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CARES SOFTWARE - Features
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CARES ADVANCED FEATURES

  • CARES/ANSYS/PDS - Probabilistic Component Life Prediction - Allows the effects of component stochastic variables to be considered in life prediction.

  • CARES/WeibPar - For non-standard specimen geometries where closed form solutions do not exist, WeibPar utilizes CARES to calculate the effective volume/area from a finite element model of the specimen. Combined with the failure data parameter estimation, the effective volume/area is subsequently used by WeibPar in calculation of the Weibull material scale parameter.

  • CARES/WeibPar - WeibPar additionally utilizes CARES in the calculation of confidence bounds on the component reliability via Monte Carlo bootstrap techniques.

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CARES STANDARD FEATURES

  • Brittle Material Reliability Analysis
    • Time Independent (Fast Fracture)
    • Time Dependent (Slow Crack Growth)
      • Creep (Static Fatigue)
      • Monotonically Increasing (Dynamic Fatigue)
    • Transient - Time Dependent Reliability (probability of survival) of components subjected to transient (multiple load step) thermomechanical loading

  • Finite Element Analysis - Interaction with the FEA Results files includes extraction of Geometry, Temperature and Stress results for the following:
    • Volume elements
    • Surface elements
    • Axisymmetric elements
    • Multiple load steps
    • Psuedo-surface - the free face of Volume elements may be identified and treated as a surface in CARES
    • Stress Space - reliability calculations are performed on either the Principle Stresses or the Full Stress Tensor
    • Symmetrical FE Models

  • Material Parameter Settings
    • Direct Input of Time Independent and Time Dependent parameters (for a uniform temperature)
    • CARES Material Parameter File (CMP) exported from WeibPar or manually created
    • CMP Override - this advanced feature is utilized when WeibPar or ANSYS/PDS provide the time independent parameters

  • Material Reliability Settings
    • Volume
      • PIA - Principle of Indepent Action
      • Weibull Normal
      • Maximum Tensile Stress - Griffith or Penny shaped cracks
      • Batdorf Coplanar - Griffith or Penny shaped cracks
      • Batdorf Shetty - Griffith or Penny shaped cracks
    • Surface (Area)
      • Principle of Indepent Action (PIA)
      • Weibull Normal
      • Batdorf Coplanar - Griffith or Notch shaped cracks
      • Batdorf Shetty - Griffith, Notch, or Semicircular shaped cracks

  • Loading Options
    • Load Factor - increase or decrease the Stresses by this factor
    • Multiple Load step range selection
    • Override a single load step (Time Dependent) applying a g-factor
    • Load Block Repeat for cycling the applied load

  • Output Options
    • Print Mode - Input only, Output only, or Both
    • Print Depth - Component, Element, Subelement (Gauss Point), Load step
    • Print Depth may also be controlled by a range for any/all the above
    • Post Processing - ANSYS risk of rupture file

  • Help
    • The User Guide and Theory Guide PDF files are available from the Help menu
    • The Error Messages text file is also available from the Help menu
    • Additonal support information links are provided

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FINITE ELEMENT MODEL

    Elements 2,000,000
    Nodes 2,000,000
    Load Steps 1,000

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The download section details specific upgrades from version to version.

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