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I'm used to calculate the minimum radius required for bending operations on both aluminum and steel sheets, given the following parameters: https://i.sstatic.net/yxEBc.jpg

Problem statement:

For a sheet metal stock with inch thickness, determine the minimum tool radius for both the steel and aluminum alloys that will not tear the material. Assume the sheet of material is in pure bending (i.e., no additional tension is applied during forming).

I have already learned about the following formulas:

  • R = 1/k
  • k(y) = e(y) / (h/2)
  • e(y) = k.y

Given that R = 1/k, the next step is to find the maximum curvature k for each sheet.

The problem is that I don't know how to find the maximum curvature, and I'm still stuck.

Any thoughts?

do-the-thing-please
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user6039980
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1 Answers1

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I hope the following helps. This is from a book I used in college. Manufacturing Engineering and Technology, 5th Ed. by Kalpakjian and Schmid

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Minimum Bend Radius

Where **r** is the tensile reduction of area.

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