Publication: Research - peer-review › Article in proceedings – Annual report year: 2011
A model for strain gradient crystal visco-plasticity is formulated along the lines proposed by Fleck andWillis (2009) for isotropic plasticity. Size-effects are included in the model due to the addition of gradient terms in both the free energy as well as through a dissipation potential. A finite element solution method is presented, which delivers the slip-rate field and the velocity-field based on two minimum principles. Some plane deformation problems relevant for certain specific orientations of a face centered cubic crystal under plane loading conditions are studied, and effective in-plane parameters are developed based on the crystallographic properties of the material. The problem of cyclic shear of a single crystal between rigid platens is studied as well as void growth of a cylindrical void.
|Title of host publication||Proceedings of the 17th International Symposium on Plasticity & Its Current Applications|
|Conference||International Symposium on Plasticity & Its Current Applications|
|City||Puerto Vallarta, Mexico|
|Period||01/01/11 → …|
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