In situ study of granular micromechanics in semi-solid carbon steels
In situ study of granular micromechanics in semi-solid carbon steels
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DOI：
10.1016/j.actamat.2013.03.043
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发表时间：
2013-06-01
期刊：
影响因子：
9.4
通讯作者：
Gourlay, C. M.
中科院分区：
文献类型：
--
作者：
Fonseca, J.;O'Sullivan, C.;Gourlay, C. M.
采用同步加速器射线照相技术研究了类似于 80% 固体的半固态钢的颗粒微观力学。图像分析的颗粒土力学方法表明，在接触力的作用下，准刚性颗粒的平移和旋转会发生变形，并且定向结构和颗粒接触的变化是通过类似于包括“锁定沙”在内的高度压实土壤的机制发生的。然后将晶粒尺度现象与宏观位移和应变场联系起来，结果表明剪切引起的膨胀是晶粒和宏观尺度上的基本响应。在此基础上，对未来的流变实验提出建议。 (C) 2013 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
The granular micromechanics of semi-solid steel a similar to 80% solid are studied by synchrotron radiography. A particulate soil mechanics approach to image analysis shows that deformation occurs by the translation and rotation of quasi-rigid grains under the action of contact forces, and that the changes in directional fabric and grain grain contacts occur by mechanisms similar to those of highly compacted soils including "locked sands". Grain-scale phenomena are then linked to the macroscopic displacement and strain fields and it is shown that shear-induced dilation is a fundamental response at both the grain and macro scales. Based on this, recommendations are made on future rheology experiments. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.