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Bending Aluminium

Bending Aluminium

Bending Aluminium


I'm looking for a formula that describes the bending behavior of Aluminum (in function of Al-type thickness, shape,…); I want to know at what bending angle aluminum starts to deform (so not springs back to his initial position).

 R. Litz

RE: Bending Aluminium


Unless You are dealing with "annealed or low-alloyed" aluminum there WILL be a critical minimum bend-radius and a minimum "spring-back" factor in every case. Note: for virtually every alloy/temper combination [or "similar-to" combination] this data is published. I use company data so I can't send you numbers; however, many aircraft sheet metal fab manuals have this data.

Note: simple bend-tests should confirm min BR and spring-back for various samples.

NOTE: this data is usually valid for STRAIGHT-LINE bends using constrained tooling, such as a "break" with radiused edges. Caution: bends thru a curve CAN present different challenges!!!

NOTE: deburr edges carefully and examine outer BR surfaces and edges with 10X--50X magnification for signs of cracking [NDI if questionable].

Regards, Wil Taylor

RE: Bending Aluminium

When the material Yield strenght is excceed, then permanent deformation takes place

RE: Bending Aluminium

I had the same question in the past and someone gave me a bending calculator software is pretty handy and it helps to reduce testing.  email me and I'll send it to you


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