A computational study of a model of single-crystal strain-gradient viscoplasticity With an interactive hardening relation

作者：Bargmann Swantje; Reddy B Daya; Klusemann Benjamin^*

来源：International Journal of Solids and Structures, 2014, 51(15-16): 2754-2764.

DOI：10.1016/j.ijsolstr.2014.03.010

• Single-crystal strain-gradient viscoplasticity
• Interactive hardening relation
• Latent hardening
• Polycrystal

The behavior of a model of single-crystal strain-gradient viscoplasticity is investigated. The model is an extension of a rate-independent version, and includes a new hardening relation that has recently been proposed in the small-deformation context (Gurtin and Reddy, 2014), and which accounts for slip-system interactions due to self and latent hardening. Energetic and dissipative effects, each with its corresponding length scale, are included. Numerical results are presented for a single crystal with single and multiple slip systems, as well as an ensemble of grains. These results provide a clear illustration of the effects of accounting for slip-system interactions.

• 出版日期2014-8-1