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DPI2010-21590-C02-02

Financiado

INTEGRIDAD DE MATERIALES MULTICAMPO Y FUNCIONALMENTE VARIABLES (FGM): SIMULACION...

INTEGRIDAD DE MATERIALES MULTICAMPO Y FUNCIONALMENTE VARIABLES (FGM): SIMULACION NUMERICA Y EXPERIMENTAL INTEGRITY OF MULTIFIELD MATERIALS: NUMERICAL SIMULATION (SUBPROJECT OF THE GROUP AT THE UNIVERSITY OF SEVILLA)THE INCREASING DEMAND FOR DESIGN OF HIGH PERFORMANCE CONTROL ENGINEERING DEVICES TOGETHER WITH RECENT ADVANCES IN MATERI... ver más

01/01/2010

67K€

Presupuesto del proyecto: 67K€

Líder del proyecto

UNIVERSIDAD DE SEVILLA No se ha especificado una descripción o un objeto social para esta compañía.

Total investigadores 3670

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Financiación concedida El organismo AGENCIA ESTATAL DE INVESTIGACIÓN notifico la concesión del proyecto el día 2010-01-01

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Líder del proyecto

UNIVERSIDAD DE SEVILLA

Total investigadores 3670

Presupuesto del proyecto 67K€

Descripción del proyecto INTEGRITY OF MULTIFIELD MATERIALS: NUMERICAL SIMULATION (SUBPROJECT OF THE GROUP AT THE UNIVERSITY OF SEVILLA)THE INCREASING DEMAND FOR DESIGN OF HIGH PERFORMANCE CONTROL ENGINEERING DEVICES TOGETHER WITH RECENT ADVANCES IN MATERIAL SCIENCE HAVE GIVEN RISE TO THE SO-CALLED SMART OR ADAPTIVE SYSTEMS, INTELLIGENT STRUCTURES WHOSE DYNAMICS MAY BE MONITORED AND MODIFIED BY DISTRIBUTED OR CONTINUOUS SENSORS AND ACTUATORS ARE FINDING WIDER APPLICATIONS IN MANY INDUSTRIAL FIELDS LIKE AEROSPACE, AERONAUTIC, AUTOMOTIVE, BIOMEDICAL, AND MICRO- (MEMS) AND NANO-SYSTEMS (NEMS) DESIGN, SUCH APPLICATIONS RELY ON THE USE OF SMART MATERIALS SHOWING MULTIFIELD COUPLING PROPERTIES, THIS PROJECT FOCUSES ON PIEZOELECTRIC (PE) AND MAGNETOELECTROELASTIC (MEE) MULTIPHASE COMPOSITE MATERIALS THAT EXHIBIT AN INHERENT COUPLING AMONG THE MECHANICAL, ELECTRIC AND MAGNETIC FIELDS, UNDERSTANDING AND PROPERLY MODELING THE FAILURE MECHANISMS OF THESE MATERIALS IS CRUCIAL TO THE ADVANCEMENT OF THE MODERN INTELLIGENT SYSTEMS, FRACTURE MECHANICS PLAYS THEREFORE A KEY ROLE, SINCE DEFECTS SUCH AS CRACKS WILL INEVITABLY APPEAR IN THE MATERIAL EITHER DURING MANUFACTURING OR IN SERVICE, LEADING NOT ONLY TO A DECREASE IN THE STRUCTURAL COMPONENT STRENGTH AND SERVICE LIFE BUT ALSO MODIFYING THE TRANSFER BETWEEN MECHANICAL AND NON-MECHANICAL ENERGIES (ELECTRICAL, MAGNETIC),MORE SPECIFICALLY, THE OBJECTIVES OF THE PROJECT FOCUS ON THE FORMULATION, IMPLEMENTATION AND VALIDATION OF NUMERICAL TOOLS FOR THE ANALYSIS AND SIMULATION OF:1, FRACTURE PROBLEMS IN 2-D MEE BODIES UNDER THERMAL LOADING WHEN SUBJECTED TO COMBINED MAGNETIC, ELECTRIC AND MECHANIC LOADS (BOTH STATIC AND DYNAMIC REGIMES WILL BE ADDRESSED),2, WAVE PROPAGATION PROBLEMS IN CRACKED 3D MEE BODIES,3, FRACTURE PROBLEMS IN CRACKED PE AND MEE PLATES UNDER BENDING,4, DAMAGE DETECTION PROBLEMS IN MEE SOLIDS BY ARTIFICIAL NEURAL NETWORKS (ANN)FOR THE TYPE OF APPLICATIONS CONSIDERED HEREIN, THE BOUNDARY ELEMENT METHOD (BEM) HAS BEEN SHOWN AS A POWERFUL AND EFFECTIVE TOOL WHEN COMPARED TO OTHER COMPUTATIONAL TECHNIQUES, AMONG ITS ADVANTAGES ONE MAY CITE THAT 1) ONLY DISCRETIZATION OF THE BOUNDARY IS REQUIRED (THUS SIMPLIFYING PRE-PROCESSING AND REMESHING); 2) IT SHOWS IMPROVED ACCURACY IN STRESS CONCENTRATION PROBLEMS (LIKE FRACTURE PROBLEMS), SINCE THERE ARE NO APPROXIMATIONS IMPOSED ON THE STRESS SOLUTION IN INTERIOR DOMAIN POINTS,; OR 3) MODELING OF PROBLEMS INVOLVING INFINITE AND SEMI-INFINITE DOMAINS (LIKE IN WAVE PROPAGATION PHENOMENA) IS SIMPLE AND ACCURATE, SINCE THE RADIATION CONDITIONS AT INFINITY ARE AUTOMATICALLY SATISFIED, A BASIC FEATURE OF BEM IS THE USE OF FUNDAMENTAL SOLUTIONS, WHICH ARE ANALYTICALLY FREE SPACE SOLUTIONS OF THE GOVERNING DIFFERENTIAL EQUATION UNDER THE ACTION OF A POINT SOURCE, THE FACT THAT THEY ARE EXACT SOLUTIONS ACCOUNTS FOR SOME OF THE ADVANTAGES OF THE BEM, BUT IT ACCOUNTS AS WELL FOR SOME OF THE METHOD LIMITATIONS THAT THIS PROJECT WILL TACKLE: THE KNOWLEDGE OF A SUITABLE FUNDAMENTAL SOLUTION AND THE NUMERICAL TREATMENT OF INTEGRATIONS ASSOCIATED TO THIS SOLUTION, REGARDING THE LAST AIM, THE ANN WILL BE TRAINED WITH BEM DATA,THE PROJECT IS CONTINUATION OF PREVIOUS PROJECTS WITHIN THE RESEARCH LINES AT THE GROUP OF STRUCTURES OF THE UNIVERSITY OF SEVILLE AND THE GROUP OF MECHANICS OF SOLIDS AND STRUCTURES OF THE UNIVERSITY OF GRANADA IN THE LAST YEARS UNDER COORDINATED PROJECTS DPI2000-1217, DPI2004-08147 AND DPI2007-66792, ESTRUCTURAS INTELIGENTES\MATERIALES MULTICAMPO (PIEZOELECTRICOS\MAGNETOELECTROELASTICOS)\MECANICA DE LA FRACTURA\CARGAS TERMICAS\PROPAGACION DE ONDAS\METODO DE LOS ELEMENTOS DE CONTORNO\REDES NEURONALES.

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