Figure 14. The dependence of forming limits in isotropic sheets calculated in Reference 20 using the Marciniak analysis with several yield criteria. VM indicates von Mises and T indicates Tresca. For body-centered cubic and face-centered cubic, the exponents in Equation 8 are 6 and 8.
 

Figure 14

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This figure is a component of the on-line article "Sheet Metal Forming: A Review", which appears in the November 1999 Issue of JOM.