HexahedronCompositeFEMForceFieldAndMass
Non uniform Hexahedral finite elements.
Vec3d
Templates:
- Vec3d
Target: Sofa.Component.SolidMechanics.FEM.NonUniform
namespace: sofa::component::solidmechanics::fem::nonuniform
parents:
- NonUniformHexahedronFEMForceFieldAndMass
Data
| Name | Description | Default value |
|---|---|---|
| name | object name | unnamed |
| printLog | if true, emits extra messages at runtime. | 0 |
| tags | list of the subsets the object belongs to | |
| bbox | this object bounding box | |
| componentState | The state of the component among (Dirty, Valid, Undefined, Loading, Invalid). | Undefined |
| listening | if true, handle the events, otherwise ignore the events | 0 |
| rayleighStiffness | Rayleigh damping - stiffness matrix coefficient | 0 |
| separateGravity | add separately gravity to velocity computation | 0 |
| rayleighMass | Rayleigh damping - mass matrix coefficient | 0 |
| poissonRatio | FEM Poisson Ratio in Hooke's law [0,0.5[ | 0.45 |
| youngModulus | FEM Young's Modulus in Hooke's law | 5000 |
| method | "large" or "polar" or "small" displacements | large |
| updateStiffnessMatrix | 0 | |
| gatherPt | number of dof accumulated per threads during the gather operation (Only use in GPU version) | |
| gatherBsize | number of dof accumulated per threads during the gather operation (Only use in GPU version) | |
| stiffnessMatrices | Stiffness matrices per element (K_i) | |
| initialPoints | Initial Position | |
| massMatrices | Mass matrices per element (M_i) | |
| density | density == volumetric mass in english (kg.m-3) | 1 |
| lumpedMass | Does it use lumped masses? | 0 |
| nbVirtualFinerLevels | use virtual finer levels, in order to compte non-uniform stiffness | 0 |
| useMass | Using this ForceField like a Mass? (rather than using a separated Mass) | 1 |
| totalMass | 0 | |
| finestToCoarse | Does the homogenization is done directly from the finest level to the coarse one? | 0 |
| homogenizationMethod | 0->static, 1->constrained static, 2->modal analysis | 0 |
| completeInterpolation | Is the non-linear, complete interpolation used? | 0 |
| useRamification | If SparseGridRamification, are ramifications taken into account? | 1 |
| Visualization | ||
| drawing | draw the forcefield if true | 1 |
| drawPercentageOffset | size of the hexa | 0.15 |
| drawType | 0 | |
| drawColor | 0 | |
| drawSize | -1 | |
Links
| Name | Description | Destination type name |
|---|---|---|
| context | Graph Node containing this object (or BaseContext::getDefault() if no graph is used) | BaseContext |
| slaves | Sub-objects used internally by this object | BaseObject |
| master | nullptr for regular objects, or master object for which this object is one sub-objects | BaseObject |
| mechanicalStates | List of mechanical states to which this component is associated | BaseMechanicalState |
| mstate | MechanicalState used by this component | MechanicalState<Vec3d> |
| topology | link to the topology container | BaseMeshTopology |
Examples
HexahedronCompositeFEMForceFieldAndMass.scn
<?xml version="1.0" ?>
<Node name="root" gravity="0 -700 0" dt="0.02">
<RequiredPlugin name="Sofa.Component.Collision.Detection.Algorithm"/> <!-- Needed to use components [BVHNarrowPhase BruteForceBroadPhase CollisionPipeline] -->
<RequiredPlugin name="Sofa.Component.Collision.Detection.Intersection"/> <!-- Needed to use components [MinProximityIntersection] -->
<RequiredPlugin name="Sofa.Component.Collision.Geometry"/> <!-- Needed to use components [TriangleCollisionModel] -->
<RequiredPlugin name="Sofa.Component.Collision.Response.Contact"/> <!-- Needed to use components [CollisionResponse] -->
<RequiredPlugin name="Sofa.Component.Constraint.Projective"/> <!-- Needed to use components [FixedProjectiveConstraint] -->
<RequiredPlugin name="Sofa.Component.Engine.Select"/> <!-- Needed to use components [BoxROI] -->
<RequiredPlugin name="Sofa.Component.IO.Mesh"/> <!-- Needed to use components [MeshOBJLoader] -->
<RequiredPlugin name="Sofa.Component.LinearSolver.Iterative"/> <!-- Needed to use components [CGLinearSolver] -->
<RequiredPlugin name="Sofa.Component.Mapping.Linear"/> <!-- Needed to use components [IdentityMapping] -->
