A Yield Criterion for Pressure-Sensitive Materials
Following the modified Gurson model in meso-mechanics, the models with spherical holes are established by the assumption which the matrix meets the two-parameter elliptic yield condition. The macroscopic stress expression which contains micro structure parameters and the material equation of yield surface are given by the upper bound theorem of plastic limit analysis. The parameters of the matrix material and damage(porosity) which impact on macroscopic yield surface equation are discussed. These works provide theory foundations for material damage and design.
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
C. H. Lu et al., "A Yield Criterion for Pressure-Sensitive Materials", Applied Mechanics and Materials, Vols. 117-119, pp. 493-497, 2012