Chapter 1  Modeling viscoelastic materials

• Modeling viscoelastic materials
• Introduction
• Representing complex modulus
  • Non parametric (tabular) representations
  • Simple rheological models
  • High order rational models
  • Fractional derivative models
  • 3D constitutive laws
• Environmental factors
  • Influence of temperature
  • Other environment factors
• Determining the complex modulus
• Conclusion

Chapter 2  Viscoelastic FEM models

• Viscoelastic FEM models
• Viscous and structural damping
  • Properties of the damped 1 DOF oscillator
  • Real modes and modal damping
  • Selection of modal damping coefficients
    • Modal Strain Energy method
    • Experimental and design damping ratio
• Viscoelastic models
  • Frequency domain representation with variable coefficients
  • State-space representations
  • Second order models with internal states
  • Fractional derivatives
• Spectral decomposition and reduced models
  • Complex modes of analytical models
  • Complex mode eigenvalue problems with constant matrices
  • Model reduction methods
  • Equivalent viscous damping
  • Case of viscoelastic models
• Meshing of sandwich models
  • Mesh convergence and non conformity
• Thermal considerations
  • Thermal model
  • Heat source due to viscoelastic behavior
  • Cantilever plate example
  • Thermo-elastic damping

Chapter 3  Composite FEM modeling

• Composite FEM modeling
• Material models
  • Classical lamination theory
  • 3D anisotropy
• Material orientation maps

Chapter 4  Toolbox tutorial

• Toolbox tutorial
• Download and installation procedures
• Representing viscoelastic materials
  • Introducing your own nomograms
  • Selecting a material for your application
  • Selective components in constitutive law
• Viscoelastic device meshing tools
  • Generation of sandwich models
  • Meshing foam fillings
  • Exporting submeshes to NASTRAN
• Parametric models, structure reference
  • Parametric models, zCoef
  • par
  • zCoef
  • Parametric models, zCoef
  • Input definitions
  • Sensor definitions
  • MVR Format reference
  • Response post-processing options
• Sample setup for parametric studies
  • Performance in modulus/loss plane
  • Illustration of pole range computations
  • Model parameterization
  • Sample parametric study in SDT (full solver, Upcom superelement)
  • Parametric model generated within NASTRAN (fo_by_set DMAP)
  • Parametric model from NASTRAN element matrices
• Fluid/structure coupling
  • Summary of theory
  • Acoustic stiffness on a loudspeaker
• Rayleigh integral computations
  • Summary of theory
  • Diffuse field and transmission loss
• NASTRAN Generation of the parametric model
  • fo_by_set
  • nas_sdtserv
• Advanced connection models
  • Screw models
  • Physical point with rotations

Chapter 5  Toolbox Reference

• Toolbox Reference
• fe2xf
  • frfzr [-file FileName]
  • direct [Full,First [,zCoef0], Iter, Reduced]
  • FrfPoleSearch
  • PoleEh
  • PoleTemp
  • PoleRange ...
  • PlotPoleSearch
  • zCoef
  • DefList
  • Build[,TrEnh,ListR]
• fevisco
  • AddMat,Par2Visc
  • Fluid [merge,matrix,makereduced, ...]
  • Feplot
  • MakeModel [Matid i]
  • [Write,Build] Step12
  • MakeSandwich layers
  • MatSplit
  • Thermo
  • StrainMap
  • Test
  • WriteInclude
  • ceig, direct
  • NASTRAN
• m_visco, mvisco_3m
  • database,default,info,dbval
  • DispMat
  • RefMat
  • nomo
  • at
  • interp [,-unit SI] [,showrange]
  • WriteNastran
  • HandNomo FileName
• nasread
  • Bulk file
  • OUTPUT2 binary
  • BuildUp,BuildOrLoad
  • OUTPUT4 binary
  • .f06 output (obsolete)
• naswrite
  • EditBulk
  • model
  • node,elt
  • dmig
  • job
  • Wop4
  • WriteFreqLoad
  • Write[Curve,Set,SetC,Uset]
  • WritePLIL

• Bibliography
• Index