Implicit SNS-PFEM with dual mortar method for thermo-hydro-mechanical large deformation problems

This talk introduces a novel stable node-based smoothed particle finite element method (SNS-PFEM) integrated with the dual mortar contact method, designed to address fully coupled thermo-hydro-mechanical (THM) structure-soil interaction geotechnical problems, particularly those involving large deformation. The proposed SNS-PFEM framework offers three key advancements. The validity of this method is demonstrated through four benchmark tests, including the thermo-mechanical (TM) coupled sliding beam, the hydro-thermal (HT) coupled moving liquid, the THM coupled thermal consolidation, and the THM coupled half space heating. Additionally, the proposed THM SNS-PFEM framework is applied to investigate the interaction behavior between submarine pipelines and seabed soil during penetration and buckling, with a specific focus on thermal effects.

Sep 11, 2024 — Sep 13, 2024