Biphasic problems from the FEBio test suite. These files are run through FEBio after each compilation to ensure that it is working as intended.
Owner: FEBio Team
biphasic
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bp04.feb
A biphasic block of 10 elements is compressed in the zdirection by 0.1 units in time t=100, then allowed to relax to time t=1000.
biphasic
bp05.feb
Biphasic unconfined compression of a circular disk. The disk is modeled using a wedge with 30 elements along the radial direction. It has a radius of 3 mm and a thickness of 1 mm. It is compressed in the zdirection by 0.2 mm using a step function, then allowed to relax to time t=1e4 s.
biphasic
bp07.feb
Cylinder with Referentially Isotropic Permeability material undergoes pressure change and twist.
biphasic
bp08.feb
Cylinder with Referentially Trans Iso Permeability material undergoes pressure change and twist
biphasic
bp09.feb
Cylinder with Referentially Orthotropic Permeability material undergoes pressure change and twist
biphasic
bp10.feb
A poroelastic cylindrical section with quarter symmetry is subject to a pressure that varies between 0 at time t=0 to 0.5 at time t=1.
This problem can be compared to ma11, which does not use a poroelastic material.
biphasic
bp11.feb
1D Permeation with prescribed upstream pressure and clamped condition. This problem demonstrates how to prescribe boundary conditions for a permeation problem where the fluid pressure and solid displacement are prescribed upstream.
biphasic
bp12.feb
1D Permeation with prescribed upstream pressure and unclamped condition. This problem demonstrates how to prescribe boundary conditions for a permeation problem where the fluid pressure is prescribed upstream, but the solid displacement on the upstream surface is unconstrained. The latter boundary condition is satisfied by prescribing a zero value for the effective traction on the upstream surface.
biphasic
bp13.feb
1D Permeation with prescribed upstream flux and clamped condition. This problem demonstrates how to prescribe boundary conditions for a permeation problem where the fluid flux and solid displacement are prescribed upstream.
biphasic
bp14.feb
1D Permeation with prescribed upstream flux and unclamped condition. This problem demonstrates how to prescribe boundary conditions for a permeation problem where the mixture flux is prescribed upstream, but the solid displacement on the upstream surface is unconstrained.
biphasic
bp15.feb
1D biphasic contact between two bricks under displacement control (stressrelaxation).
biphasic
bp16.feb
1D biphasic contact between two bricks under load control (creep). This problem demonstrates how to set up a twostep analysis to implement load control.
biphasic
bp17.feb
2D biphasic contact between a semicylindrical block and a rectangular block under displacement control.
biphasic
bp18.feb
A biphasicviscoelastic block of 10 elements is compressed in the zdirection by 0.1 units in time t=100, then allowed to relax to time t=1000.
biphasic
bp19.feb
Two biphasic bodies, one with hexahedral mesh and the other with tetrahedral mesh, tied at interface. The body with hexahedral mesh is much less permeable than the one with the tetrahedral mesh. A normal mixture traction is prescribed on the less permeable body and a transient response ensues.
Continuity of fluid pressure is enforced across the tied contact interface. Due to the significant disparity in permeability between the tied regions, large gradients in fluid pressure are observed across the interface.
biphasic
bp20.feb
A biphasic block of 20 elements is perfused using a solvent supply. The block expands along the zdirection until the fluid pressure is balanced by the solid matrix stress. The perfused fluid escapes from the top surface.
Max fluid pressure = 0.0359 at t = 2000
biphasic
bp21.feb
A biphasic block is attached to an elastic foundation. A mixture traction is prescribed on the biphasic surface.
biphasic
bp22.feb
1D biphasic contact between two bricks under load control (creep), using a rigid interface.
biphasic
bp23.feb
1D confined biphasic creep under the action of a body force
The density of the solid is higher than that of the fluid, leading to creep consolidation under the action of the external body force.
biphasic
bp24.feb
3D axisymmetric analysis of cylindrical plug, modeled as wedge with symmetry plane, loaded under displacement control
The solid deformation and fluid pressure exhibit axisymmetry.
biphasic
bp25.feb
A biphasic block of 10 elements is compressed in the zdirection by 0.1 units in time t=100, then allowed to relax to time t=1000.
biphasic
bp26.feb
This biphasic 1D permeation model implements a nodal load for volumetric flow rate. It also uses the 'fluid flow rate' plot variable.
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