PaperGeo Module

The PaperGeo module

PaperGeo creates digital models of paper starting from statistical properties of a flat paper sheet or a composite layer, with the fibers being mainly oriented in one plane.

Modelling parameters are the known fiber parameters and the fiber orientation distribution in the plane.

The digital model consists of a detailed 3D microstructure of the paper that reveals the micro-morphology and allows the kind of close analysis only possible from a ÁCT-scan.

Additionally, new paper materials can be designed and their material properties can be computed by changing the underlying statistical model. The new design can be compared to existing products and its performance optimized.

3D microstructure generated with PaperGeo with Laydown. The non-overlapping, bending fibers are modelled with the bending stiffness as an effective parameter

PaperGeo features

PaperGeo creates realistic structure models of flat paper sheets and flat composite layers. Complex fiber laydown processes with deformed bending fibers are modelled, allowing to create dense sheets without overlapping fibers.

It is also possible to model gradient media and the addition of binder and filler.

The fibers in the paper structure can be modelled to be straight or curved, with various profile shapes (circular, elliptical, rectangular, cellulose, etc.).

The in-plane orientation of fibers and the distribution of fiber parameters can be specified.

Examples of PaperGeo applications

  • Modelling of papers for filtration.
  • Modelling of layers of unidirectional carbon fibers from composites.
  • Modelling of cellulose fiber paper sheets and cellulose fiber lay-down.

Additional modules needed?

  • The GeoDict Base package is needed for basic functionality.
  • The ExportGeo module can be used to export the modelled paper structure as 3D image (*.raw), as surface triangulation (*.stl) for CAD-programs, or as direct simulation in Fluent or Abaqus.
  • Some material properties that can be computed for the resulting 3D paper models using other GeoDict modules are:
Material properties Modules
Pore size distribution, base weight distribution PoroDict and MatDict
Flow resistivity, permeability and pressure drop FlowDict
Effective elastic properties ElastoDict
Large deformations, plastic effects, damage and failure ElastoDict
Effective Diffusivity and tortuosity DiffuDict
Effective thermal and electrical conductivity ConductoDict
Filter efficiency and filter life time FilterDict®