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------------------------------------------------------------
revno: 3896
committer: Klaus Thoeni <klaus.thoeni@xxxxxxxxx>
timestamp: Fri 2016-06-10 21:12:01 +1000
message:
  examples for cylinder and cylinderConnection
added:
  examples/cylinders/
  examples/cylinders/bendingbeams.py
  examples/cylinders/cylinder-cylinder.py


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=== added directory 'examples/cylinders'
=== added file 'examples/cylinders/bendingbeams.py'
--- examples/cylinders/bendingbeams.py	1970-01-01 00:00:00 +0000
+++ examples/cylinders/bendingbeams.py	2016-06-10 11:12:01 +0000
@@ -0,0 +1,62 @@
+# encoding: utf-8
+"An example showing various bending beams."
+
+from yade.gridpfacet import *
+
+#### Parameters ####
+L=10.   # length of the beam
+n=12	# number of nodes used to generate the beam
+r=L/50.	# radius of the beam element
+
+#### Engines ####
+O.engines=[
+	ForceResetter(),
+	InsertionSortCollider([Bo1_GridConnection_Aabb()]),
+	InteractionLoop(
+		[Ig2_GridNode_GridNode_GridNodeGeom6D()],
+		[Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=True,setCohesionOnNewContacts=False)],
+		[Law2_ScGeom6D_CohFrictPhys_CohesionMoment()]
+	),
+	NewtonIntegrator(gravity=(0,0,-10),damping=0.5,label='newton')
+]
+
+#### Creat materials and set different properties ####
+O.materials.append(CohFrictMat(young=1e6,poisson=0.3,density=1e1,frictionAngle=10,normalCohesion=1e7,shearCohesion=1e7,momentRotationLaw=False,label='mat1'))
+O.materials.append(CohFrictMat(young=1e6,poisson=0.3,density=1e1,frictionAngle=10,normalCohesion=1e7,shearCohesion=1e7,momentRotationLaw=True,label='mat2'))
+O.materials.append(CohFrictMat(young=3e6,poisson=0.3,density=1e1,frictionAngle=10,normalCohesion=1e7,shearCohesion=1e7,momentRotationLaw=True,label='mat3'))
+O.materials.append(CohFrictMat(young=1e7,poisson=0.3,density=1e1,frictionAngle=10,normalCohesion=1e7,shearCohesion=1e7,momentRotationLaw=True,label='mat4'))
+
+#### Vertices ####
+vertices1=[]
+vertices2=[]
+vertices3=[]
+vertices4=[]
+for i in range(0,n):
+  vertices1.append( ([i*L/n,0,0]) )
+  vertices2.append( ([i*L/n,1,0]) )
+  vertices3.append( ([i*L/n,2,0]) )
+  vertices4.append( ([i*L/n,3,0]) )
+
+#### Create cylinder connections ####
+nodesIds=[]
+cylIds=[]
+cylinderConnection(vertices1,r,nodesIds,cylIds,color=[1,0,0],highlight=False,intMaterial='mat1')
+cylinderConnection(vertices2,r,nodesIds,cylIds,color=[0,1,0],highlight=False,intMaterial='mat2')
+cylinderConnection(vertices3,r,nodesIds,cylIds,color=[0,0,1],highlight=False,intMaterial='mat3')
+cylinderConnection(vertices4,r,nodesIds,cylIds,color=[1,1,1],highlight=False,intMaterial='mat4')
+
+#### Set boundary conditions ####
+for i in range(0,4):
+   O.bodies[nodesIds[i*n]].dynamic=False
+#   O.bodies[nodesIds[i*n]].state.blockedDOFs='xyzXYZ'
+#   O.bodies[nodesIds[i*n]].state.blockedDOFs='xyz'
+
+#### For viewing ####
+from yade import qt
+qt.View()
+
+#### Set a time step ####
+O.dt=1e-05
+
+#### Allows to reload the simulation ####
+O.saveTmp()

=== added file 'examples/cylinders/cylinder-cylinder.py'
--- examples/cylinders/cylinder-cylinder.py	1970-01-01 00:00:00 +0000
+++ examples/cylinders/cylinder-cylinder.py	2016-06-10 11:12:01 +0000
@@ -0,0 +1,64 @@
+# encoding: utf-8
+"An example showing how to create two cylinders which are interacting."
