Yield surface

（重定向自Tresca yield criterion）

Figure 1: View of Tresca–Guest yield surface in 3D space of principal stresses

Willam–Warnke yield surface

The Willam–Warnke yield criterion is a three-parameter smoothed version of the Mohr–Coulomb yield criterion that has similarities in form to the Drucker–Prager and Bresler–Pister yield criteria.

The yield criterion has the functional form

However, it is more commonly expressed in Haigh–Westergaard coordinates as

单词	Tresca yield criterion
释义	Tresca yield criterion 英语百科 Yield surface （重定向自Tresca yield criterion） Willam–Warnke yield surface The Willam–Warnke yield criterion is a three-parameter smoothed version of the Mohr–Coulomb yield criterion that has similarities in form to the Drucker–Prager and Bresler–Pister yield criteria. The yield criterion has the functional form However, it is more commonly expressed in Haigh–Westergaard coordinates as
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