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Old   March 9, 2015, 17:09
Default Boolean operation failed
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Hi everyone,

I'm in need of urgent help pls.

I tried creating a boolean subtraction, i.e, to subtract the cylinder surface from the rectangular domain as in the picture below, but it didn't work. Could someone explain how I could do this.

Thanks
Boolean problem.jpg
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Old   March 10, 2015, 04:30
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hey
do you set correct setup for boolean setting? what is target and tool bodies!?
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Old   March 10, 2015, 11:54
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Hiya,

Yes, I did. The target body is the rectangle's surface body, and the tool body the cylinder's. I think the problem is, because the cylinder rests on the rectangle it cannot subtract.

Is there any other way I can perform flow over a cylinder with that setup without performing a boolean operation.

Thanks for your kind help.
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Old   March 10, 2015, 13:58
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maybe!
anyway, you can use "cut material" in cylinder part
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Old   March 10, 2015, 14:07
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Sorry, that didn't work either.
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Old   March 11, 2015, 01:11
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the problem cud be that both are sharing same surface!
Try to make separate part for each and then Boolean it.

also can you check what error it is giving when you are trying to Boolean it?
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Old   March 11, 2015, 04:03
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Hi Kapi,

They are different parts.

The warning message is:

Operation would result to non-manifold bodies.
Context: Geometry Engine; while generating Feature Boolean1

Thanks for your help.
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Old   March 11, 2015, 05:46
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your sketch is simple! you can draw all of them in one part! without boolean or cut material! draw your rectangle and circle in one part and use "trim".
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Old   March 11, 2015, 06:11
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Hi Amin,

I don't understand. Is the use of trim not applicable to lines? Well, I tried it as suggested but it trimmed off the lines of the circle.

I want to remove the circular surface from the rectangle, but it results to 0 thickness where the circle intersects with the rectangle. Hence the error message of non-manifold body. I am sure there is a way around this, which I don't know.

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Old   March 11, 2015, 08:05
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it isn't clear! if you want you can give me your model dimension and I will try to evaluate it...
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Old   March 11, 2015, 09:08
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Hi Amin,

Sorry, I'm new to modelling hence I don't understand much.

I have attached the geometry below.

Thanks for your help.

Regards

geometry.PNG
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Old   March 11, 2015, 09:12
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Quote:
Originally Posted by pogbodo View Post
Hi Amin,

Sorry, I'm new to modelling hence I don't understand much.

I have attached the geometry below.

Thanks for your help.

Regards

Attachment 37734
no problem friend!
now I'm in my office, when I came back to the home, I will find a free time and evaluate it...
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Old   March 12, 2015, 02:45
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well
the problem solved! there are different ways to design this sketch
a simple way:
draw main rectangle with these dimensions: 600*210 mm (20 mm below the x axis)
draw the circle: R=20mm
do a boolean
draw a fake rectangle from tangent to the circle ( 10 mm below the x axis)
subtract fake rectangle from main rectangle
Attached Images
File Type: jpg rec.jpg (40.7 KB, 5 views)
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Old   March 12, 2015, 18:26
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Hi Amin.z,

Thank you so much for your help. I truly appreciate it.

Regards,

Precious.
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