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Abstract: The
instability wrinkling is the key problem urgently to be solved in the
research of strip metal in-plane bending under unequal compressing. A
unified mathematic description with more explicit physical meaning of
internal and external wrinkling wave on the strip of in-plane bending is
established, and it is easy to solve. And a unified criterion of
internal and external wrinkling is established, then how to combine the
FEM simulation system to make the numerical prediction of wrinkling into
reality is also resolved. The experiments carried out show that the
unified criterion of the wrinkling is reliable. The effects of the
geometrical parameters, the material properties and the friction factor
on the deforming result are analyzed by using the unified predict
criterion. The results can serve as a significant guide to the design
and optimization of the process.
Key words: In-plane bending Wrinkling Waveform function
Rigid-plastic FEM
CLC No: TG386
国家自然科学基金(59475059)和国家杰出青年科学基金(50225518)资助项目.
Received 20040809, received in revised form 20041125
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