SET OF FACES

[aerospace7]

hi all,

first of all sorry for my bad english.
i am finding problems in creating a set with 4 faces. this faces are obtained with the command getByBoundingBox(...). Now the output of this command is a FaceArray object, which is a sequence of Face objects, that i can use for generate a set. I only need the first two elements of this array for generate my Set, and here comes the issues. Abaqus gives me the error: FEATURE CREATION FAILED. where is the error in my script?

facesinthebox=mdb.models['Model-1'].parts['Gruppo Ordinate'].faces.getByBoundingBox(-C2[0]-100,-C4[1],-CMX-wwb/2-Lo,C2[0]+100,C4[1],-CMX-wwb/2)
upperfaces=[]
upperfaces.append(facesinthebox[0])
upperfaces.append(facesinthebox[1])


mdb.models['Model-1'].parts['Gruppo Ordinate'].Set(faces=upperfaces,name='Set-1')

if i use this command:

mdb.models['Model-1'].parts['Gruppo Ordinate'].Set(faces=faceinthebox,name='Set-1')

there is no problems.

if i use this commands:

mdb.models['Model-1'].parts['Gruppo Ordinate'].Set(faces=(faceinthebox[0],faceinthebox[1]),name='Set-1')

still get the same error as before. where am I doing wrong?

 

[Mustaine3]

When you print type(facesinthebox) and type(upperfaces) then you'll see that these are not the same datatypes.
The set command is expecting a face array and not a list. A face array a is Abaqus specific datatype.

You can do it like that:

p = mdb.models['Model-1'].parts['Part-1']

fib = p.faces.getByBoundingBox(-50,-50,-50,50,50,50)
fib1 = fib[0].index
fib2 = fib[1].index
setfaces = p.faces[fib1:fib1+1]+p.faces[fib2:fib2+1]
p.Set(faces=setfaces, name='Set-1')

 

[aerospace7]

nice! thank you very much! this quite solved my problem. But now i have a new issues. This faces in the boc are 4. Now i have to create 24 boxes, in which are contained always 4 faces. i just notice that abaqus gives to this 4 faces index at random, so i cant take always the first 2 faces ( [0].[1]). how can i tell to abaqus to create a set only with the 2 faces that have the Z-coord greater among the 4?

 

[Mustaine3]

fib is like a list of faces and when you look at "print fib[0]" you'll find a pointOn information. 'same for each other face. Or you use getCentroid() on each face.