Dear all
I have been simulating lung deflation successfully with an hyperelastic material (ogden) with the commercial software
Altair Radioss (see first attached image for illustration)
there 4 components:
- one shell mesh that represents a rigid cavity in which the lung deforms
- a tetra 4 nodes mesh for the lung
- 2 tetra 4 nodes mesh for the airway exterior and interior
the boundary conditions are the following:
- set of fixed nodes with no displacements
- set of nodes with gravity applied (lung, airway)
the loads are:
- pressure on the half top part of the lung with patient on back (use a defined subpart of the lung exterior surface)
see 2nd attached image for illustration
a sliding contact between the cavity and the lung
third attached image is the visualization of my rewriting of this finite element model in the febio format (work in progress)
i tried to upload the febio file but it is too big
What is your preference to send a link to big files in this forum?
i have several questions:
- i put all the component meshes in the same object, the lung and airways have points in common. Will the contact be handled by defaults in this case?
- when i describe several parts in an object, how do you recommend to increment the element id? shall there be a global element number in the multi part object? or shall i restart the increment at 1 for each part?
- for my pressure load definition shall i define a surface section in the geometry section or a surface data in mesh data
- for the sliding contact do you recommend sliding facet-on-facet or node facet ?
thank you
regards
Anne-Cecile Lesage
I have been simulating lung deflation successfully with an hyperelastic material (ogden) with the commercial software
Altair Radioss (see first attached image for illustration)
there 4 components:
- one shell mesh that represents a rigid cavity in which the lung deforms
- a tetra 4 nodes mesh for the lung
- 2 tetra 4 nodes mesh for the airway exterior and interior
the boundary conditions are the following:
- set of fixed nodes with no displacements
- set of nodes with gravity applied (lung, airway)
the loads are:
- pressure on the half top part of the lung with patient on back (use a defined subpart of the lung exterior surface)
see 2nd attached image for illustration
a sliding contact between the cavity and the lung
third attached image is the visualization of my rewriting of this finite element model in the febio format (work in progress)
i tried to upload the febio file but it is too big
What is your preference to send a link to big files in this forum?
i have several questions:
- i put all the component meshes in the same object, the lung and airways have points in common. Will the contact be handled by defaults in this case?
- when i describe several parts in an object, how do you recommend to increment the element id? shall there be a global element number in the multi part object? or shall i restart the increment at 1 for each part?
- for my pressure load definition shall i define a surface section in the geometry section or a surface data in mesh data
- for the sliding contact do you recommend sliding facet-on-facet or node facet ?
thank you
regards
Anne-Cecile Lesage
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