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Title:Calculating formulae of wrinkling limit blankholder force in rectangular part forming with variable individual-segments blankholder force-The third research of rectangular part forming with variable individual-segments blankholder force
Authors: Wang Zhongqi  (Northwest Institute of Technology)        Lei Kun                                      Wang Yahong  (Institute of Harbin Institute of Technology)          (Motorola (China) Electronics Ltd) 
Unit:  
KeyWords: Plastic instability  Bending power  Wrinkling  Energy theory  BHF 
ClassificationCode:TG306
year,vol(issue):pagenumber:2004,29(1):16-20
Abstract:
Based on the mechanical model discussed in the paper Part1,according to energy theory, the paper proposes two formulae calculating the critical wrinkling BHF both on circle and straight sections considering plyanisotropy, strain hardening, thickness variation of sheet metal as well as friction. Using the formulae of critical fracture BHF proposed in Part1, a calculation example fully discussed is presented.
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Reference:
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