Accurate thermal-induced structural failure analysis under incompressible conditions
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10.1016/j.engstruct.2022.114213
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/371189
Tipus de documentArticle
Data publicació2022-06
EditorElsevier
Condicions d'accésAccés restringit per política de l'editorial
(embargat fins 2024-04-30)
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Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
ProjecteKYKLOS 4.0 - An Advanced Circular and Agile Manufacturing Ecosystem based on rapid reconfigurable manufacturing process and individualized consumer preferences (EC-H2020-872570)
ANALISIS DE RENDIMIENTO MEJORADO BASADO EN PATRONES DE IMPRESION Y MULTIESCALA DE COMPONENTES DE FABRICACION ADITIVA AVANZADA (AEI-PID2020-115575RB-I00)
ANALISIS DE RENDIMIENTO MEJORADO BASADO EN PATRONES DE IMPRESION Y MULTIESCALA DE COMPONENTES DE FABRICACION ADITIVA AVANZADA (AEI-PID2020-115575RB-I00)
Abstract
In this work, the performance of the mixed 3-field displacement/deviatoric-strain/pressure (u/e/p) finite element is examined for nonlinear thermo-mechanical structural applications under incompressible behavior. The proposed FE model increases the solution accuracy in terms of strains and stresses, guaranteeing mesh-objective results in nonlinear analyses. Structural failure is modelled with J2-plasticity and J2-damage constitutive laws, introducing the isochoric behavior, typical of metals, in the material response. The solution of the coupled thermal and mechanical problems follows a staggered scheme and temperature dependent material properties are introduced to study the effect of the thermal coupling in the mechanical problem. This FE approach is applicable with any interpolation basis: triangles, quadrilaterals, tetrahedras, hexahedras and prisms. A set of numerical benchmark problems is proposed to examine the influence of the enhanced accuracy of the proposed model in thermally-induced structural failure analyses in incompressible conditions. The study includes the comparison of the u/e/p and u/pand FE formulations, where the effect of the thermal coupling in the problem is investigated. The superior performance of the 3-field formulation with regard to the evaluation of collapse mechanisms, failure loads, mechanical dissipation and numerical stability in incompressible situations is shown.
CitacióMoreira, C.A. [et al.]. Accurate thermal-induced structural failure analysis under incompressible conditions. "Engineering structures", Juny 2022, vol. 261, p. 114213:1-114213:21.
ISSN1873-7323
Versió de l'editorhttps://www.sciencedirect.com/science/article/abs/pii/S0141029622003431
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AccurateThermal ... 2_vR_nomarks_PRoofMods.pdf | 6,667Mb | Accés restringit |