Maximum Reduction in Thickness in a Single Sheet Forming Pass Based on Unified Strength Theory

Abstract:

Based on unified strength theory, the equation for estimating the maximum reduction in thickness in a single sheet forming pass is obtained. Included the contribution of both intermediate principal shear stress and varying tension-compression-ratio to material mechanical property, the equation developed by this paper can reasonably apply to a wide range of material. It can be proved that the equation for estimating the maximum reduction based on unified strength theory becomes that based on unified yield criterion, when material has equal strength in tension and compression, i.e., the tension-compression-ratio of material is equal to units; and, that the values of the maximum reduction obtained previously based on Mises, or Tresca criterion, are all just special cases of those based on unified yield criterion. In addition, the maximum reduction in thickness for sheet drawing and extrusion is equal to one another.

• Periodical: Applied Mechanics and Materials (Volume 159)
• Pages: 151-155
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.159.151
• Online since: March 2012
• Authors: Xiao Wei Li, Jun Hai Zhao, Qi Yao Wang
• Keywords: Mechanical Engineering, Reduction, Sheet Forming, Unified Strength Theory

References

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