. |
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