CheFEM
  • CheFEM stands for chemical interaction driven FEM/FDM simulation of polymer
       based nano, micro and macro materials.

  • CheFEM quantifies effects of chemical exposure (liquid, gas and supercritical)
       and UV exposure on long term mechanical retention and permeation performance.

  • CheFEM predictions show high degree of correlation to - properly carried out
       accelerated and long term - laboratory tests for chemical-physical ageing.

  • CheFEM can be used in combination with existing CAD/FEM multiphysics software,
       like Abaqus and Ansys.

    • intro2
    Emission, time lag and stationary concentration distribution in a 3 layer laminate.
    intro1
    Chemical driven ageing of a composite tank.
    CheFEM has a modular architecture. The modules are ordered according to the
    solution sequence. Moreover, the system has a logical interface with other
    CAD/FEM software.

    Also see scheme below.

    101  Lattice Based Thermodynamics & Diffusion
    102  Surface & Chemical Activity Driven Corrosion
    103  Gibbs Free Restraint

    Click the respective tabs to learn more on each module.

    Schematic overview of CheFEM modules and chemical-physical interactions.
    101  Lattice Based Thermodynamics & Diffusion Module

    The Lattice Based Thermodynamics & Diffusion Module deals with (multicomponent)
    chemical potential and solubility in different material layers as function of temperature,
    system pressure and stress on the element under consideration. The module also
    seamlessly calculates (multicomponent) diffusion rates. On this basis, permeation
    rate, time lag, degree of plasticizing and material expansion are determined. Effects of
    (anomalous) ageing are included.

    Advanced liquid-gas-supercritical solubility thermodynamics.

    Stationary concentration distribution (one sided exposure) as function of distance and temperature in a seal.
    102  Surface & Chemical Activity Driven Corrosion Module

    The Surface & Chemical Activity Corrosion Module quantifies surface corrosion
    phenomena and chemical activity (fugacity) driven degradation of internal interfaces,
    like fillers and reinforcements. Since the long term strength of combined materials is
    largely dependent on interfacial robustness, this module is vital in many
    circumstances. Effects of UV and Cathodic Protection are included.

    Chemical degradation of a secondary coated structural material.
    103  Gibbs Free Restraint Module

    The Gibbs Free Restraint Module is based on a thermodynamical-mechanical fracture
    analysis of material components and interfaces between individual components.
    The module predicts whether surfaces will restrain effects of a local stress potential
    and local chemical degradation. If restraint as function of place and time is
    insufficient, the module predicts the extent of fracture/ageing.    		  
    103-2
    Using Gibbs Free - Mechanical Fracture to predict material failure in extreme circumstances.
    We invite you to contact us for more information and for the CheFEM brochure.


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    Screenshot of fully web enabled CheFEM    		  
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