کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
279435 | 1430325 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Suppressed plastic deformation at blunt crack-tips due to strain gradient effects Suppressed plastic deformation at blunt crack-tips due to strain gradient effects](/preview/png/279435.png)
Large deformation gradients occur near a crack-tip and strain gradient dependent crack-tip deformation and stress fields are expected. Nevertheless, for material length scales much smaller than the scale of the deformation gradients, a conventional elastic–plastic solution is obtained. On the other hand, for significant large material length scales, a conventional elastic solution is obtained. This transition in behaviour is investigated based on a finite strain version of the Fleck–Hutchinson strain gradient plasticity model from 2001. The predictions show that for a wide range of material parameters, the transition from the conventional elastic–plastic to the elastic solution occurs for length scales ranging from 0.001 times the size of the plastic zone to a length scale of the same order of magnitude as the plastic zone.
Journal: International Journal of Solids and Structures - Volume 46, Issues 25–26, 15 December 2009, Pages 4430–4436