Newer
Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
# Amira Abdel-Rahman
# (c) Massachusetts Institute of Technology 2020
######################### 1. Voxel Design ###########################
setup = Dict()
### 1.b Draw Lattice
rhino=false
voxelSize=75
latticeSizeX=3
latticeSizeY=3
latticeSizeZ=3
gridSize=10
setup["gridSize"]=gridSize
setup["rhino"]=false
setup["latticeSizeX"]=latticeSizeX
setup["latticeSizeY"]=latticeSizeY
setup["latticeSizeZ"]=latticeSizeZ
######################### 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"]=1000; #num of saved 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"]=100; #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
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"]=0.0;
boundingBoxSupport1["min"]["y"]=0.0;
boundingBoxSupport1["min"]["z"]=0.0;
boundingBoxSupport1["max"]["x"]= voxelSize*(latticeSizeX);
boundingBoxSupport1["max"]["y"]= voxelSize/4;
boundingBoxSupport1["max"]["z"]= voxelSize*(latticeSizeZ);
setup["supports"]=[
[boundingBoxSupport1,dof]
];
######################### 2.d. Loads #########################
#### 2.d.1 Static Loads
load1=Dict()
load1["x"]=0.0
load1["y"]=-1e5
load1["z"]=0.0
boundingBoxLoad1=Dict()
boundingBoxLoad1["min"]=Dict()
boundingBoxLoad1["max"]=Dict()
boundingBoxLoad1["min"]["x"]=0;
boundingBoxLoad1["min"]["y"]=voxelSize*(latticeSizeY)-voxelSize/4;
boundingBoxLoad1["min"]["z"]=0;
boundingBoxLoad1["max"]["x"]=voxelSize*(latticeSizeX);
boundingBoxLoad1["max"]["y"]=voxelSize*(latticeSizeY);
boundingBoxLoad1["max"]["z"]=voxelSize*(latticeSizeZ);
setup["loads"]=[
[boundingBoxLoad1,load1]
];
setup["fixedDisplacements"]=[];
#### 2.d.2 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
###########################################################################