WP3' Adaptive Composite Modeling

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WP3. Adaptive Composite Modeling

• FP6- STREP project contract N013517NMP3-CT-2005-
  013517
• Lisboa, 22 July 2007
• E. CARRERA - POLITO WPLeader

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SUMMARY

• 1 - WP3 Overview
• 2 - Task 3.1 Modelling composites with
  piezoelectric
• sensors/actuators ( POLITO, IST,LPMM)

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WP3 Overview

• Participants
• POLITO (3) LPMM (4) IST (8), ISMEP (2) ULB
  (9)
• WP Leader POLITO
• Start 1 (4), End 21 (25)
• Interaction WP1,WP4,WP5

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WP3 Overview

• Objectives
• - Analytical and numerical (finite element)
  modelling of sandwich and
• laminated composites with piezoelectric
  layers
• - Analytical and numerical modelling of thermal
  and pyroelectric effects
• in piezoelectric composites
• - Numerical modelling of piezoceramic shunted
  damping.
• - Application and validation of the above
  advanced models and associated
• FE for various problems, such as vibration
  suppression of simple beams
• and plates due to mechanical or/and thermal
  loads by means of
• piezoelectric sensors and actuators

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WP3 Overview

• Description of work
• Task 3.1 Modelling composites with piezoelectric
  sensors/actuators
• ( POLITO, IST, LPMM) ACTIVE !!
  
• Task 3.2 Modelling thermo-piezoelectric
  composites with
• piezoelectric sensors/actuators
  (POLITO, ISMEP) NOT Active
• Task 3.3 Piezoceramic shunted damping concepts
  (ISMEP, ULB) NOT
• Active
• Task 3.4 Models and concepts validation (ALL)
  NOT Active

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Task 3.1 Declared Topics (POLITO, IST, LPMM)

• Comprehensive coupled piezoelectric models for
  beam, plate and shell
• geometries will be developed. The model has
  hierarchic capabilities in the
• sense that accuracy can be increased by
  augmenting computational efforts.
• The following main cases will be available
  classical model based on known
• theories for laminates, such as CLT (Classical
  Laminated Theories) and FSDT
• (First order Shear Deformation Theory). The
  advanced theories able to
• describe zig-zag fields for the displacement and
  to fulfil interlaminar
• continuity of transverse shear and normal
  stresses layer-wise models that
• have independent variables in each layer will be
  used for this task.
• Classical methods with only displacement
  variables and advanced methods
• based on Mixed Variational Theorems will be
  discussed

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Task 3.1 ACTIVITIES

• 1. POLITO
• 2. IST
• 3. LPMM

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Task 3.1 POLITO

• SUMMARY OF THE MADE ACTIVITIES
• 1. Description of the made research work
• 2. Collaboration with other WP3 Teams
• 3. Cooperation with OOFELIE (computatioanal
  software by SAMTECH)
• 4 - Interaction with EADS questions

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Task 3.1 POLITO Research Work

• Models have been developed in the framework of
  the two following
• variational tools.
• PVD Principle of Virtual Displacements
• RMVT Reissner Mixed Variational Theorem
• The developments have been made according to the
  Unified Formulation by
• Carrera.

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Task 3.1 POLITO Research Work
Displacement model
Equivalent Single Layer Model Taylor Polinomial
and Murakami Zig-Zag Function Layer-Wise Model
Legendre Expansion
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Task 3.1 POLITO Research Work
Electrical Potential
Restrcted to Layer-Wise Model with Legendre
Expansion
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Task 3.1 POLITO Research Work
Transverse Normal Stresses for RMVT
Restricted to Layer-Wise Model with Legendre
Expansion
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Task 3.1 POLITO Research Work
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Task 3.1 POLITO Research Work

• Details can be read in the papers
• The two presented in SMART05 at Lisboa
• A paper that will be presented at AIDAA
  conference (Volterra, Sept 2005)
• A paper that will be presented at AIMETA
  conference (Florence, Sept 2005)

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Task 3.1 POLITO Contribution

• SUMMARY OF THE CONDUCTED ACTIVITIES
• 1. Descrition of the made research work
• 2. Collaboration with other WP3 Teams
• 3. Cooperation with OOFELIE (computatioanal
  software by SAMTECH)

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Task 3.1 POLITO Contribution

• Collaboration with other WP3 Teams
• 1. A master student (Salma Ghorbel) from
  SUPMECA has spent 6 weeks (June-July) in Torino
  working on Unidied Formulation and Mixed Methods
  for thermo-piezo-mechanical problems.
• 2. Other cooperations are welcome.

