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Forming Capability Differences due to rolling diff. (R0, R45, R90)

Forming Capability Differences due to rolling diff. (R0, R45, R90)

Forming Capability Differences due to rolling diff. (R0, R45, R90)

(OP)
My company has ran into a job using AL2024 T42 (0.050" thickness) which wrinkle constantly in the middle( part look like a saddle).  The finite element analysis result shows if I can increasing the material's R0, R45 and R90 property to be greater than one then I can solve this problem.  Are there good literatures I can learn more about what are R0, R45, R90 and their impact to forming capability? Is there any mill house can deliver special property requirment like these?

RE: Forming Capability Differences due to rolling diff. (R0, R45, R90)

This paper:

http://www.egr.msu.edu/~aenader/FILES/JPapers/IJP-Part1.pdf

for a different alloy, suggests that the coefficients may all go above unity at high  temperature.  How do you feel about elevated temperature forming?

Mike Halloran
Pembroke Pines, FL, USA

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