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blend is magic!! more volume for your money (#1994)
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la mouche  
#1 Posted : Tuesday, January 27, 2009 10:45:36 AM(UTC)
la mouche

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Joined: 3/14/2007(UTC)
Posts: 757
:eek::eek::eek::eek:

Hello,

please see the attached files.

is it normal that more than volume if the model 3d is folded?

oh!

CAD is maaaaagic!!!

hum..

Antoine
la mouche attached the following image(s):
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Tim Olson  
#2 Posted : Tuesday, January 27, 2009 12:22:15 PM(UTC)
Tim Olson

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Hi Antoine,

>>>CAD is maaaaagic!!!

:)

Yes, this is the correct behaviour for the tool.

The interior perimeter remains the same. The exterior expands.

Tim
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Tim Olson
IMSI Design/Encore
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jdi000  
#3 Posted : Tuesday, January 27, 2009 1:45:15 PM(UTC)
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Tim

How is the perimeter command activated??? Is this the perimeter of exploded edges of the bent part? Are they individual connected or joined curves(spline)?



Thanks

Jason
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Tim Olson  
#4 Posted : Tuesday, January 27, 2009 3:05:13 PM(UTC)
Tim Olson

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>>How is the perimeter command activated???

I saw your post and added in new Verify:Perimeter command. I've had more than a few requests for that tool. Just happened to come in handy regarding Antoine post:)


>>Is this the perimeter of exploded edges of the bent part?
For the above image, i exploded. Will look into adding only selected edges of a solid/surface.

>>Are they individual connected or joined curves(spline)?

Just objects, no connection or joining required.

Tim
Tim Olson
IMSI Design/Encore
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la mouche  
#5 Posted : Wednesday, January 28, 2009 3:23:19 AM(UTC)
la mouche

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Posts: 757
Hello,

hum ...:confused:

I ask my question differently.

In reality, a bended sheet is not more volume, if bended ....

can you explain the philosophy of Shark FX?

realy CAD?

or

modeler volume/surface ...


In this case, Shark FX is for illustrators, and not for the industrial designer... ouch!! :)

If Shark FX is a realy CAD program, i think you should resolve this (problem), right?

Thanks Tim and Co, for your best work!

Antoine
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Tim Olson  
#6 Posted : Wednesday, January 28, 2009 11:03:24 AM(UTC)
Tim Olson

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>>In reality, a bended sheet is not more volume, if bended ....

The bending tool adds volume. The amount it adds is a function of the bend angle and radius. Note in the image I attached the outside radius is larger then the inside radius by the material thickness. Consider this the stretched or expanded region.

Keep in mind the bend tool is a mathematical model of bending where the bend region maintains constant thickness. Actual physical bending generally involve complex deformations (compression and expansion) based on the material.


>>realy CAD?
>>
>>or
>>
>>modeler volume/surface ...

Shark is a precision CAD application suitable for interfacing with CAM or CAE. Key to the precision aspect is the use of ACIS which is an industry standard geometry kernel for CAD as well as CAM/CAE applications. ACIS provides a kernel that integrates wireframe model, surface, and solid modeling functionality with both manifold and non-manifold topology. For more info...

http://en.wikipedia.org/wiki/ACIS

A bit of ACIS trivia...before designing the ACIS kernel, these guys designed ParaSolids.



>>If Shark FX is a realy CAD program, i think you should resolve this >>(problem), right?

The tool is behaving correctly:)


Tim
Tim Olson
IMSI Design/Encore
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jlm  
#7 Posted : Wednesday, January 28, 2009 1:21:07 PM(UTC)
jlm

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Originally Posted by: Tim Olson Go to Quoted Post
The amount it adds is a function of the bend angle and radius. Note in the image I attached the outside radius is larger then the inside radius by the material thickness. Consider this the stretched or expanded region.


Dear Tim,
I agree with Antoine : it should use the "neutral fiber" (medium line) as the reference radius to bend a solid, as it happens in real life.
It should compress as much inside as it expands outside...

JL
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Tim Olson  
#8 Posted : Wednesday, January 28, 2009 1:38:12 PM(UTC)
Tim Olson

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Originally Posted by: jlm Go to Quoted Post
Dear Tim,
I agree with Antoine : it should use the "neutral fiber" (medium line) as the reference radius to bend a solid, as it happens in real life.
It should compress as much inside as it expands outside...

JL


JL

Then bend around a line in the middle of the body.

The bend I'm showing is a bend on the top of the face. The neutral line (where no compress/expansion occurs) is defined by the two points for the bend axis.

Tim
Tim Olson
IMSI Design/Encore
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la mouche  
#9 Posted : Tuesday, February 3, 2009 3:36:39 AM(UTC)
la mouche

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Posts: 757
Hello,

Thanks Tim for your explanation.

Cordialy.

Antoine
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