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Task 3.1 POLITO - OOFELIE

• The new platform oofelie, which means Object
  Oriented Finite Element Led by Interactive
  Executor is the resulting software of research
  conjointly led since 1991 at LTAS (Laboratoire de
  Techniques Aéronautiques et Spatiales, Belgium)
  and at INTEC (Instituto de Desarrollo Tecnologico
  para la Industria Quimica, Argentina).
• It is now developed and maintained by Open
  Engineering (a subsidiary of the Samtech group).

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Oofelie

• The main ideas are
• To build a new architecture to answer strong
  coupling needs to challenge problems of the
  future
• To reduce costs in building a unified
  multidisciplinary toolkit
• To reduce the gap between algorithm design and
  its industrial implementation
• To take benefits of object oriented methodology

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MAIN FEATURES of OOFELIE

• it is written in C
• it has an interpreter it allows e.g. to
  develop
• "à la Matlab" (command files)
• it is modular as a consequence of C, it has
  several reusable components (e.g. math utils,
  etc)
• it is portable runs on different architecture
• it has a quite evolved memory management system
• it can be interfaced with the commercial
  graphical interface of the Samtech group Samcef
  Field
• It is a good basis for code developing and it is
  very extensible
• It is distributed under a community licence and
  the source code is downloadable via CVS

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Modules of OOFELIE
OOFELIE solve coupled problems in different
fields with several modules OOFELIEVibroAcous
ticsOOFELIEPiezoElectric OOFELIEOptoThermoMec
hanics                                            
                                                
                                   OOFELIENLTher
moMechanics, Phase Change WeldingOOFELIENLEle
ctroStaticOOFELIEElectroMagnetoDynamicsOOFELIE
MEMS-NLOOFELIEFSI (Fluid Structure
Interaction)
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WORK DONE AT OPEN ENGINEERING WITH OOFELIE
The unified formulation has been introduced
inside oofelie adding a new class of element for
plates with 4 nodes based on the Principle of
virtual displacement (EDx LDx). Since shape
functions as well as assembling procedures and
system solving routines are already implemented
inside OOFELIE, the basic interface to
communicate the new element with the classes that
manage the element is restricted to the
evaluation of the stiffeness matrix. Tests of
the implemented element have been performed for
mechanical and thermal loaded plates
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Example
Multilayer cantilever plate under mechanical load
The results given by Oofelie are match
perfectly the ones given by the C0zFem code
A
2 layers 0/90 Orthotropic material
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WORK TO DO

• Future works will focus on
• The implementation of the element based on the
  Reissners mixed
• variational theorem (LMx EMx)
• The development of the graphical interface of the
  C0z elements
• with SAMCEF Field
• Extension to coupled problems Piezomechanical
  and thermopiezo

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Task 3.1 POLITO Contribution EADS Questioning

• The following experiments could be of POLITO
  interest
• The considered multilayered (any configuration
  with piezo-electric layers
• and pathces) structures can be beams or flat or
  curved panels with any
• geometrical boundary conditions (simply-supported
  is the favorite one).
• 1. Vibration testing
• Closed cicuit - Open Circuit.
• Calculation of the first 1-5
  frequencies.

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Task 3.1 POLITO Contribution EADS Questioning

• 2. Static Electromechanical testing
  Actuators/Sensors
• 2.1 Case of applied potential
• 2.2 Case of applied pressure
• 2.3 Case of applied charge
• Measurements of displacements, some
  stresses, Electrical variables (potentential,
  charge, displacements)

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Task 3.1 POLITO Contribution EADS Questioning

• 3. Thermo-Electromechanical testing
  Actuators/Sensors
• 2.1 Case of applied potential
• 2.2 Case od applied pressure
• 2.3 Case of applied charge
• 2.4 Case of Uniform heating (temperature is
  the same in the top and bootm surfaces)
• 2.5 Case of non-uniform heating (temperature
  is different in the top and bottom surfaces).

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Task 3.1 POLITO Contribution EADS Questioning

• 3. Control, closed loop experiments
• 3.1 piezo-mechanical
• 3.2 thermo-electro-mechanical

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Task 3.1 POLITO Contribution EADS Questioning

• 3. Control, closed loop experiments
• 3.1 piezo-mechanical
• 3.2 thermo-electro-mechanical