+
+from yade.gridpfacet import *
+
+#### Parameters ####
+L=1.		# length of the cylinder element
+r=0.1		# radius of the cylinder element
+phi=30.	# friction angle
+E=1e6		# Young's modulus
+
+#### Engines ####
+O.engines=[
+	ForceResetter(),
+	InsertionSortCollider([
+		#Bo1_Sphere_Aabb(),
+		Bo1_GridConnection_Aabb(),
+	]),
+	InteractionLoop([
+		Ig2_GridNode_GridNode_GridNodeGeom6D(),
+		Ig2_GridConnection_GridConnection_GridCoGridCoGeom(),
+	],
+	[
+		Ip2_CohFrictMat_CohFrictMat_CohFrictPhys(setCohesionNow=True,setCohesionOnNewContacts=False),	# internal cylinder physics
+		Ip2_FrictMat_FrictMat_FrictPhys()	# physics for external interactions, i.e., cylinder-cylinder interaction
+	],
+	[
+		Law2_ScGeom6D_CohFrictPhys_CohesionMoment(),	# contact law for "internal" cylider forces
+		Law2_GridCoGridCoGeom_FrictPhys_CundallStrack()	# contact law for cylinder-cylinder interaction
+	]
+	),
+	NewtonIntegrator(gravity=(-0.,0,-10),damping=0.5,label='newton'),
+]
+
+#### Creat materials ####
+O.materials.append( CohFrictMat( young=E,poisson=0.3,density=1000,frictionAngle=radians(phi),normalCohesion=1e10,shearCohesion=1e10,momentRotationLaw=True,label='cMat' ) )  # material to create the gridConnections
+O.materials.append( FrictMat( young=E,poisson=0.3,density=1000,frictionAngle=radians(phi),label='fMat' ) )  # material for general interactions
+
+#### Create cylinders ####
+nodesIds=[]
+cylIds=[]
+cylinder((0,0,0),(L,0,0),radius=r,nodesIds=nodesIds,cylIds=cylIds,
+				 fixed=True,color=[1,0,0],intMaterial='cMat',extMaterial='fMat')
+cylinder((L/4,2*L/3,L),(L/4,-L/3,L),radius=r,nodesIds=nodesIds,cylIds=cylIds,
+				 fixed=False,color=[0,1,0],intMaterial='cMat',extMaterial='fMat')
+cylinder((0,2*L/3,L),(0,-L/3,L),radius=r,nodesIds=nodesIds,cylIds=cylIds,
+				 fixed=False,color=[0,1,0],intMaterial='cMat',extMaterial='fMat')
+cylinder((L/2,L/2,L),(L/2,-L/2,L),radius=r,nodesIds=nodesIds,cylIds=cylIds,
+				 fixed=False,color=[0,1,1],intMaterial='cMat',extMaterial='fMat')
+cylinder((3*L/4,L/3,L),(3*L/4,-2*L/3,L),radius=r,nodesIds=nodesIds,cylIds=cylIds,
+				 fixed=False,color=[0,0,1],intMaterial='cMat',extMaterial='fMat')
+cylinder((L,L/3,L),(L,-2*L/3,L),radius=r,nodesIds=nodesIds,cylIds=cylIds,
+				 fixed=False,color=[0,0,1],intMaterial='cMat',extMaterial='fMat')
+
+#### For viewing ####
+from yade import qt
+qt.View()
+Gl1_Sphere.stripes=True
+
+#### Set a time step ####
+O.dt=1e-06
+
+#### Allows to reload the simulation ####
+O.saveTmp()