<RequiredPlugin name="Sofa.Component.ODESolver.Backward"/> <!-- Needed to use components [EulerImplicitSolver] -->
<RequiredPlugin name="Sofa.Component.SolidMechanics.FEM.NonUniform"/> <!-- Needed to use components [HexahedronCompositeFEMForceFieldAndMass HexahedronCompositeFEMMapping] -->
<RequiredPlugin name="Sofa.Component.StateContainer"/> <!-- Needed to use components [MechanicalObject] -->
<RequiredPlugin name="Sofa.Component.Topology.Container.Constant"/> <!-- Needed to use components [MeshTopology] -->
<RequiredPlugin name="Sofa.Component.Topology.Container.Grid"/> <!-- Needed to use components [SparseGridMultipleTopology] -->
<RequiredPlugin name="Sofa.Component.Visual"/> <!-- Needed to use components [VisualStyle] -->
<RequiredPlugin name="Sofa.GL.Component.Rendering3D"/> <!-- Needed to use components [OglModel] -->
<!-- A soft gelatin object contains 2 bead, one stiff and one soft. Even using large embedding mesh, the
HexahedronCompositeFEM permits to well simulate the global behavior, and the HexahedronCompositeFEMMapping
permits to have a good interpolation of the inside bead behaviors.-->
<DefaultAnimationLoop/>
<VisualStyle displayFlags="showVisual showForceFields" />
<Node name="plane">
<MeshOBJLoader name="meshLoader_0" filename="mesh/plane_loop_2.obj" scale=".2" handleSeams="1" />
<OglModel name="plan" src="@meshLoader_0" rx="90" rz="90" dy="-2.01" material="Default Diffuse 1 1 0.4 0.4 1 Ambient 1 0.8 0.8 0.8 1 Specular 0 1 1 1 1 Emissive 0 1 1 1 1 Shininess 0 45" />
</Node>
<CollisionPipeline depth="6" verbose="0" draw="0" />
<BruteForceBroadPhase/>
<BVHNarrowPhase/>
<MinProximityIntersection name="Proximity" alarmDistance="0.5" contactDistance="0.3" />
<CollisionResponse name="Response" response="PenalityContactForceField" />
<Node name="Composite elements with 3 differents material stiffnesses">
<SparseGridMultipleTopology n="6 3 3" fileTopology="mesh/bubille_out.obj" fileTopologies="mesh/bubille_out.obj mesh/bubille_in1.obj mesh/bubille_in2.obj" nbVirtualFinerLevels="3" finestConnectivity="false" stiffnessCoefs="1 0.0001 50" massCoefs="1 1 1" />
<EulerImplicitSolver vdamping="0" rayleighMass="0" rayleighStiffness="0" />
<CGLinearSolver iterations="100" tolerance="1e-5" threshold="1e-5"/>
<!-- <SparseLDLSolver printLog="false"/>
--> <MechanicalObject />
<HexahedronCompositeFEMForceFieldAndMass drawType="0" lumpedMass="false" nbVirtualFinerLevels="2" youngModulus="600" poissonRatio="0.3" method="polar" density=".1" updateStiffnessMatrix="false" printLog="0" />
<BoxConstraint box="-5 -2.1 -10 10 -1.9 10" />
<Node name="Collinonunif">
<MeshOBJLoader name="loader" filename="mesh/bubille_out.obj" />
<MeshTopology src="@loader" />
<MechanicalObject src="@loader" />
<HexahedronCompositeFEMMapping />
<TriangleCollisionModel />
<Node name="Soft gelatin">
<MeshOBJLoader name="meshLoader_2" filename="mesh/bubille_out.obj" handleSeams="1" />
<OglModel name="VisualBody" src="@meshLoader_2" normals="0" color="0.1 .8 .3 .6" />
<IdentityMapping input="@.." output="@VisualBody" />
</Node>
</Node>
<Node name="soft bead">
<MeshOBJLoader name="meshLoader_1" filename="mesh/bubille_in1.obj" handleSeams="1" />
<OglModel name="VisualBody1" src="@meshLoader_1" normals="0" color="1 0 0 1" />
<HexahedronCompositeFEMMapping input="@.." output="@VisualBody1" />
</Node>
<Node name="stiff bead">
<MeshOBJLoader name="meshLoader_3" filename="mesh/bubille_in2.obj" handleSeams="1" />
<OglModel name="VisualBody2" src="@meshLoader_3" normals="0" color="0 0 1 1" />
<HexahedronCompositeFEMMapping input="@.." output="@VisualBody2" />
</Node>
</Node>
</Node>
def createScene(root_node):
root = root_node.addChild('root', gravity="0 -700 0", dt="0.02")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Detection.Algorithm")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Detection.Intersection")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Geometry")
root.addObject('RequiredPlugin', name="Sofa.Component.Collision.Response.Contact")
root.addObject('RequiredPlugin', name="Sofa.Component.Constraint.Projective")
root.addObject('RequiredPlugin', name="Sofa.Component.Engine.Select")
root.addObject('RequiredPlugin', name="Sofa.Component.IO.Mesh")
