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How does the direction arrow effect the unbend results?

The arrow is the material side, so determines whether the skin you are working on was "inside" or "outside of material.  Which is important as the outside round is elongated material, the inside round is compressed material.  Arrow side has a pronounced affect on the end length of the unbend, but it works also in conjunction with the K factor value, which is where inside the material thickness the neutral plane is.  So flipping the arrow will move the neutral plane either over or under the faces you are working on.

Explanation of K factor:

Now consider a case like this, 6 identical simple bends:


Given the settings, The bend radius varies in all 6 cases, as the neutral plane is moved farther away from the surfaces, and also if the material side is flipped by flipping the arrow.  The overall length then must also be different.  The blue line is drawn at inside material, .5 K factor as a length reference.

 
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  • Topic #: 5605-3286
  • Date Created: 01/12/2018
  • Last Updated: 01/12/2018
  • Viewed: 2
How does the direction arrow effect the unbend results?
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Topic 5605-3286

How does the direction arrow effect the unbend results?

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