[DesignModeler] Boolean operation failed

pogbodo · March 9, 2015, 16:09

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

amin.z · March 10, 2015, 03:30

hey
do you set correct setup for boolean setting? what is target and tool bodies!?

pogbodo · March 10, 2015, 10:54

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.

amin.z · March 10, 2015, 12:58

maybe!
anyway, you can use "cut material" in cylinder part

pogbodo · March 10, 2015, 13:07

Sorry, that didn't work either.

Kapi · March 11, 2015, 00:11

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?

pogbodo · March 11, 2015, 03:03

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.

amin.z · March 11, 2015, 04:46

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".

pogbodo · March 11, 2015, 05:11

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.

Regards.

amin.z · March 11, 2015, 07:05

it isn't clear! if you want you can give me your model dimension and I will try to evaluate it...

pogbodo · March 11, 2015, 08:08

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

amin.z · March 11, 2015, 08:12

Quote:

Originally Posted by pogbodo

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...

amin.z · March 12, 2015, 01:45

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

pogbodo · March 12, 2015, 17:26

Hi Amin.z,

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

Regards,

Precious.

March 9, 2015, 16:09	Boolean operation failed	#1
pogbodo New Member Aberdeenshire Join Date: Feb 2015 Posts: 11 Rep Power: 11	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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March 10, 2015, 03:30		#2
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 14	hey do you set correct setup for boolean setting? what is target and tool bodies!?

March 10, 2015, 10:54		#3
pogbodo New Member Aberdeenshire Join Date: Feb 2015 Posts: 11 Rep Power: 11	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.

March 10, 2015, 12:58		#4
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 14	maybe! anyway, you can use "cut material" in cylinder part

March 10, 2015, 13:07		#5
pogbodo New Member Aberdeenshire Join Date: Feb 2015 Posts: 11 Rep Power: 11	Sorry, that didn't work either.

March 11, 2015, 00:11		#6
Kapi Senior Member Join Date: Apr 2014 Location: Melbourne Posts: 584 Rep Power: 14	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?

March 11, 2015, 03:03		#7
pogbodo New Member Aberdeenshire Join Date: Feb 2015 Posts: 11 Rep Power: 11	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.

March 11, 2015, 04:46		#8
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 14	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".

March 11, 2015, 05:11		#9
pogbodo New Member Aberdeenshire Join Date: Feb 2015 Posts: 11 Rep Power: 11	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. Regards.

March 11, 2015, 07:05		#10
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 14	it isn't clear! if you want you can give me your model dimension and I will try to evaluate it...

March 11, 2015, 08:08		#11
pogbodo New Member Aberdeenshire Join Date: Feb 2015 Posts: 11 Rep Power: 11	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

March 12, 2015, 17:26		#14
pogbodo New Member Aberdeenshire Join Date: Feb 2015 Posts: 11 Rep Power: 11	Hi Amin.z, Thank you so much for your help. I truly appreciate it. Regards, Precious.