root.addObject('RequiredPlugin', name="Sofa.Component.LinearSolver.Iterative")
root.addObject('RequiredPlugin', name="Sofa.Component.Mapping.Linear")
root.addObject('RequiredPlugin', name="Sofa.Component.ODESolver.Backward")
root.addObject('RequiredPlugin', name="Sofa.Component.SolidMechanics.FEM.NonUniform")
root.addObject('RequiredPlugin', name="Sofa.Component.StateContainer")
root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Constant")
root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Grid")
root.addObject('RequiredPlugin', name="Sofa.Component.Visual")
root.addObject('RequiredPlugin', name="Sofa.GL.Component.Rendering3D")
root.addObject('DefaultAnimationLoop', )
root.addObject('VisualStyle', displayFlags="showVisual showForceFields")
plane = root.addChild('plane')
plane.addObject('MeshOBJLoader', name="meshLoader_0", filename="mesh/plane_loop_2.obj", scale=".2", handleSeams="1")
plane.addObject('OglModel', name="plan", src="@meshLoader_0", rx="90", rz="90", dy="-2.01", material="Default Diffuse 1 1 0.4 0.4 1 Ambient 1 0.8 0.8 0.8 1 Specular 0 1 1 1 1 Emissive 0 1 1 1 1 Shininess 0 45")
root.addObject('CollisionPipeline', depth="6", verbose="0", draw="0")
root.addObject('BruteForceBroadPhase', )
root.addObject('BVHNarrowPhase', )
root.addObject('MinProximityIntersection', name="Proximity", alarmDistance="0.5", contactDistance="0.3")
root.addObject('CollisionResponse', name="Response", response="PenalityContactForceField")
composite_elements_with_3_differents_material_stiffnesses = root.addChild('Composite elements with 3 differents material stiffnesses')
composite_elements_with_3_differents_material_stiffnesses.addObject('SparseGridMultipleTopology', n="6 3 3", fileTopology="mesh/bubille_out.obj", fileTopologies="mesh/bubille_out.obj mesh/bubille_in1.obj mesh/bubille_in2.obj", nbVirtualFinerLevels="3", finestConnectivity="false", stiffnessCoefs="1 0.0001 50", massCoefs="1 1 1")
composite_elements_with_3_differents_material_stiffnesses.addObject('EulerImplicitSolver', vdamping="0", rayleighMass="0", rayleighStiffness="0")
composite_elements_with_3_differents_material_stiffnesses.addObject('CGLinearSolver', iterations="100", tolerance="1e-5", threshold="1e-5")
composite_elements_with_3_differents_material_stiffnesses.addObject('MechanicalObject', )
composite_elements_with_3_differents_material_stiffnesses.addObject('HexahedronCompositeFEMForceFieldAndMass', drawType="0", lumpedMass="false", nbVirtualFinerLevels="2", youngModulus="600", poissonRatio="0.3", method="polar", density=".1", updateStiffnessMatrix="false", printLog="0")
composite_elements_with_3_differents_material_stiffnesses.addObject('BoxConstraint', box="-5 -2.1 -10 10 -1.9 10")
collinonunif = Composite elements with 3 differents material stiffnesses.addChild('Collinonunif')
collinonunif.addObject('MeshOBJLoader', name="loader", filename="mesh/bubille_out.obj")
collinonunif.addObject('MeshTopology', src="@loader")
collinonunif.addObject('MechanicalObject', src="@loader")
collinonunif.addObject('HexahedronCompositeFEMMapping', )
collinonunif.addObject('TriangleCollisionModel', )
soft_gelatin = Collinonunif.addChild('Soft gelatin')
soft_gelatin.addObject('MeshOBJLoader', name="meshLoader_2", filename="mesh/bubille_out.obj", handleSeams="1")
soft_gelatin.addObject('OglModel', name="VisualBody", src="@meshLoader_2", normals="0", color="0.1 .8 .3 .6")
soft_gelatin.addObject('IdentityMapping', input="@..", output="@VisualBody")
soft_bead = Composite elements with 3 differents material stiffnesses.addChild('soft bead')
soft_bead.addObject('MeshOBJLoader', name="meshLoader_1", filename="mesh/bubille_in1.obj", handleSeams="1")
soft_bead.addObject('OglModel', name="VisualBody1", src="@meshLoader_1", normals="0", color="1 0 0 1")
soft_bead.addObject('HexahedronCompositeFEMMapping', input="@..", output="@VisualBody1")
stiff_bead = Composite elements with 3 differents material stiffnesses.addChild('stiff bead')
stiff_bead.addObject('MeshOBJLoader', name="meshLoader_3", filename="mesh/bubille_in2.obj", handleSeams="1")
stiff_bead.addObject('OglModel', name="VisualBody2", src="@meshLoader_3", normals="0", color="0 0 1 1")
stiff_bead.addObject('HexahedronCompositeFEMMapping', input="@..", output="@VisualBody2")