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- W2567874107 abstract "The present study deals with a strength criterion for ductile porous materials consisting in a Hill type orthotropic matrix containing spherical voids. The originality of the study lies into an attempt to develop an approximate static Limit Analysis for this class of materials, based on the recent work of Cheng et al. (2014) initially proposed for isotropic von Mises matrix. To this end, we considered, in the framework of a statical limit analysis framework, a trial stress field complying with the boundary conditions of the homogenization problem. Interestingly, the proposed procedure delivers an anisotropic macroscopic criterion which is not only pressure dependent, but exhibits an original sensitivity to the sign of the third invariant of the stress deviator. The obtained results are discussed and compared to existing theoretical models, to numerical bounds and to recently available Finite Element results. Finally, we provide the plastic strain rate equations and the void evolution law which are crucial for formulating the failure of anisotropic ductile metals. The influence of the plastic anisotropy on these constitutive equations is illustrated." @default.
- W2567874107 created "2017-01-13" @default.
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- W2567874107 date "2017-03-01" @default.
- W2567874107 modified "2023-10-16" @default.
- W2567874107 title "Static limit analysis and strength of porous solids with hill orthotropic matrix" @default.
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- W2567874107 doi "https://doi.org/10.1016/j.ijsolstr.2017.01.007" @default.
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