# Amira Abdel-Rahman # (c) Massachusetts Institute of Technology 2020 ######################### 1. Voxel Design ########################### setup = Dict() ### 1.b Draw Lattice rhino=true voxelSize=62.825 latticeSizeX=15 latticeSizeY=3 latticeSizeZ=4 gridSize=20 setup["gridSize"]=gridSize setup["rhino"]=rhino setup["rhinoFileName"]="./julia/examples/CAD_Rhino/wing.3dm"; setup["layerIndex"]="1"; setup["useVoxelList"]=false setup["latticeSizeX"]=1 setup["latticeSizeY"]=1 setup["latticeSizeZ"]=1 ######################### 2. Boundary Conditions ######################### ######################### 2.a. Global Settings ######################### #scaling params setup["voxelSize"]=voxelSize; #voxel size setup["scale"]=0.1; #scale for visualization setup["hierarchical"]=false; #hierachical simualtion #simulation params setup["numTimeSteps"]=10000; #num of timesteps for simulation setup["poisson"]=false; # account for poisson ration (only for hierarchical) setup["linear"]=true; # linear vs non-linear setup["thermal"]=false; #if there is change in temperature setup["globalDamping"]=0.2; # (usually from 0.1 to 0.4) #visualization params setup["maxNumFiles"]=50; #num of saved timesteps for visualization, make sure it's bigger than numTimeSteps ######################### 2.b. Materials ######################### #default material material1= Dict() material1["area"]=2.38*2.38*7*7 material1["density"]=0.028 material1["stiffness"]=2000.0 material1["poissonRatio"]=0.0 material1["cTE"]=0.0 #coefficient of thermal expansion #large bounding box for default material boundingBoxMaterial1=Dict() boundingBoxMaterial1["min"]=Dict() boundingBoxMaterial1["max"]=Dict() boundingBoxMaterial1["min"]["x"]=-voxelSize*gridSize; boundingBoxMaterial1["min"]["y"]=-voxelSize*gridSize; boundingBoxMaterial1["min"]["z"]=-voxelSize*gridSize; boundingBoxMaterial1["max"]["x"]= voxelSize*gridSize; boundingBoxMaterial1["max"]["y"]= voxelSize*gridSize; boundingBoxMaterial1["max"]["z"]= voxelSize*gridSize; setup["materials"]=[ [boundingBoxMaterial1,material1] ]; ######################### 2.c. Supports ######################### #x,y,z,rx,ry,rz (default is pinned joing i.e [false,false,false,true,true,true]) dof=[true,true,true,true,true,true] boundingBoxSupport1=Dict() boundingBoxSupport1["min"]=Dict() boundingBoxSupport1["max"]=Dict() boundingBoxSupport1["min"]["x"]=-voxelSize/2.0; boundingBoxSupport1["min"]["y"]=-voxelSize/2.0; boundingBoxSupport1["min"]["z"]=-voxelSize/2.0; boundingBoxSupport1["max"]["x"]= voxelSize/4.0; boundingBoxSupport1["max"]["y"]= voxelSize*(latticeSizeY)+voxelSize/4.0; boundingBoxSupport1["max"]["z"]= voxelSize*(latticeSizeZ)+voxelSize/4.0; setup["supports"]=[ [boundingBoxSupport1,dof] ]; ######################### 2.d. Loads ######################### #### 2.d.1 Static Loads load1=Dict() load1["x"]=0.0 load1["y"]=-1e2 load1["z"]=0.0 boundingBoxLoad1=Dict() boundingBoxLoad1["min"]=Dict() boundingBoxLoad1["max"]=Dict() boundingBoxLoad1["min"]["x"]=-voxelSize*gridSize; boundingBoxLoad1["min"]["y"]=-voxelSize*gridSize; boundingBoxLoad1["min"]["z"]=-voxelSize*gridSize; boundingBoxLoad1["max"]["x"]=voxelSize*gridSize; boundingBoxLoad1["max"]["y"]=voxelSize*gridSize; boundingBoxLoad1["max"]["z"]=voxelSize*gridSize; load2=Dict() load2["x"]=-1e5 load2["y"]=0 load2["z"]=0 boundingBoxLoad2=Dict() boundingBoxLoad2["min"]=Dict() boundingBoxLoad2["max"]=Dict() boundingBoxLoad2["min"]["x"]=6*voxelSize-voxelSize/4.0; boundingBoxLoad2["min"]["y"]=-voxelSize/2.0; boundingBoxLoad2["min"]["z"]=-voxelSize/2.0; boundingBoxLoad2["max"]["x"]=6*voxelSize+voxelSize/4.0; boundingBoxLoad2["max"]["y"]=voxelSize/4.0; boundingBoxLoad2["max"]["z"]=voxelSize*(latticeSizeZ)+voxelSize/4.0; setup["loads"]=[ [boundingBoxLoad1,load1], [boundingBoxLoad2,load2], ]; #### 2.d.2 Fixed Displacements dis1=Dict() dis1["x"]=0.0 dis1["y"]=-5e-3 dis1["z"]=0.0 boundingBoxDis1=Dict() boundingBoxDis1["min"]=Dict() boundingBoxDis1["max"]=Dict() boundingBoxDis1["min"]["x"]=-voxelSize/4.0; boundingBoxDis1["min"]["y"]=voxelSize*(latticeSizeY)-voxelSize/8; boundingBoxDis1["min"]["z"]=-voxelSize/2.0; boundingBoxDis1["max"]["x"]=voxelSize*(latticeSizeX)+voxelSize/4.0; boundingBoxDis1["max"]["y"]=voxelSize*(latticeSizeY)+voxelSize/2.0; boundingBoxDis1["max"]["z"]=voxelSize*(latticeSizeZ)+voxelSize/4.0; setup["fixedDisplacements"]=[ # [boundingBoxDis1,dis1] ]; #### 2.d.3 Dynamic Loads function floorEnabled() return false end function gravityEnabled() return false end function externalDisplacement(currentTimeStep,N_position,N_fixedDisplacement) return N_fixedDisplacement end function externalForce(currentTimeStep,N_position,N_force) return N_force end function updateTemperature(currentRestLength,currentTimeStep,mat) # @cuprintln("currentRestLength $currentRestLength") return currentRestLength end ###########################################################################