Re: [femm] 'block' and 'group' confussion

[Keith Gregory <k.gregory@xxxxxxxxxxx>]

JATL

A block definition is used to specify the material properties of all 
discrete regions in a problem. For example, any regions containing air, 
iron, copper, etc. would EACH have their own block definition. Regions can 
use the same material but all regions require a block definition. Block 
definitions can also be used to control the mesh size in different regions 
of a problem.

A group is just a collection of entities that are linked together to allow 
operations such as copying. moving rotating etc. to be made on all of them 
at the same time. Any nodes, segments, arc segments or block definitions 
can be grouped together. Say that you are setting up a problem in which a 
collection of 4 nodes, 4 segments and a block definition is copied several 
times. Select all of the nodes hit the space bar and in the group box enter 
a number (say 1). Then, select all the segments hit the space bar and enter 
the same number in the group box, then select the block and again enter the 
same number in the group box. You can then select the whole group with the 
group button and copy the whole group as many times as you like.

Keith.
Keith.

At 22:21 09/12/2002 +0000, you wrote:
> Hi...
>
> Could anyone clarify me the difference between 'block' and 'group'?.
> What is the utility and how I can set them...I am a litlle confuse
> with these two concept.
>
> Thanks...
>
> JATL
>
>
>
>
>
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