Large-strain dynamic cavity expansion in a granular material
Large-strain dynamic cavity expansion in a granular material
复制标题
颗粒材料中的大应变动态空腔扩张
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
V. Osinov
中科院分区：
文献类型：
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作者：
V. Osinov
考虑了颗粒介质中圆柱形或球形孔洞对称膨胀的动力学问题。该材料的本构行为是由亚塑性粒状土壤能够描述单调和循环变形的关系。该问题是通过有限差分技术数值求解。在计算区域的外边界处使用无反射边界条件，使得有可能模拟腔壁上的连续多循环载荷。数值算例说明了该方法的有效性。可能的地质力学应用模拟的振动压实和渗透在粒状土壤进行了讨论。
The dynamic problem of the symmetric expansion of a cylindrical or spherical cavity in a granular medium is considered. The constitutive behaviour of the material is governed by a hypoplasticity relation for granular soils capable of describing both monotonic and cyclic deformation. The problem is solved numerically by a finite-difference technique. A nonreflecting boundary condition used at the outer boundary of the computational domain makes it possible to model a continuous multi-cycle loading on the cavity wall. The solution is illustrated by numerical examples. Possible geomechanical applications to the modelling of the vibratory compaction and penetration in granular soils are discussed.